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#ccff21

a balanced, electric green · cool · closest name: yellow

RGB
204, 255, 33
HSL
74°, 100%, 57%
CMYK
20, 0, 87, 0
Luminance
0.8447

Every format

HEX#ccff21
RGBrgb(204, 255, 33)
HSLhsl(74, 100%, 57%)
CMYKcmyk(20%, 0%, 87%, 0%)
LABlab(93.7 -41.5 86.8)
LCHlch(93.7 96.3 115.5)
OKLCHoklch(0.931 0.223 123.3)

Copy-ready code

/* CSS */
color: #ccff21;
background-color: #ccff21;
/* Tailwind (arbitrary) */
class="text-[#ccff21] bg-[#ccff21]"
/* SCSS */
$brand: #ccff21;
/* SwiftUI */
Color(red: 0.800, green: 1.000, blue: 0.129)
/* Android */
Color.parseColor("#ccff21")

Accessibility — WCAG contrast

Aa
#ccff21 on white: 1.17:1
AA ✗ fail · AA-large · AAA
Aa
#ccff21 on black: 17.89:1
AA ✓ pass · AA-large · AAA
true color
protanopia
deuteranopia
tritanopia

RGB percentages

Red80.0%
Green100.0%
Blue12.9%

CMYK percentages

Cyan20.0%
Magenta0.0%
Yellow87.1%
Key (black)0.0%

Color previews

#ccff21 text on a black background

contrast 17.89:1

Card sample

#ccff21 text on a white background

contrast 1.17:1

Card sample

CSS3 live lab

Text font color

The quick brown fox

color: #ccff21;
Background color
Panel with #ccff21 background
background-color: #ccff21;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #ccff21;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(204, 255, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(204, 255, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #ccff21;
background: linear-gradient(135deg, #ccff21, #38FF21);

Monochromatic scale

Palettes built from #ccff21

Shades — darker

Tints — lighter

Hue & tone neighbors

Color harmonies

Nearest named colors

Work with #ccff21 in the Color Lab