Hi there! Just checking here, but, did you buy that lineart? I know you didn't create it because there's a Necsie signature on the buck's leg. If you didn't, i don't think you should request people to color it because someone else made it and you could get in serious trouble for utilizing something you didnt buy the right to
Here's the page for the buck lineart incase you indeed didn't buy it but maybe r still interesting on it :0
https://chrysisi.deviantart.com/art/Stag-Line-Art-582097288Good luck with your buck characters though!
also, i just noticed WolfQueen's reply rip but anyways i hope my advice is useful!