Parse a color value as defined in `CSS Color Level 3 <http://www.w3.org/TR/css3-color/>`.

ParseColorString tokenize the input before calling `ParseColor`.

Parse a `declaration list` (which may also contain at-rules).

ParseDeclarationListString tokenizes `css` and calls `ParseDeclarationList`.

Parse `<An+B> <http://drafts.csswg.org/csswg/css-syntax-3/#anb>`_, as found in `:nth-child() <http://drafts.csswg.org/csswg/selectors/#nth-child-pseudo>` and related Selector pseudo-classes.

Parse a single `component value`.

Parse a single `declaration`.

Parse a non-top-level `rule list`.

ParseRuleListString tokenizes `css` and calls `ParseRuleListString`.

Parse a stylesheet from tokens.

ParseStylesheetBytes tokenizes `input` and calls `ParseStylesheet`.

Serialize nodes to CSS syntax.

Serialize this node to CSS syntax.

Tokenize parses a list of component values.

ColorCurrentColor represents the special value "currentColor" which need document context to be resolved.

ColorInvalid is an empty or invalid color specification.

ColorRGBA is a standard rgba color.

ColorKeywords maps color names to RGBA values.

values in [-1, 1].

LowerableString is a string which can be normalized to ASCII lower case.