Colour
There are several systems for identifying color accurately on a screen, including headecimal, RGB and RGBA, defined further down this page. Designers choose and combine colours into attractive pallettes based on the qualities of colours. Colour harmonies are particular relationships amoung colours grouped around a colour wheel; colour palettes built around these common constellations generally feel balanced and complete.
For decades, logos were reproduced primarily in black and white, even one aditional colour was a luxury. Today, however, colour is dominant. Contemporay logos functionprimarily on screen, and full colour printing has become commonplace. While making sure a logo functions in black and white is still an excellent test of the marks basic pysical fitness, designers must consider every logo within the context of the company or organisation it will represent and range of uses it will have. A telivision station or an online buisness might find little need for a black and white logo.
*This is an interesting game somebody has created using JavaScript, this allows you to test your knowledge of colour and judges your reaction time.
