Thats what I did with my HVAC and the red side looks purple at night so it will probably have a similar effect on the blue side with red bulbs. I to get the clear piece off I had to drill out the black plastic that held it on but a little amazing goop or similar plastic glue will stick it right back on. Post some pics when your done. I think the problem with my switches is the resistors are not high enough and thats why they are so bright. I will try some 580 ohms and see if it dulls it down a little because its way too bright and bothers me while Im driving.