> I need to transform r:g:b triplets to hexidecimal colors in a bash > shell script. Does anyone have an expression that will do that? awk with %x or %X: echo 255 | awk '{printf("%x\n", $1)}' echo 255:255:255 | tr ':' ' ' | awk '{printf("%X:%X:%X\n", $1, $2, $3)}' Hamish