Use better variable naming scheme for color

[pveyes]

Currently we use @cyan, @magenta as variable name for selecting color. I think it will be better to use variable that resemble the actual function, e.g @interface @function-call, @html-tag, @object-property etc

At the bottom of colors.css we can write the aliases for them

@interface: @blue
@function-call: @cyan
@html-tag: @red
@object-property: @yellow