Also, if the palette you're working with does not have color ranges that you need, for example, purple in Doom, you can use direct color translation. Direct color translations involve specifying a color through triplets of values between 0-255 in Red Green Blue format. So...
...Would translate Doom's green range into a color range between black and bright purple. In Strife, it would translate the light blue range into the same black to bright purple range.