Thanks for that. Ordered a black one.I have a white silicon case on my remote which is non symmetrical so I can see at a glance which way round it is. Also stops it being so slippy.
It's this one:
elago R2 Slim Case Compatible with Apple TV Siri Remote 4K / 4th Generation - Anti-Slip, Slim Fit, Durable Material, Scratch-Free Silicone, Shock Absorption (Nightglow Blue) https://www.amazon.co.uk/dp/B07GV987KL/ref=cm_sw_r_cp_api_i_--WqEbTS4XK38