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#51E449 Color

#51E449 is rgb(81, 228, 73) in RGB, hsl(117, 74%, 59%) in HSL, and about cmyk(64%, 0%, 68%, 11%) in CMYK. It has no registered color name of its own — the closest is SGBUS Green (#55DD33), clearly related but distinguishable side by side at ΔE 5.99. Black text is the more readable choice on this background.

#51E449
HEX#51E449
RGBrgb(81, 228, 73)
HSLhsl(117, 74%, 59%)
HSVhsv(117, 68%, 89%)
CMYKcmyk(64%, 0%, 68%, 11%)
OKLCHoklch(81% 0.231 142.4)
LABlab(80.66% -61.94 60.30)
LCHlch(80.66% 86.44 135.76)

What #51E449 Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #51E449, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

SGBUS Green#55DD33ΔE 5.99Lime Green#32CD32ΔE 7.99Screamin' Green#66FF66ΔE 9.31Vivid Malachite#00CC33ΔE 9.58Malachite#0BDA51ΔE 10.02Dark Pastel Green#03C03CΔE 15.19

Browse the full index of named colors A-Z or every green in the library.

#51E449 Channel Values

How #51E449 breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

ModelChannelsNotes
RGBR 81 · G 228 · B 738-bit channels as sent to the display
HSLH 117° · S 74% · L 59%Easiest model for building lighter and darker variants
HSVH 117° · S 68% · V 89%Matches the picker in most design tools
CMYKC 64% · M 0% · Y 68% · K 11%Approximate ink mix; confirm with an ICC profile before printing
Luminance1.67:1 vs white · 12.54:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #51E449 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

Fails AAWhite text1.67:1AA normal AA large AAA normal
TextBlack text12.54:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #51E449 in the contrast checker.

Colors That Go With #51E449

Pairings derived from color-wheel relationships. The complementary color sits opposite #51E449; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#51E449
Complementary
#DC49E4
Analogous
#9EE449
Analogous
#49E48F
Triadic
#4951E4
Triadic
#E44951
Split comp.
#8F49E4
Split comp.
#E4499E

Tints & Shades of #51E449

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

#6AE864
#80EB7A
#99EF95
#AEF2AB
#C8F6C5
#DDFADC

Shades

#2FDF26
#25BF1D
#1E9B17
#187C13
#11590D
#0A3508

Want a full 50-950 ramp with semantic roles? Generate design tokens from #51E449.

How #51E449 Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#51E449
Protanopia#D4D44B
Protanomaly#AFDB4A
Deuteranopia#C3C353
Deuteranomaly#A2D14F
Tritanopia#73D8D8
Tritanomaly#67DDB1
Achromatopsia#C8C8C8

Test a full palette in the color blindness simulator.

Using #51E449 in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-51e449: #51E449;
CSS backgroundbackground-color: #51E449;
Tailwind configcolors: { 'color-51e449': '#51E449' }
SwiftUIColor(red: 0.318, green: 0.894, blue: 0.286)
Android XML<color name="color_51e449">#51E449</color>
SVG fillfill="#51E449"

More Green Colors

#51E449 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#51E449 Frequently Asked Questions

What color is #51E449?

#51E449 is a mid-tone green — rgb(81, 228, 73) in RGB and hsl(117, 74%, 59%) in HSL. It carries no registered color name of its own; the closest named color is SGBUS Green (#55DD33), which is clearly related but distinguishable side by side at a CIE76 distance of 5.99.

What is the RGB value of #51E449?

#51E449 is rgb(81, 228, 73) — red 81, green 228, and blue 73 on the 0-255 scale.

What is the CMYK value of #51E449?

#51E449 converts to approximately cmyk(64%, 0%, 68%, 11%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #51E449 be black or white?

Black text is the more readable choice. #51E449 scores 1.67:1 against white and 12.54:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #51E449 as a CSS color keyword?

No. #51E449 is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is limegreen (#32CD32) at a CIE76 distance of 7.99, which is clearly related but distinguishable side by side.

Open #51E449 in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

Keep exploring: every green in the color library, the guide to shades of green, or the full color library.