Low temperature font color is hard to read

I’m finding the low temperatures hard to read in the weather section of the skin. I’m talking about the 4 or 8 day forecast where high and low temperatures are shown for each day in red (high temperature) and blue (low temperature) font color.
The red font color is ok, but the blue is really hard to read (for me) due to the low contrast with the background.

I tried to change the font color myself, with no luck. After a bit of digging I found that the low temperature font color is defined in line 1323 on the includes.xml file of the 1080i folder of the skin.

This line:

<textcolor>Blue</textcolor>

I tried changing it to a lighter shade of blue (RoyalBlue) but the skin doesn’t seem to accept the change. It displays no values for the low temperatures. I tried using that color both in color name (RoyalBlue) and hex code (#4169E1) formats, without success.

Maybe the skin (or Kodi itself) only accepts a limited set of font colors. Maybe I’m doing something wrong. In any case, I’d appreciate some help to be able to change it.

If others also find that font color hard to read, maybe the developers could consider changing that font color in the skin.