Sabin_377 :
End do you think is a difference between colours red, black,white end blue ???
Yep, Red has a higher HEX Value of #FF0000, while blue falls under the lower end of the spectrum of #0000FF.
Black has the most compatible value of #000000 and is usually the most compatible unless the rest of your system is running on #FFFFFF, pairing #FFFFFF with #000000 only works in some cases.
The only thing you have to worry about is personal preference.