If you have one of OutofTouch's hairs, chances are that you may find a lot of standard hair colors, without any spec burned it:
Excerpt:

Currently, there's more than 160 items, scalps included.

Furthermore, one of the sets also contains alpha textures, that allows you to easily mix'n'match to bitmaps

Most of the time, I use a 0.5 X-scale when the direction of the hair is vertical.
Besides  this, Biscuits also has a really cool collection of hair bitmaps

𝒫𝒽𝓎𝓁

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