Learning Activity, Colour Theory
Having watched the video with Nigel French – describe, in your own words, what each of these colour systems means: RGB and CMYK.
I had to learn a lot about colour models in Fine arts and in 3d Design, especially when it came to lighting and rendering.
Rgb is a colour model system based on primary colours, Red, Green and of course Blue.This is considered to be what is known as an Additive system, which means that the three colours are added to eachother in different intensities to create different colours. In additive you can start with black (no intensity) and through mixing create white (full intensity). Rgb has a vast amount of colour potentiaL but it has a drawback – it is primarily used in electronic devices who individual settings of intensity dictate the actual value of the colour shown. None the less, the RGB model is the standard for all devices and particularly the 216 ‘web safe’ for HTML programming.
Bottom line: mix them all together with full intensity you get white.(R=255 G=255 B=255 being a full white and R=0 G=0 B=0 being black.)
CMYK or Cyan, Magenta, Yellow and Key … (Black) is another colour model but this one is subtractive. It’s primarily used for printing – the system is special in that it assumes the base is white and as such subtracts values to create CMYK and the variations within. Always remember though, CMYK cannot acheive a TRUE black with C=0 M=0 Y=0 K=100 you instead need to use an odd mix called True Black or Rich black C=75 M=68 Y=67 K=90.
Bottom line: Mix them all together with full intensity and you get (sort of) black.(CMYK values for each color use a percentage between 0-100%)
Here’s a handy little printout from my friends at PaperLeaf!
Do remember there are actual OTHER more obscure colour models that either try to improve upon the aforementioned two or are used for other purposes (like Natural Color System, ‘Lab’ or CIELAB or CIELAB D50 which is not device dependent) and more delicate versions light Hue, Saturation, Lightness (HSL) and Hue, Saturation and Value (HSV) and Pantone.