[quote=@Headless]
This is right by my understanding, but it is a bit misleading imo: Green is green because it reflects green light, and absorbs the rest of the spectrum. As you've explained it, we could consider a green leaf to be the absence of green because the light is reflected or not green as you defined white. It can technically be considered correct but then what color is it?
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This is just semantics. I use the term absence in the same context as absorption. The visible absence of a color = to the color being absorbed. That means that a green leaf isn't the absence of green because it's being reflected instead of not being absorbed. This might be the confusion between [url=https://catalyticcolor.com/wp-content/uploads/2016/01/RGB-all-colors-make-white-light.jpg]additive[/url] and [url=https://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/CMYK_subtractive_color_mixing.svg/1024px-CMYK_subtractive_color_mixing.svg.png]subtractive[/url]. Subtractive is used for things that don't add together. IE, if you mix red and blue paint, you get purple paint. It doesn't become brighter because the same light is being reflected, just at a different combined wavelength. If you mix red and blue light together, it becomes a bright magenta because more light is being reflected.

[quote=@Headless]
On an off topic, has anyone ever wondered why plants evolved to reflect green light? By my understanding green light is more energetic than red or blue (when speaking of the sun, at least) one would think plants that absorb said energy for photosynthesis rather than reflect it, would be the dominant plant strain in terms of photosynthesis.
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Green light isn't the most energetic. Red has the lowest wavelength, violet has the highest. That means that violet is the most energetic color. Chlorophyll [i]a[/i] absorbs primarily red and violet while Chlorophyll [i]b[/i] absorbs primarily blue and orange. This means that there's a pretty big gap from teal to yellow where light isn't really absorbed. Why did it evolve for this?

It just did. Evolution doesn't imply the best solution. It's only the one that works and becomes dominant.