Color variations only at text colors

Up to 4 color schemes by random

[jetteroheller]

I plan to have always the same background color, like the surrounding background.

Only variations in

Title
Description
URL

What CTR effects are to be expected?

[jetteroheller]

I tested it 3 days long on one of my domains.

Before: dark colored background

Title white
Text white
URL color

After: same dark colored background

Title white white white color
Text white color color white
URL color white color color

The CTR remained the same.
But what I did only realise after 3 days,
the average page views per visitor was going down.

So I changed back to the old color system.