Affecting Support for #RGBA colour values may validate previously invalid values

Published: | Categories: CSS


Firefox 49 has added the support for 4-digit (#RGBA) and 8-digit (#RRGGBBAA) hexadecimal notations for RGBa colour values. Due to this change, previously invalid values could be valid, yielding unexpected results. A typical example is #0000, which is now parsed as transparent. You may want to double check your stylesheets for such errors.

Update: Microsoft Dynamics CRM 2016 is known to be affected because of #0000 wrongly used for the text colour on a few elements.