Ruby is certainly a very beautiful colour, like many of the Mercedes metallic finishes. I have always called my Tunis Biege Metallic '68 280SlL "Goldie" for obvious reasons and, while it remains my favourite colour for the 113, I think the red metallics are just as beautiful, especially with the lovely bamboo interior.
Regards
Pip1947
Tunis Beige Metallic '68 280SL
Sydney