Add missing colors to fix color comparison

Added magenta and cyan that were only present with their alternative
names (fuchsia and aqua). See https://en.wikipedia.org/wiki/X11_color_names#Clashes_between_web_and_X11_colors_in_the_CSS_color_scheme

functions/colors.zsh

@@ -97,7 +97,9 @@ function getColorCode() {
     codes[yellow]=011
     codes[blue]=012
     codes[fuchsia]=013
+    codes[magenta]=013
     codes[aqua]=014
+    codes[cyan]=014
     codes[white]=015
     codes[grey0]=016
     codes[navyblue]=017