Checklist

• I have read through the manual page (man fzf)
• I have searched through the existing issues
• For bug reports, I have checked if the bug is reproducible in the latest version of fzf

Output of fzf --version

0.61.3 (d24b58e)

OS

• Linux
• macOS
• Windows
• Etc.

Shell

• bash
• zsh
• fish

Problem / Steps to reproduce

LS_COLORS= fd --color=always |
 FZF_DEFAULT_OPTS_FILE= FZF_DEFAULT_OPTS= fzf --ansi --multi --color=selected-bg:#ff0000

highlighting seems not correct (but current-bg seems work as expected).