I'll say Guinea endli as well as most Guinea endli I've seen are golden brown or tanish brown. Chad endli can look very similar too but they are more greyish brown. However if it's a CB then it could be any variant as CB have been cross between Guinea, Chad, Volta, Nigeria, Ghana and Niger.
endli, kind of looks like the big boy i have, has the same faded colors which makes some people think they are congicus but if you look at the patterns it has endli all over it, ill try to see if i can get a pic of mine