I find the colors used for this tooltip are making it almost unreadable to me (my eyes and/or my screen may be the culprits also). Are they hardcoded, or in a parameter file somewhere ?
Application: kicad
Version: (6.0.0-rc1-dev-1672-g5c3f6f2ab), release build
Libraries:
wxWidgets 3.0.4
libcurl/7.61.1 OpenSSL/1.1.1 (WinSSL) zlib/1.2.11 brotli/1.0.6 libidn2/2.0.5 libpsl/0.20.2 (+libidn2/2.0.5) nghttp2/1.34.0
Platform: Windows 7 (build 7601, Service Pack 1), 32 bit, Little endian, wxMSW
Build Info:
wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8)
Boost: 1.68.0
OpenCASCADE Community Edition: 6.9.1
Curl: 7.61.1
Compiler: GCC 7.3.0 with C++ ABI 1011
They are hard-coded to a Red-ish (too short), Blue-ish (too long) and Green (tuned).
However, the background is picked from your system window color. This can be problematic if the window color is light. Please file a bug report for this and we can address it.