On a side note, and not wanting to criticize the people that spend their time working on something like this, that UI is the main reason why I still use Windows and macOS. Light grey on a white background, dark grey on a that blue background, a black AMD logo on a dark grey background, the padding around the text inside boxes...
I feel bad saying this when it's a free tool, but it's a shame that open source projects struggle so much with UI stuff.
The comment about the colors was based on the screenshots they have on the website, but based on your and other comments here, I can see that it's based on the theme we use use. That's why the AMD logo probably shouldn't be black with a transparent background as then it's hard to see the logo if you're using a dark theme.
Is this a huuuuge deal? Nope. But the programs are just not as polished as they could be.
CPU-Z also does not have padding around the text, it just has a different font, but in the screenshot at techpowerup[0] you can see that, e.g., the "y" in "MBytes" down right is touching (clipped) by the container box and the instruction flags also touch the left side of the box.
It is just that the font in CPU-Z is much smaller than the font used in the screenshots.