Showing posts with label photoshop. Show all posts
Showing posts with label photoshop. Show all posts

14 May 2011

How to Hide Secret Messages in Noise

13 May 2011

005 Basic Colour Theory: Colours and Their Associations

Included:
* Red
* Pink
* Orange
* Yellow
* Green
* Blue
* Blue-green (teal/turquoise)
* Indigo (blue-purple/blue-violet)
* Purple (violet)
* Black
* White
* Grey



Red top

Red is a warm colour and is often associated with

  • Fire
  • Burning or heat
  • Roses
  • Anger
  • Stop signs
  • Warnings
  • Energy
  • Love
  • Blood
  • Head-strong or stubborn people (ex. red heads)
  • Happiness (esp. in China)
  • Good luck (esp. in China)
  • Marriage (esp. in China)
  • Sex or sexuality
  • Passion
  • Love
  • Lust
  • Anger
  • Confidence
  • Danger
  • War
  • Ares
  • Aphrodite
  • The planet Mars

Pink is a tint of red and is often associated with top

  • Love
  • Innocence
  • Femininity
  • Girls
  • Romance
  • Caring and compassion
  • Tenderness
  • Aphrodite

Orange top

Orange is a warm colour and is often associated with

  • The Sun
  • Happiness/joy
  • Apollo
  • Helios
  • Aphrodite/Venus
  • The planet Venus
  • Warmth
  • Energy
  • Enthusiasm

Yellow top

Yellow is a warm colour and is often associated with

  • The Sun and sunshine
  • Apollo
  • Helios
  • Aphrodite/Venus
  • The planet Venus
  • Sunflowers
  • Happiness/joy
  • Friendship
  • Innocence
  • Optimism
  • Children
  • Spring
  • Cowardice
  • Warning
  • Dishonesty or a two-faced person
  • Gold
  • Jealousy
  • Betrayal

Green top

Green is a cool colour and is often associated with

  • Spring
  • Fertility
  • Nature
  • Hope
  • Peace
  • Calm
  • Money
  • Greed
  • Jealousy or envy
  • Innocence

Blue top

Blue is a cool colour and is often associated with

  • The ocean
  • Water
  • Rain
  • The sky
  • Calm, peace, or tranquility
  • Harmony
  • Trust
  • Cleanliness
  • Sadness
  • Sophistication
  • The planet Uranus
  • Hermes/Mercury
  • The planet Mercury

Blue-green, teal, or turquoise is/are a mixture of blue and green and are associated with top

  • Peace
  • Calm
  • Tranquility
  • Relaxation
  • Water
  • The tropical oceans
  • Poseidon/Neptune
  • The planet Neptune
  • Aphrodite

Indigo top

Indigo (also known as "blue-violet" or "blue-purple") is a cool colour and is often associated with

  • Spirits or spirituality
  • Mystery
  • Wisdom
  • New Age
  • Kronos

In the New Age culture, there are children called "indigo children" and are said to possess special, unusual, and/or supernatural powers. According to Wikipedia, the characteristics of indigo children
include the belief that they are empathetic, curious, strong-willed, independent, and often perceived by friends and family as being strange; possess a clear sense of self-definition and purpose; and also exhibit a strong inclination towards spiritual matters from early childhood. Indigo children have also been described as having a strong feeling of entitlement, or "deserving to be here." Other alleged traits include a high intelligence quotient, an inherent intuitive ability, and resistance to authority. According to Tober and Carroll, indigo children function poorly in conventional schools due to their rejection of authority, being smarter than their teachers, and a lack of response to guilt-, fear- or manipulation-based discipline.
Of course, this describes me and I can tell you I don't know of any special, unusual, or supernatural powers that I may possess except people get uncomfortable if I look them in the eyes. -- But that's just people for you, isn't it? But it wouldn't be any surprise considering I have adult ADD. Oh, science...you ruin everything mysterious. (Lies.) ♥

Violet top

Violet (also known as "purple") is a cool colour and is often associated with

  • Royalty
  • Spirits or spirituality
  • Mystery
  • Wisdom
  • Femininity
  • Grace or elegance
  • Zeus/Jupiter
  • The planet Jupiter

Black top

Black isn't technically a colour. It is associated with

  • Space
  • Mystery
  • Power
  • Sophistication
  • Sex or sexuality
  • Elegance
  • Fear
  • Evil
  • Death
  • Destruction
  • Depression
  • Mourning (esp. in the West)
  • The Underworld/Hades
  • Hades/Pluto

In scientific terms, black is the lack of colour. Something that is black absorbs all colours from the light spectrum, which is why black things are hotter: It retains the energy/light/heat.

