Thank you for your time and road map.

My original site was working fine and color has not much significance by itself.
Just after switching to responsive template my customisation which took years to tuneup was blown away.
Everything looked terrible: colors, fonts, wrong characters, input field became large and letters inside small.
Functionality though was working. I was able to sell.

So, I am not professional programmer, how to bring this in order?

My first move was to understand what controls the appearance. I found in this forum: .css files.
I started to "interrogate" them. The simplest to me is color. I was trying to find where codes for colors are?
So, simple logic tells me to search for HEX or RGB and find those lines and see which line are around.

The problem was disagreement between what I measured by "tool" and what .css file codes showed. So for me was important to understand what was wrong.

Now I understand that opacity 0.6 changes color appearance as well "probe result".
There will be there people like me, who did not programing all there life and many things of this nature are not obvious for us.
But we take time to learn and appreciate help people like you.

Thank you again.