Seeing green happens when light excites the green cones more than the red cones. ... This, combined with the neuronal nirvana resulting from the overlapping sensitivity of the red and green cones, is why yellow appears to be the brightest color in the spectrum, making it a unique and useful color.

Is yellow to bright?

Difficult to read: Yellow is also the most fatiguing to the eye due to the high amount of light that is reflected. ... Warm: Yellow is a bright color that is often described as cheery and warm.

Why does yellow look light?

And yellow is light by nature, because it combines green (the brightest of RGB) with red (the second brightest). Pure cyan (green plus blue) is also very bright, but less so than yellow. Here is the color wheel above shown as a hue/luminosity chart.