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#51CDB4 Color

#51CDB4 is rgb(81, 205, 180) in RGB, hsl(168, 55%, 56%) in HSL, and about cmyk(60%, 0%, 12%, 20%) in CMYK. It has no registered color name of its own — the closest is Medium Aquamarine (#66CDAA), clearly related but distinguishable side by side at ΔE 6.76. Black text is the more readable choice on this background.

#51CDB4
HEX#51CDB4
RGBrgb(81, 205, 180)
HSLhsl(168, 55%, 56%)
HSVhsv(168, 60%, 80%)
CMYKcmyk(60%, 0%, 12%, 20%)
OKLCHoklch(77.2% 0.116 177.4)
LABlab(75.05% -40.52 1.68)
LCHlch(75.05% 40.56 177.62)

What #51CDB4 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 #51CDB4, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Medium Aquamarine#66CDAAΔE 6.76Turquoise#40E0D0ΔE 9.84Keppel#3AB09EΔE 10.79Medium Turquoise#48D1CCΔE 10.89Pearl Aqua#88D8C0ΔE 12.36Mountain Meadow#30BA8FΔE 12.89

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

#51CDB4 Channel Values

How #51CDB4 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 205 · B 1808-bit channels as sent to the display
HSLH 168° · S 55% · L 56%Easiest model for building lighter and darker variants
HSVH 168° · S 60% · V 80%Matches the picker in most design tools
CMYKC 60% · M 0% · Y 12% · K 20%Approximate ink mix; confirm with an ICC profile before printing
Luminance1.96:1 vs white · 10.74:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #51CDB4 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 text1.96:1AA normal AA large AAA normal
TextBlack text10.74:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #51CDB4 in the contrast checker.

Colors That Go With #51CDB4

Pairings derived from color-wheel relationships. The complementary color sits opposite #51CDB4; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#51CDB4
Complementary
#CD516A
Analogous
#51CD76
Analogous
#51A7CD
Triadic
#B451CD
Triadic
#CDB451
Split comp.
#CD51A7
Split comp.
#CD7651

Tints & Shades of #51CDB4

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

#69D3BE
#81DAC8
#98E1D3
#B0E8DD
#C8EFE7
#DFF6F1

Shades

#38C2A6
#2FA28B
#278673
#1E6758
#164B40
#0D2B25

Want a full 50-950 ramp with semantic roles? Generate design tokens from #51CDB4.

How #51CDB4 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#51CDB4
Protanopia#BFBFB4
Protanomaly#9FC5B4
Deuteranopia#B0B0B7
Deuteranomaly#94BCB6
Tritanopia#5ACACA
Tritanomaly#56CBC2
Achromatopsia#B9B9B9

Test a full palette in the color blindness simulator.

Using #51CDB4 in Code

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

CSS custom property--color-51cdb4: #51CDB4;
CSS backgroundbackground-color: #51CDB4;
Tailwind configcolors: { 'color-51cdb4': '#51CDB4' }
SwiftUIColor(red: 0.318, green: 0.804, blue: 0.706)
Android XML<color name="color_51cdb4">#51CDB4</color>
SVG fillfill="#51CDB4"

More Green Colors

#51CDB4 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#51CDB4 Frequently Asked Questions

What color is #51CDB4?

#51CDB4 is a mid-tone green — rgb(81, 205, 180) in RGB and hsl(168, 55%, 56%) in HSL. It carries no registered color name of its own; the closest named color is Medium Aquamarine (#66CDAA), which is clearly related but distinguishable side by side at a CIE76 distance of 6.76.

What is the RGB value of #51CDB4?

#51CDB4 is rgb(81, 205, 180) — red 81, green 205, and blue 180 on the 0-255 scale.

What is the CMYK value of #51CDB4?

#51CDB4 converts to approximately cmyk(60%, 0%, 12%, 20%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #51CDB4 be black or white?

Black text is the more readable choice. #51CDB4 scores 1.96:1 against white and 10.74:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #51CDB4 as a CSS color keyword?

No. #51CDB4 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 mediumaquamarine (#66CDAA) at a CIE76 distance of 6.76, which is clearly related but distinguishable side by side.

Open #51CDB4 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.