To support css var

[letitfly]

color: var(--color);

causes error:
ERROR CSSVariable: Missing token for production ident: ('CHAR', '-', 155, 12)
ERROR CSSVariable: Missing token for production end FUNC ")"
ERROR PropertyValue: No match: ('CHAR', ')', 155, 19)
ERROR PropertyValue: Unknown syntax or no value: var(--color)
ERROR CSSStyleDeclaration: Syntax Error in Property: color: var(--color)

css var may not be useful in a email, but I am using it as a general css inline tool. thanks

[peterbe]

I suspect that's a limitation of cssutils which isn't getting much love and attention these days.