Which colour should be used in a greater amount to make light grey?

Correct answer: White

The governing concept is value controlled by mixing proportion. Grey is made from black and white, and increasing the proportion of white increases the mixture’s lightness or value. Consequently, light grey contains more white than black, so option D is correct. More black would produce dark grey, while red or blue would introduce a hue and no longer make a simple neutral light grey. Add black sparingly when adjusting the shade.