would this count as discrimination in my work place?

[Elizabeth Orozco]

i cant take orders because i have tattoos even though i have them covered but there is another employee that does not cover his up but my tattoos are a little diffrent than his as in mine are like skulls that type of stuff and the other workers tattoos have to do with video games my boss also told me that he wont promote me because of my tattoos and that i will scare custermer even though they are not visible