With inbuilt themes, you can customize the look of the card without doing any manual customization.
Use ?theme=THEME_NAME
parameter like so :-

|
|
|
default
 |
transparent
 |
dark
 |
highcontrast
 |
catppuccin-latte
 |
catppuccin-frappe
 |
catppuccin-macchiato
 |
catppuccin-mocha
 |
vue
 |
vue-dark
 |
github_dark
 |
github_dark_highcontrast
 |
github_dark_dimmed
 |
github_dark_tritanopia
 |
github_light
 |
github_light_highcontrast
 |
github_light_tritanopia
 |
whatsapp-light
 |
whatsapp-dark
 |
buefy
 |
buefy-dark
 |
solarized-light
 |
solarized-dark
 |
vision-friendly-dark
 |
deuteranopia-friendly-dark
 |
garden
 |
shadow_red
 |
shadow_green
 |
shadow_blue
 |
shadow_orange
 |
shadow_purple
 |
shadow_brown
 |
gruvbox
 |
gruvbox_light
 |
apprentice
 |
radical
 |
tokyonight
 |
shades-of-purple
 |
ayu
 |
ayu-light
 |
ayu-mirage
 |
merko
 |
carbonfox
 |
dawnfox
 |
dayfox
 |
duskfox
 |
nightfox
 |
nordfox
 |
terafox
 |
humoris
 |
iceberg
 |
laederon
 |
zenburn
 |
bluloco
 |
bluloco-dark
 |
aura
 |
lava-light
 |
lava-dark
 |
neon
 |
neon-dark
 |
neon-palenight
 |
neon-blurange
 |
kacho_ga
 |
kanagawa
 |
kanagawa_light
 |
space
 |
space_light
 |
lavender_breeze
 |
lavender_dream
 |
sunset-gradient
 |
ocean-gradient
 |
ambient-gradient
 |
siny-gradient
 |
purple-gradient
 |
monochrome-light-gradient
 |
monochrome-dark-gradient
 |
endless-gradient
 |
twitch-gradient
 |
Want to add a new theme? Consider reading the contribution guidelines :D