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#57FF81 Color

#57FF81 is rgb(87, 255, 129) in RGB, hsl(135, 100%, 67%) in HSL, and about cmyk(66%, 0%, 49%, 0%) in CMYK. It has no registered color name of its own — the closest is Spring Green (#00FF7F), clearly related but distinguishable side by side at ΔE 8.17. Black text is the more readable choice on this background.

#57FF81
HEX#57FF81
RGBrgb(87, 255, 129)
HSLhsl(135, 100%, 67%)
HSVhsv(135, 66%, 100%)
CMYKcmyk(66%, 0%, 49%, 0%)
OKLCHoklch(88.6% 0.218 148.2)
LABlab(89.46% -64.42 46.57)
LCHlch(89.46% 79.49 144.13)

What #57FF81 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 #57FF81, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Spring Green#00FF7FΔE 8.17Screamin' Green#66FF66ΔE 12.11Malachite#0BDA51ΔE 14.34Medium Spring Green#00FA9AΔE 15.48Very Light Malachite Green#64E986ΔE 15.69Mint#98FF98ΔE 19.56

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

#57FF81 Channel Values

How #57FF81 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 87 · G 255 · B 1298-bit channels as sent to the display
HSLH 135° · S 100% · L 67%Easiest model for building lighter and darker variants
HSVH 135° · S 66% · V 100%Matches the picker in most design tools
CMYKC 66% · M 0% · Y 49% · K 0%Approximate ink mix; confirm with an ICC profile before printing
Luminance1.31:1 vs white · 16.03:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #57FF81 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 text1.31:1AA normal AA large AAA normal
TextBlack text16.03:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #57FF81 in the contrast checker.

Colors That Go With #57FF81

Pairings derived from color-wheel relationships. The complementary color sits opposite #57FF81; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#57FF81
Complementary
#FF57D5
Analogous
#81FF57
Analogous
#57FFD5
Triadic
#8157FF
Triadic
#FF8157
Split comp.
#D557FF
Split comp.
#FF5781

Tints & Shades of #57FF81

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

#6BFF90
#85FFA3
#99FFB3
#B3FFC6
#C7FFD5
#E0FFE8

Shades

#29FF5E
#00FA3E
#00CC33
#009E28
#00701C
#004211

Want a full 50-950 ramp with semantic roles? Generate design tokens from #57FF81.

How #57FF81 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#57FF81
Protanopia#EDED82
Protanomaly#C3F482
Deuteranopia#DADA88
Deuteranomaly#B4EA85
Tritanopia#7AF4F4
Tritanomaly#6EF8D0
Achromatopsia#E1E1E1

Test a full palette in the color blindness simulator.

Using #57FF81 in Code

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

CSS custom property--color-57ff81: #57FF81;
CSS backgroundbackground-color: #57FF81;
Tailwind configcolors: { 'color-57ff81': '#57FF81' }
SwiftUIColor(red: 0.341, green: 1.000, blue: 0.506)
Android XML<color name="color_57ff81">#57FF81</color>
SVG fillfill="#57FF81"

More Green Colors

#57FF81 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#57FF81 Frequently Asked Questions

What color is #57FF81?

#57FF81 is a light green — rgb(87, 255, 129) in RGB and hsl(135, 100%, 67%) in HSL. It carries no registered color name of its own; the closest named color is Spring Green (#00FF7F), which is clearly related but distinguishable side by side at a CIE76 distance of 8.17.

What is the RGB value of #57FF81?

#57FF81 is rgb(87, 255, 129) — red 87, green 255, and blue 129 on the 0-255 scale.

What is the CMYK value of #57FF81?

#57FF81 converts to approximately cmyk(66%, 0%, 49%, 0%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #57FF81 be black or white?

Black text is the more readable choice. #57FF81 scores 1.31:1 against white and 16.03:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #57FF81 as a CSS color keyword?

No. #57FF81 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 springgreen (#00FF7F) at a CIE76 distance of 8.17, which is clearly related but distinguishable side by side.

Open #57FF81 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.