[LeifCarrotson]

Mixing in green and red is equivalent to brightening #0000FF with added white. Try #1AFFFF, for example, it's a magnificently bright light blue. You've not muddied it with brown as you would have by adding an equal amount of green paint and a tenth of red paint; RGB illumination color spaces don't work that way.

[planede]

It still makes it less saturated though and makes it pale blue instead of what it could have been by just really cranking up the light intensity behind that blue subpixel.