TYPO3 Core

Both the highlight color in pagetree and in modullist is changed per JavaScript.

For Pagetree and the color used here is e3dfdb
function hilight_row(frameSetModule,highLightID) { ....
}

In Modullist the function
function highlightModuleMenuItem(trId, mainModule) {...}
is used, but here the class .c-subitem-row-HL takes effect.

So you have just to change Line 228 in stylesheet.css to:
TABLE#typo3-vmenu TR.c-subitem-row-HL { background-color: #e3dfdb; }

(However I dont think that this is a bug, its just the skin )

Thanks for finding out what need to be changed.

I also don't think it's a critical bug, but nontheless it looks nicer if they have the same color, doesn't it?

If no-one disagrees, I will change this.

fixed.
Thanks again!