dvsdev
+1y
Sorry wasn't trying to make fun or anything, I haven't done it myself but I do know a guy that did his car ones and it had a pink hue, perhaps you could do the inside of the lens also to make it more red, or try fitting a red filter over the bulb.
Otherwise you could change the wiring to make the reversing bulb a extra braking one and fit a white LED strip above the license plate for your reversing light.