Commodore 64 User Manual page 149

The actual values to POKE into a color memory location to change a
character's color are:
0 BLACK 8
ORANGE
1 WHITE 9 BROWN
2 RED
1 0
Light RED
3
CYAN
11 GRAY 1
4 PURPLE
12 GRAY 2
5 GREEN 13 Light GREEN
6 BLUE 14 Light BLUE
7 YELLOW
15 GRAY 3
For example, to change the color of a character located at the upper
left-hand corner of the screen to red, type: POKE 55296,2.
COLOR MEMORY MAP
0 10
COLUMN
20 30 39
55335
55296
55336
55376
55416
55456
55496
55536
55576
55616
55656
55696
55736
55776
55816
55856
55896
55936
55976
56016
56056
56096
56136
56176
56216
56256
-- --------- - ---
- - - - - - - - - - - - -
-- --------- -
f
56295
139
20
24