To the Egyptians, black is seen as representing goodness and life, as the soil of the Nile is black and brings life to the Egyptian lands.

White top

White isn't technically a colour. It is associated with

  • Innocence
  • Purity
  • Virgins
  • Children
  • Snow and winter
  • Clouds
  • Cleanliness
  • Peace and calm
  • Simplicity
  • Marriage (esp. in the West)

In scientific terms, white is the entire colour spectrum. Things that are white absorb no colour, so we see all of the colours of the spectrum reflect off the surface. This is why white things are generally cooler: They do not absorb the energy/light/heat.

As white is opposite black, it is a symbol of death and destruction to the Egyptian peoples, due to black being the colour of prosperity.

Grey is the mixture of black and white, and is associated with top

  • The Moon
  • Selene
  • Silver
  • Dullness
  • Winter
  • Rainy or cloudy days
  • [Old] age or maturity
  • Wisdom
  • Calm
  • Modesty
  • Reliability
  • Intelligence
  • Athena/Minerva
  • Wisdom
  • The dwarf planet Pluto


Basic Colour Theory:

004 Basic Colour Theory: Colour Schemes with the Colour Wheel

Included:
* Complementary colours
* Analogous colours
* Split complementary colours
* Split analogous colours
* Monochromatic colour scheme
* Triadic colour scheme
* Tetradic or quadratic colour scheme



What is a complementary colour? top

A complementary colour is the colour opposite any given colour on the colour wheel. Basic primary and secondary complementary colours:
  • Red and green
  • Orange and blue
  • Yellow and violet


Complementary colours are used to add tension or energy to something. Some examples include Ariel from Disney's The Little Mermaid (green tail, red hair) and Nemo from Finding Nemo (orange fish, blue water).



Note: It's "complement" not "compliment."


What is an analogous colour? top

An analogous colour is the colour beside any given colour. Basic primary and secondary analogous colours:
  • Red
  • Violet and orange
  • Orange
  • Red and yellow
  • Yellow
  • Orange and green
  • Green
  • Yellow and blue
  • Blue
  • Green and violet
  • Violet
  • Blue and red


Analogous colours are used to create harmony in a colour scheme. Many people would choose an analogous colour scheme when picking out an outfit to wear or colours for the walls of a room and furniture. (Or a monochromatic colour scheme. See below.)


What is a split complement colour? top

A split complement colour is the two analogous colours of any given colour's complement.

This sort of colour scheme would be used to create both energy/tension and harmony.

Some examples: Again, The Little Mermaid (Ariel's hair versus her blue eyes and the ocean; Flounder is yellow and blue), Dori from Finding Nemo (Dori is blue and yellow)



What is a split analogous colour? top

A split analogous colour is the colour one analogous colour away from any given colour.



What is a monochromatic colour scheme? top

A monochromatic colour scheme is a colour scheme using one hue, but various tones of it. Monochromatic colour schemes are often used when matching clothes of walls and rooms (see analogous colour).





What is a triadic colour scheme? top

A triadic colour scheme is a colour scheme using three colours that are equidistant to each other on the colour wheel (meaning they form a triangle).







What is a tetradic or quadratic colour scheme top

A tetradic colour scheme is a colour scheme using colours that form a rectangle on the colour wheel. It is also known as a "double complementary colour scheme."








Basic Colour Theory:

003 Basic Colour Theory: Types of Colours

Included:
* Primary colours
* Secondary colours
* Tertiary colours
* In-between colour names



What is a primary colour? top
  • Red
  • Yellow
  • Blue
A primary colour is a colour that cannot be created by mixing colours together; however, you can make any other colour using the primary colours.

If you have a limited amount of money, you can buy red, yellow, and blue, and create a huge number of colours with them. If you don't buy black or white, you can mix the three to get a dark colour and thin the colours out with water for lighter colours (if you're using a white background).

Primary colours are often used for super heroes in the West, such as Superman. -- Not to say the East doesn't use them: Sailor Moon is a pretty good example. Primaries are flashy colours and can catch peoples' attention easily.




What is a secondary colour? top
  • Orange
  • red + yellow
  • Green
  • yellow + blue
  • Violet
  • blue + red

A secondary colour is the colour created by two primary colours.



