Shadow

className="drop-shadow-[0_0.2rem_0.2rem_rgba(0,0,0,1)"

Opacity

opacity-0
opacity-100

Background color

# default
bg-current

# transparent
bg-transparent

# color names
bg-black
bg-white

# color name + scale
# minimum
bg-gray-50
bg-gray-100
bg-gray-200
# maximum
bg-gray-950

Remove Default Link Style

no-underline text-white