It's been a bit of a quest of mine to get the empeg to match with my VW GTI dash. I have a set of Darkstorm gel filters (sorry, not willing to part with them), but I can advise against the Congo Blue. While the resultant color is fairly close to the VW "indiglo" color, it is rendered unreadable in daylight. There just isn't enough light getting through the dark filter.
My solution was a set of 430nm LEDs from Mouser (and some elbow grease from Stu at Eutronix
), a clear button set from Greenlights, and a Darkstorm Fluorescent Red lens (no longer available). This combination still isn't perfect (LEDs a tad too violet; red lens a bit orange), but I'm happy enough. I have a crummy old Kodak digital camera but will attempt some pics tonight.
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