some in blue...some black ! why ?

[anandk]

in winxp/sp2, whenever i open any folder, i see some of the file names in black and some in blue. anyone know the reason, please

 

[QwertyManiac]

u have compression enabled in some files, thus they r default in blue colour
one more is, green is for encrypted files

u can change the colours via the TWEAKuiXP