Description of Change

Closes #48086
Closes https://github.com/electron/electron/issues
Refs #47741.

Fixes an issue where the accent color would be accidentally inverted when set to match the system color. This could be seen if you chose e.g. an orange, whose color opposite is blue; the window would have a blue border in that case. This happened because DwmGetColorizationColor returns a color formatted 0xAARRGGBB, and the parsing performed here used Get{R|G|B}Value to parse the color into a COLORREF. From documentation:

The value pointed to by pcrColorization is in an 0xAARRGGBB format. Many Microsoft Win32 APIs, such as COLORREF, use a 0x00BBGGRR format. Be careful to assure that the intended colors are used.

Switch to pulling the color from the windows registry, which does not require extra conversion to ensure the color is in the right format.

cc @bpasero

Tested to ensure the color updates correctly with settings change.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: Fixes an issue where the accent color would be accidentally inverted when set to match the system color.