CSS rgb and rgba functions can't accept custom property #257
Description
The following CSS results in the parser stripping the value.
:root {
--my-color: 255, 0, 0;
}
body {
color: rgb(var(--my-color));
}It seems that the parser thinks the value is invalid since rgb expects three arguments and is only receiving one. However, the CSS works correctly in every major browser.
The reason I am using this syntax is because I'm passing the --my-color variable to various rgba functions throughout the style sheet, and while the color might change, the alpha value of each rgba function is defined separately. I.e., I can't set --my-color to rgba(255, 0, 0, .5) as I'd require hundreds of variables for each opacity.