Guess the composition of colors that make up a target color. Get as close as you can!
Daily
Guess 5 colors specific to today
Infinite
Guess as many colors as you like
Practice
See the result of your color selection
RGB
Red, Green, Blue
These are additive, like light. As you add colors, the final color grows lighter.
CMYK
Cyan, Magenta, Yellow, Black
These are subtractive, like ink. As you add colors, the final color gets darker.