On the Subject of Decomposed RGB Arithmetic but a tiny bit better

That’s a lot of colors and letters. Oh here is also the original manual.

+Take the sum.
XMultiply the digits.
mThe first one you see in this order: - 0 +
MThe first one you see in this order: + 0 -
Take the sum.
One Zero? Invert.
ØSame: 0
One Zero: -
Else: +
Black (-) --- Maroon (I) 0-- Red (R) +--
Indigo (A) --0 Plum (J) 0-0 Rose (S) +-0
Blue (B) --+ Violet (K) 0-+ Magenta (T) +-+
Forest (C) -0- Olive (L) 00- Orange (U) +0-
Teal (D) -00 Grey (M) 000 Salmon (V) +00
Azure (E) -0+ Maya (N) 00+ Pink (W) +0+
Green (F) -+- Lime (O) 0+- Yellow (X) ++-
Jade (G) -+0 Mint (P) 0+0 Cream (Y) ++0
Cyan (H) -++ Aqua (Q) 0++ White (Z) +++
-
0123
456-
78-B
9-GR
TL
3210
654-
87-B
9-GR
TR
9863
752-
41-B
0-GR
BL
0479
158-
26-B
3-GR