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#51BDA8 Color

#51BDA8 is rgb(81, 189, 168) in RGB, hsl(168, 45%, 53%) in HSL, and about cmyk(57%, 0%, 11%, 26%) in CMYK. It has no registered color name of its own — the closest is Keppel (#3AB09E), clearly related but distinguishable side by side at ΔE 5.26. Black text is the more readable choice on this background.

#51BDA8
HEX#51BDA8
RGBrgb(81, 189, 168)
HSLhsl(168, 45%, 53%)
HSVhsv(168, 57%, 74%)
CMYKcmyk(57%, 0%, 11%, 26%)
OKLCHoklch(73% 0.104 178.4)
LABlab(69.95% -36.31 0.82)
LCHlch(69.95% 36.32 178.71)

What #51BDA8 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 #51BDA8, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Keppel#3AB09EΔE 5.26Zomp#39A78EΔE 8.51Medium Aquamarine#66CDAAΔE 9.09Verdigris#43B3AEΔE 9.23Light Sea Green#20B2AAΔE 9.28Persian Green#00A693ΔE 10.42

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

#51BDA8 Channel Values

How #51BDA8 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 189 · B 1688-bit channels as sent to the display
HSLH 168° · S 45% · L 53%Easiest model for building lighter and darker variants
HSVH 168° · S 57% · V 74%Matches the picker in most design tools
CMYKC 57% · M 0% · Y 11% · K 26%Approximate ink mix; confirm with an ICC profile before printing
Luminance2.28:1 vs white · 9.19:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #51BDA8 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 text2.28:1AA normal AA large AAA normal
TextBlack text9.19:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #51BDA8 in the contrast checker.

Colors That Go With #51BDA8

Pairings derived from color-wheel relationships. The complementary color sits opposite #51BDA8; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#51BDA8
Complementary
#BD5167
Analogous
#51BD72
Analogous
#519DBD
Triadic
#A851BD
Triadic
#BDA851
Split comp.
#BD519D
Split comp.
#BD7251

Tints & Shades of #51BDA8

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

#67C5B3
#81CFC0
#97D8CB
#B1E2D8
#C8EAE3
#E1F4F0

Shades

#41AA95
#37907E
#2D7668
#235C51
#19433A
#0F2924

Want a full 50-950 ramp with semantic roles? Generate design tokens from #51BDA8.

How #51BDA8 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#51BDA8
Protanopia#B0B0A8
Protanomaly#94B6A8
Deuteranopia#A3A3AA
Deuteranomaly#8AAEA9
Tritanopia#58BBBB
Tritanomaly#55BCB3
Achromatopsia#ABABAB

Test a full palette in the color blindness simulator.

Using #51BDA8 in Code

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

CSS custom property--color-51bda8: #51BDA8;
CSS backgroundbackground-color: #51BDA8;
Tailwind configcolors: { 'color-51bda8': '#51BDA8' }
SwiftUIColor(red: 0.318, green: 0.741, blue: 0.659)
Android XML<color name="color_51bda8">#51BDA8</color>
SVG fillfill="#51BDA8"

More Green Colors

#51BDA8 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#51BDA8 Frequently Asked Questions

What color is #51BDA8?

#51BDA8 is a mid-tone green — rgb(81, 189, 168) in RGB and hsl(168, 45%, 53%) in HSL. It carries no registered color name of its own; the closest named color is Keppel (#3AB09E), which is clearly related but distinguishable side by side at a CIE76 distance of 5.26.

What is the RGB value of #51BDA8?

#51BDA8 is rgb(81, 189, 168) — red 81, green 189, and blue 168 on the 0-255 scale.

What is the CMYK value of #51BDA8?

#51BDA8 converts to approximately cmyk(57%, 0%, 11%, 26%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #51BDA8 be black or white?

Black text is the more readable choice. #51BDA8 scores 2.28:1 against white and 9.19:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #51BDA8 as a CSS color keyword?

No. #51BDA8 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 9.09, which is clearly related but distinguishable side by side.

Open #51BDA8 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.