This is no exaggeration. A word of advice. Do not despise female stage staff, they can be good. Powder colours for scenery painting should be ordered from a shade card if you cannot visit the suppliers in person. Always use a colour about two shades darker than you visualise for your set.
Lighting takes out some of the intensity of the colour.
I like to use oil-bound poster paint for bold designs. It is bright and comes up well under the lighting. Powder colours must be mixed with size or the colours will flake off, with disastrous result to costumes. I like to sketch out a rough design, and discuss colours with the Stage Manager and the lighting expert. This saves time because I can do my proper sketch right away.