If you don't want to modify software files, you can force a dark mode through your Operating System.
: Press Left Alt + Left Shift + Print Screen to toggle High Contrast Mode . This will force Flash CS6 to adopt a high-contrast dark theme, though it may alter the appearance of other applications simultaneously. adobe flash cs6 dark mode fix
In the right pane, look for a value named Window . By default, its value is usually 255 255 255 (which equals White). If you don't want to modify software files,
Would you like a link to a community-tested FlashTheme.dat dark file? adobe flash cs6 dark mode fix