I dyed my hair a light brown and my natural color is dark brown almost black.. for some reason it looked red in the sun after dying it back to dark brown it now looks like a very dark purple! I'm scared if I dye it it'll just make the color worse! What to doo??

You really need to go to a salon to have them evaluate it. You certainly can't keep coloring and coloring or you'll damage your hair.

It may be as simple as the beautician using the correct color, or they may need to strip some of the color off first.