Skip to content

#51bb21

a dark, vivid green · cool · closest name: forestgreen

RGB
81, 187, 33
HSL
101°, 70%, 43%
CMYK
57, 0, 82, 27
Luminance
0.3740

Every format

HEX#51bb21
RGBrgb(81, 187, 33)
HSLhsl(101, 70%, 43%)
CMYKcmyk(57%, 0%, 82%, 27%)
LABlab(67.6 -55.9 62.0)
LCHlch(67.6 83.5 132.0)
OKLCHoklch(0.702 0.206 138.5)

Copy-ready code

/* CSS */
color: #51bb21;
background-color: #51bb21;
/* Tailwind (arbitrary) */
class="text-[#51bb21] bg-[#51bb21]"
/* SCSS */
$brand: #51bb21;
/* SwiftUI */
Color(red: 0.318, green: 0.733, blue: 0.129)
/* Android */
Color.parseColor("#51bb21")

Accessibility — WCAG contrast

Aa
#51bb21 on white: 2.48:1
AA ✗ fail · AA-large · AAA
Aa
#51bb21 on black: 8.48:1
AA ✓ pass · AA-large · AAA
true color
protanopia
deuteranopia
tritanopia

RGB percentages

Red31.8%
Green73.3%
Blue12.9%

CMYK percentages

Cyan56.7%
Magenta0.0%
Yellow82.4%
Key (black)26.7%

Color previews

#51bb21 text on a black background

contrast 8.48:1

Card sample

#51bb21 text on a white background

contrast 2.48:1

Card sample

CSS3 live lab

Text font color

The quick brown fox

color: #51bb21;
Background color
Panel with #51bb21 background
background-color: #51bb21;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #51bb21;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(81, 187, 33, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(81, 187, 33, 0.45);
Border & gradient
Gradient panel
border: 3px solid #51bb21;
background: linear-gradient(135deg, #51bb21, #21BB58);

Monochromatic scale

Palettes built from #51bb21

Shades — darker

Tints — lighter

Hue & tone neighbors

Color harmonies

Nearest named colors

Work with #51bb21 in the Color Lab