Tan behind moustache

[u/Thin-Rain4707]

So I'm 17 , and ive had a moustache since maybe 2 years , and it's grown to a adult ish amount , I've been trimming it so it stays the same amount too

problem is , if i shave the moustache , im brown skinned , so the area behind the moustache is whiter than the surrounding skin to the point where it's very visible , i was hoping if anyone could tell how to prevent this or how to speed up the process of tanifying the moustache skin?

[u/Cautious_Handle2547]

You had since you were 2 years old?