Transform via URL background supported values appears incorrect

[cdubz]

Existing documentation URL(s)

https://developers.cloudflare.com/images/transform-images/transform-via-url/#background

What changes are you suggesting?

The documentation says:

Background color to add underneath the image. Applies to images with transparency (for example, PNG) and images resized with fit=pad. Accepts any CSS color, such as #RRGGBB and rgba(…).

(emphasis mine)

The background value doesn't appear to accept any CSS color. I tested with MDN documented <color> and <hex-color> values. From my testing it seems that actual supported values are:

• Named colors
• transparent
• Three-value hex (#RGB)
• Six-value hex (#RRGGBB)

When I try other formats I get either ERROR 9401: Missing or invalid resizing parameters: Error parsing background color: ColorParseError: Invalid format or just malformed URL (with a cf-images header value of err=9401)

Zusätzliche Informationen

No response