An example of characters that use secondary colours would be the Ninja Turtles. They're more harmonious due to the mix of two colours and not being as bright, generally.


What is a tertiary colour? top
  • Red-purple
  • Red-orange
  • Yellow-orange
  • Yellow-green
  • Blue-green
  • Also: "Teal" or "turqoise"*
  • Blue-purple
  • Also: "Indigo"
* Some people consider teal and turqoise to be different colours. Even if you follow this definition, they are various tones of blue-green.

A tertiary colour is a colour created by a primary colour and a secondary colour. Tertiary colours are also called "intermediate colours."

When naming tertiary colours, the primary colour always comes first, -- despite what Crayola may tell you!

An example would be Jasmine from Disney's Aladdin (her teal outfit).



What are the next colours? top

Of course, you could go on into infinity mixing colours (I don't suggest trying it), so what are the other colours called?
  • Quaternary (4th)
  • Quinary (5th)
  • Senary (6th)
  • Septenary (7th)
  • Octonary (8th)
  • Nonary (9th)
  • Denary (10th)
  • Duodenary (12th)
  • Vigenary (20th)
As usual, they're based on the Latin numbers.


Basic Colour Theory:

002 Basic Colour Theory: Vocabulary

Included:
* Hue
* Saturation
* Neutral colours
* Value - HSV vs. HSL
* Tint & shade (tones)
* Warm & cool colours (colour temperature)
* Relativity



What is a hue? top

A colour's hue is what the colour is exactly. For example, pink's hue is red, because pink is red + white.

What is saturation? top

Saturation is how "intense," "bright," or "concentrated" a colour is. "Neon colours" are considered very saturated colours. Technically speaking, a fully saturated colour is supposed to be devoid of all greys and is considered a "pure hue."


"Saturaten?" What am I on, crack??

What is a neutral colour?top

A neutral colour is a colour that is closer to grey. Mixing two complements together will give you a more neutral colour. See the example above under saturation: The "not very saturated" colours are more neutral colours.

What is value? top

Value is how light or dark a colour is. It is also called "lightness."

It seems there are different colour models, and those different colour models provide us with different colour values. In terms of what we might draw if we are using a pencil and looking at a picture, we can just guess how light or dark a colour is with accuracy, because that's how it looks to us.

However, there's another method that provides different results, where very saturated colours are actually darker in value than one might think or perceive.

The two methods are called "HSV" (hue-saturation-value) and "HSL" (hue-saturation-lightness) respectively. They are different because of the different cylindars the colours are modelled on. The biggest change is actually in saturation and how it is defined; however, it seems to affect when you change images to black and white more than anything. If you're interested in the technicalities of these two different methods, you can go here to the Wikipedia article.


Top is HSV, bottom is HSL.

When drawing, as mentioned above, you will probably end up using the HSV method; however, it's good to know that both exist, particularly if you use Photoshop or a similar programme.

The produce HSV black and white images, you have two options:
  • Go to mode > greyscale; or
  • Create a new layer
    • Fill new layer with black, white, or grey
    • Change the layer to "colour" on the layers' palette
    • Everything below this layer will be in black and white. This method allows you to keep some colour, but make the colours more neutral.
To produce HSL black and white, you also have two options:
  • Go to Image > Adjustments > Desaturate
  • Go to Image > Adjustments > Hue/Saturation
    • Change the saturation to -100.
    • You can also edit different colours individually. This method allows you to keep some colour, but make the colours more neutral.

What is a tint? What is a shade?top

A tinted colour is a colour made lighter by mixing it with white. Also called "pale colours" (more of a layman's term). I've also read "clear colours," anyone know about this?

A shaded colour is a colour made darker by using black. Also called "dark colours" (more of a layman's term).

Shades and tints are also known collectively as "tones."



What are warm and cool colours? top

This is called a colour's temperature. Warm colours are usually said to be between red and yellow (including browns and tans) and cool colours are usually said to be between blue-green and violet.

How are colours relative? top

Colours are relative in that they may look warm, cool, dark, light, more or less neutral, etc. based on the colours next to or surrounding it.

You may have seen this optical illusion before:



The tiles on which there are stars are actually the same colours. The dark tiles in the shadow are actually the same colour as the dark tiles in the front as well.

White is often said to be slimming, but it actually depends on what your background is.




Basic Colour Theory: