I was trying to run a code that I saw on a answer for this question
The code is simply
ParametricPlot[{Cos[u], Sin[u]}, {u, 0, 2 Pi}] /.
Line[l_List] :> {{Red, Polygon[l]}, {Black, Line[l]}}
And the result was supposed to be:
However, when I run the same code in Mathematica 10.2 I get this result:
I'm running exactly the same code, no extra global variables. Also, the color Red works perfectly fine in other situations. I've tried RGBColor[1,0,0] and the result is the same.
Similar issues happen with other colors too. Every color is "brighter".