Per the spec, CODE can be pretty much anything:
By convention LDConfig uses numeric codes (and the library's parsing code enforces numeric only). Does LDView recognize non-numeric codes? If so, LPub3D is free to use an alpha-numeric code that doesn't clash with the LDConfig.
Quote:x is any identifier recognized by a rendering program as a color code
By convention LDConfig uses numeric codes (and the library's parsing code enforces numeric only). Does LDView recognize non-numeric codes? If so, LPub3D is free to use an alpha-numeric code that doesn't clash with the LDConfig.