I don't own a horse, but I've stuck to a theme of navy blue and dark, conservative colours for my own gear! Amongst the jodhpurs that were a reasonable price (i.e. £20 rather than £60+), it was a choice between an ugly shade of fuscia, beige, or navy and blue - so I went for the last option. My mucker boots are also navy, and while I couldn't get navy half-chaps I did get black ones. My crop is navy too xD
If you believe everything you read, better not read.