Step 2 - Add Some Color Now you will find that this opens up your new document. Now using the set foreground colour options, double click on the first coloured box, this will then open up another box in which you will put the following colour code in [2b2b2b]. Now that you have selected the colour, it is time to select the paint buck tool and click anywhere in the white space. You will then see that this changes the background colour from white to a dark grey colour.