hBasic Manual

hex #AARRGGBB as alpha, red, green, blue    e.g #FF0000FF
or
hex #RRGGBB as red, green, blue (alpha assumed to be solid)     e.g #0000FF
or
any one of the 564 HTML color names listed below or original website here.    e.g "blue"

These color strings are searched for in the above order.

A color name can add an alpha-channel value e.g

CONSOLE.SET "TEXTCOLOR darkcoffee.169"
is the same as
CONSOLE.SET "TEXTCOLOR darkcoffee#A9"
is the same as
CONSOLE.SET "TEXTCOLOR #A93B2F2F"     (6 digit hex value can be prefixed with 2 digit alpha)

#hh    A 'H'ash ( # ) begins the alpha value as HEX   e.g #A9
.ddd   A 'dot'     ( '.' ) begins the alpha value as Decimal   e.g .169

148 W3C ' web colors' of which 139 are unique.

23 android names of which 17 are unique. (pre-defined in API Color.parseColor()).
These color values may differ from the W3C ones, e.g android green is different from  W3C green.