How are you supposed to know all the color's numbers?

Answer 1

http://www.w3schools.com/colors/colors_picker.asp
you can use that 😃

Answer 2

it's difficult to memorize all, just try using a color picker on photoshop and see the hexadecimal's code at the bottom right

Answer 3

check http://color.adobe.com
there are all kind of color code you want/need (in hex and rgb) and many many many great and cool palletes prefabs ;-)

Answer 4

You can also make yourself a cheat sheet to refer to so you don't have to try and memorize them.

Answer 5

Google it

Answer 6

see color code in Photoshop

Answer 7

download app "computer shortcut keys" in this all color code present

Answer 8

you can to memorize them or use adobe Photoshop

Answer 9

Try to memorize them