Wanting a lighter gray for the lines , I promoted the gray ( # 808080 ) color of the theme to a main color by double clicking it and chose a lighter gray . Finally I created a new style sheet with the new colors . In the whole process I found that Chris Pederick 's Web Developer Extension for Firefox invaluable .

Select from:
[I] To use the Web Developer Extension for Firefox .;
[II] To change the colors .;
[III] None of the above choices .;
[IV] He wanted to make the color by double clicking it .;
Q: Why did he make a new style ?
[II]