CAT_VALIDATION_ERROR_COLOR_INVALID fires when color is empty, longer than Snap's character cap, or contains symbols or hex codes. Use plain language color names and separate multiple colors with a slash.
Snap Catalog Manager's product schema has format and value rules per attribute. This issue is typically: missing a required attribute for the category, an invalid enum value (e.g., 'XL' submitted where 'M, L, XL' is the valid set), out-of-range numbers, or attributes that conflict across the feed.