Css_valuesval resolve : length -> float -> floatval px : float -> lengthval zero : lengthval substitute :
(string -> Css_syntax.component list option) ->
Css_syntax.component list ->
Css_syntax.component list optionval length : context -> Css_syntax.component -> length optionval color : current:color -> Css_syntax.component list -> color optionval parts : Css_syntax.component list -> Css_syntax.component listval black : colorval transparent : color