The serColor command does not support a text format.
either sharptools sends a numeric format or smartthings supports text or it won’t work.
A capabilty could be made that accepts that format and forwards it to the device with the correct format, but it would only work for this device or I do the custom capability and code for each profile and each command.
I think the best is that smartthings and shsrptools communicate in the same language