Add color() functions to public interface.

Author: tiaanl

src/lib.rs

@@ -69,7 +69,8 @@ fn parse_border_spacing(_context: &ParserContext, input: &mut Parser)
 
 pub use crate::color::{
     hsl_to_rgb, hwb_to_rgb, parse_color_keyword, AbsoluteColor, AngleOrNumber, Color,
-    ColorComponentParser, Lab, Lch, NumberOrPercentage, Oklab, Oklch, RGBA,
+    ColorComponentParser, ColorFunction, Lab, Lch, NumberOrPercentage, Oklab, Oklch,
+    PredefinedColorSpace, RGBA,
 };
 pub use crate::cow_rc_str::CowRcStr;
 pub use crate::from_bytes::{stylesheet_encoding, EncodingSupport};