Koi or colors use kernay k liay koi or Colors ki LEDs lagana hongi.. will not recommend different colors, W11 Thori na hai apki Car..
Just LEDs or Break Oil Chahiya hoga apko is puray kaam k liay.. Electrician say nahi kerwaya, Khud Kera hai..
Yes.. just remove black paint coat from the back side of the meter plates to make digits bright.. i will not recommend you to use LEDs, just remove black paint from back, replace bulbs with new and fit it again simply.. this will give you better result..