Going frogging crazy

I’m having a bit of a problem painting the lace on these Royal Horse Artillery gunners. Apart from the fact that in true Hinton Hunt style the detail is not easy to follow with the brush I just can’t decide what colour the braiding is supposed to be.

According to the pictures in my Blandford Uniforms of Waterloo it appears to be almost a gold colour for all ranks and I have tried this on the Officer on the left. However in my copy of Military Dress of the Peninsular War it says it should be yellow for the rank and file so that’s what I’ve done to the gunner on the right. I don’t think that either really looks right and every picture I find seems to show a different shade of yellow/gold.

So what colour should they be? Answers on a postcard please (or perhaps just leave me a comment).