You are probably looking for a change made after 482903 (known good), but no later than 482904 (first known bad).
CHANGELOG URL:
  https://chromium.googlesource.com/chromium/src/+log/8b4643f67dc1c6b142a152aa2b76c771287e3a22..1894d423068be735560e0171922c833c4091b5d1

@ccameron:  Could you please look into the issue and confirm whether its intented. Pardon me if it has nothing to do with your changes and if possible please assign it to concern owner.

Could you clarify the meaning of "as expected"?

With color correct rendering, a given color specified in CSS will not necessarily be the color that will appear on your screen (it will only be that way if your screen is sRGB).

The colour should be as per the screenshot attached "Expected_overlay.png"

I still don't understand what is intended by "as expected". Several elements are circled in red in the pictures, not sure which in particular is of concern.

Highlighted where ever the blue color is seen on settings page, as there is slight difference in blue color which is seen in good and bad builds provided. 

Do you have a color profile associated with your monitor? Chrome 61 is now respecting your color profile, which means that the colors will be slightly different. If you want the old behavior back, set your monitor to have an sRGB color profile.

If you didn't mean to install a color profile on this machine, the change can be reversed by running

xicc /usr/share/color/icc/colord/sRGB.icc

Marking as working-as-intended.