Same color is not same color on spriterenderer?

Those colors are close enough they are probably identical. In fact, they may be actually identical when each color channel gets stored into the usual hardware 8 bits of an RGBA pixel.

Floating (float) point imprecision:

Never test floating point (float) quantities for equality / inequality. Here’s why:

https://starmanta.gitbooks.io/unitytipsredux/content/floating-point.html

Literal float / double issues: