dreadpirate has also recolored all the ea store hairs, here. you can also scroll through spookymuffins’ default-tag for individual posts and more pictures and detailed information for different hairs.
it takes some time to read through the posts and the files to see what you need to replace all the maxis hairs with nhs colors and not get duplicated files. but like it says in the post, it’s not all the maxis hairs… dreadpirate has shared some too, here.
Here’s a post with a link to all of the nhs texture defaults done by spookymuffin (link called ‘download all texture defaults’). all the maxis hairs have been defaulted in the nhs colors by and - i keep sharing their files time after time, i’m surprised not many people seem to know these exist (i have all the links on my resources -page, too!) most of these default files use different alpha edits, lifa’s included.