Sorting a list of hex color codes by spectrum

Hex is just base 16 so: 0-9 are 0-9 (just like decimal), 10 = A, 11 = B, 12 = C, 13 = D, 14 = E and 15 = F.

so 1F = 16 + 15 = 31
22 = 32 + 2 = 34

The color values are R G B. Each color gets 2 hex digits. So FF0000 is red, 00FF00 is green, 0000FF is blue.

FFFFFF is white and 000000 is black, so 880000 is just a darker red than FF0000.

Mixing them can get a little complicated if you aren't used to it (remember complimentary colors.)

Play around on this site and you should get the hang of it.