No? There's more color, but it's reasonable CSGO always had a kind of dull color grading/textures, though updates changed that A bit later on. A lot of players turn up saturation themselves for the (at least perceived) benefit of visibility so that might be what you saw, you also see CS players playing in 1024x768 stretched still because that's how they always played before.

They definitely gave it that trendy sunny slightly hazy day look. I'm not complaining it's a much nicer aesthetic than the original release of CSGO which felt like a Seattle afternoon in the middle of the desert.