Can you get your driver's license if you are color blind?

Yes. Color vision is not an issue with driver's licensing. All traffic signals are made of colors that will not be confusing to the color deficient . Driver's license testing only is concerned with line acuity (like 20/20) and field of vision (how far can you see to each side).
Depends. The most common type of "color blindness" is red-green color deficiency. Blue-yellow deficiency or true color blindness (achromatopsia) are rare. Color testing can identify which. The problem is a lack of certain types of cones or their opsins (light-sensitive compounds). Red-green deficiency can be adapted to fairly easily and is not very limiting, but the others can significantly impact vision.