For those who prefer a lighter background. In %AppData%\Audacity\Audacity4.ini add/edit:
[ui]
application\currentThemeCode=light
application\themes="[{\"accentColor\":\"#8090f0\",\"accentOpacityHit\":0.7,\"accentOpacityHover\":0.3,\"accentOpacityNormal\":0.5,\"backgroundPrimaryColor\":\"#ffffff\",\"backgroundQuarternaryColor\":\"#f0f0f0\",\"backgroundSecondaryColor\":\"#e0e0e0\",\"backgroundTertiaryColor\":\"#e8e8e8\",\"blackColor\":\"#000000\",\"borderWidth\":0,\"buttonColor\":\"#d0d0d0\",\"buttonOpacityHit\":1,\"buttonOpacityHover\":0.5,\"buttonOpacityNormal\":0.7,\"codeKey\":\"light\",\"focusColor\":\"#75507b\",\"fontPrimaryColor\":\"#171717\",\"fontSecondaryColor\":\"#404040\",\"itemOpacityDisabled\":0.3,\"linkColor\":\"#3279fc\",\"navigationControlBorderWidth\":2,\"playColor\":\"#000000\",\"popupBackgroundColor\":\"#ffffff\",\"projectTabColor\":\"#c4c4c4\",\"recordColor\":\"#dc143c\",\"strokeColor\":\"#cccccc\",\"strokeSecondaryColor\":\"#bbbbbb\",\"textFieldColor\":\"#ffffff\",\"title\":\"Light\",\"whiteColor\":\"#ffffff\"}]"
Zonal map:
