for a quick setup, set the following option:
set -g @dracula-colors "
# simple catppuccin Color Pallette
pink='#cba6f7'
orange='#fab387'
yellow='#f9e2af'
green='#a6e3a1'
cyan='#89dceb'
light_purple='#b4befe'
white='#cdd6f4'
dark_gray='#313244'
red='#f38ba8'
gray='#45475a'
dark_purple='#6c7086'
"
alternatively use the full catppuccin color palette and customise the flags accordingly
Rosewater='#dc8a78'
Flamingo='#dd7878'
Pink='#ea76cb'
Mauve='#8839ef'
Red='#d20f39'
Maroon='#e64553'
Peach='#fe640b'
Yellow='#df8e1d'
Green='#40a02b'
Teal='#179299'
Sky='#04a5e5'
Sapphire='#209fb5'
Blue='#1e66f5'
Lavender='#7287fd'
Text='#4c4f69'
Subtext1='#5c5f77'
Subtext0='#6c6f85'
Overlay2='#7c7f93'
Overlay1='#8c8fa1'
Overlay0='#9ca0b0'
Surface2='#acb0be'
Surface1='#bcc0cc'
Surface0='#ccd0da'
Base='#eff1f5'
Mantle='#e6e9ef'
Crust='#dce0e8'
Rosewater='#f2d5cf'
Flamingo='#eebebe'
Pink='#f4b8e4'
Mauve='#ca9ee6'
Red='#e78284'
Maroon='#ea999c'
Peach='#ef9f76'
Yellow='#e5c890'
Green='#a6d189'
Teal='#81c8be'
Sky='#99d1db'
Sapphire='#85c1dc'
Blue='#8caaee'
Lavender='#babbf1'
Text='#c6d0f5'
Subtext1='#b5bfe2'
Subtext0='#a5adce'
Overlay2='#949cbb'
Overlay1='#838ba7'
Overlay0='#737994'
Surface2='#626880'
Surface1='#51576d'
Surface0='#414559'
Base='#303446'
Mantle='#292c3c'
Crust='#232634'
Rosewater='#f4dbd6'
Flamingo='#f0c6c6'
Pink='#f5bde6'
Mauve='#c6a0f6'
Red='#ed8796'
Maroon='#ee99a0'
Peach='#f5a97f'
Yellow='#eed49f'
Green='#a6da95'
Teal='#8bd5ca'
Sky='#91d7e3'
Sapphire='#7dc4e4'
Blue='#8aadf4'
Lavender='#b7bdf8'
Text='#cad3f5'
Subtext1='#b8c0e0'
Subtext0='#a5adcb'
Overlay2='#939ab7'
Overlay1='#8087a2'
Overlay0='#6e738d'
Surface2='#5b6078'
Surface1='#494d64'
Surface0='#363a4f'
Base='#24273a'
Mantle='#1e2030'
Crust='#181926'
Rosewater='#f5e0dc'
Flamingo='#f2cdcd'
Pink='#f5c2e7'
Mauve='#cba6f7'
Red='#f38ba8'
Maroon='#eba0ac'
Peach='#fab387'
Yellow='#f9e2af'
Green='#a6e3a1'
Teal='#94e2d5'
Sky='#89dceb'
Sapphire='#74c7ec'
Blue='#89b4fa'
Lavender='#b4befe'
Text='#cdd6f4'
Subtext1='#bac2de'
Subtext0='#a6adc8'
Overlay2='#9399b2'
Overlay1='#7f849c'
Overlay0='#6c7086'
Surface2='#585b70'
Surface1='#45475a'
Surface0='#313244'
Base='#1e1e2e'
Mantle='#181825'
Crust='#11111b'
set -g "@dracula-cwd-colors" "Surface0 Text"
set -g "@dracula-fossil-colors" "Green Surface0"
set -g "@dracula-git-colors" "Green Surface0"
set -g "@dracula-hg-colors" "Green Surface0"
set -g "@dracula-battery-colors" "Mauve Surface0"
set -g "@dracula-gpu-usage-colors" "Mauve Surface0"
set -g "@dracula-gpu-ram-usage-colors" "Sky Surface0"
set -g "@dracula-gpu-power-draw-colors" "Green Surface0"
set -g "@dracula-cpu-usage-colors" "orange Surface0"
set -g "@dracula-ram-usage-colors" "Sky Surface0"
set -g "@dracula-tmux-ram-usage-colors" "Sky Surface0"
set -g "@dracula-network-colors" "Sky Surface0"
set -g "@dracula-network-bandwidth-colors" "Sky Surface0"
set -g "@dracula-network-ping-colors" "Sky Surface0"
set -g "@dracula-network-vpn-colors" "Sky Surface0"
set -g "@dracula-attached-clients-colors" "Sky Surface0"
set -g "@dracula-mpc-colors" "Green Surface0"
set -g "@dracula-spotify-tui-colors" "Green Surface0"
set -g "@dracula-playerctl-colors" "Green Surface0"
set -g "@dracula-kubernetes-context-colors" "Sky Surface0"
set -g "@dracula-terraform-colors" "Lavender Surface0"
set -g "@dracula-continuum-colors" "Sky Surface0"
set -g "@dracula-weather-colors" "orange Surface0"
set -g "@dracula-time-colors" "dark_purple white"
set -g "@dracula-synchronize-panes-colors" "Sky Surface0"
set -g "@dracula-libre-colors" "Text Surface0"
set -g "@dracula-ssh-session-colors" "Green Surface0"