Issue
Using AutoLISP® or another customization method, you want to specify the color of an object using the numeric value for that color. Specifically, you want to know the numeric values to assign color ByBlock and ByLayer.
Solution
The numeric values to assign color ByBlock and ByLayer are as follows:
ByBlock Color number 0 (zero)
ByLayer Color number 256
here kitty, kitty...