For a secondary color to complement your main color #AB0F09 (Crimson Red) and black, I recommend using a shade of gold or mustard yellow. These colors add warmth and contrast beautifully with deep red and black.

Here are a couple of suggestions:

1. Mustard Yellow - It provides a vibrant contrast and adds a cheerful touch.
   • Hex Code: #E1B12C
2. Gold - This gives a luxurious feel and pairs well with red and black.
   • Hex Code: #FFD700

Would you like to incorporate one of these suggestions into your color palette, or would you prefer a different option?