#51D9DB Color

#51D9DB is rgb(81, 217, 219) in RGB, hsl(181, 66%, 59%) in HSL, and about cmyk(63%, 1%, 0%, 14%) in CMYK. It has no registered color name of its own — the closest is Medium Turquoise (#48D1CC), very hard to tell apart at ΔE 4.83. Black text is the more readable choice on this background.

#51D9DB

HEX#51D9DB

RGBrgb(81, 217, 219)

HSLhsl(181, 66%, 59%)

HSVhsv(181, 63%, 86%)

CMYKcmyk(63%, 1%, 0%, 14%)

OKLCHoklch(81.3% 0.116 196.5)

LABlab(79.54% -37.52 -12.53)

LCHlch(79.54% 39.56 198.47)

What #51D9DB 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 #51D9DB, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Medium Turquoise#48D1CCΔE 4.83 Dark Turquoise#00CED1ΔE 6.97 Robin Egg Blue#00CCCCΔE 7.55 Maximum Blue Green#30BFBFΔE 9.33 Turquoise#40E0D0ΔE 11.03 Electric Blue#7DF9FFΔE 11.86

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

#51D9DB Channel Values

How #51D9DB breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 81 · G 217 · B 219	8-bit channels as sent to the display
HSL	H 181° · S 66% · L 59%	Easiest model for building lighter and darker variants
HSV	H 181° · S 63% · V 86%	Matches the picker in most design tools
CMYK	C 63% · M 1% · Y 0% · K 14%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	1.71:1 vs white · 12.3:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #51D9DB 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 text1.71:1AA normal AA large AAA normal

TextBlack text12.3:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #51D9DB in the contrast checker.

Colors That Go With #51D9DB

Pairings derived from color-wheel relationships. The complementary color sits opposite #51D9DB; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #51D9DB

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

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #51D9DB.

How #51D9DB 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#51D9DB

Protanopia#CACADB

Protanomaly#A7D0DB

Deuteranopia#BABADD

Deuteranomaly#9BC7DC

Tritanopia#50D9D9

Tritanomaly#50D9DA

Achromatopsia#C6C6C6

Test a full palette in the color blindness simulator.

Using #51D9DB in Code

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

CSS custom property--color-51d9db: #51D9DB;

CSS backgroundbackground-color: #51D9DB;

Tailwind configcolors: { 'color-51d9db': '#51D9DB' }

SwiftUIColor(red: 0.318, green: 0.851, blue: 0.859)

Android XML<color name="color_51d9db">#51D9DB</color>

SVG fillfill="#51D9DB"

More Teal Colors

#51D9DB sits in the teal family. These are its neighbours across that family's full range, each with its own breakdown.

002424 f5ffff 002a38 f0ffff 002d2e eefbfb 003333 ecfeff 003542 ecf7f9 003838 ebffff 006466 009999 00ebeb 0d1616 192929 24fbff 36747d 50bfe6 73a9c2 8dd9cc aec6cf ccffff

#51D9DB Frequently Asked Questions

What color is #51D9DB?

#51D9DB is a mid-tone teal — rgb(81, 217, 219) in RGB and hsl(181, 66%, 59%) in HSL. It carries no registered color name of its own; the closest named color is Medium Turquoise (#48D1CC), which is very hard to tell apart at a CIE76 distance of 4.83.

What is the RGB value of #51D9DB?

#51D9DB is rgb(81, 217, 219) — red 81, green 217, and blue 219 on the 0-255 scale.

What is the CMYK value of #51D9DB?

#51D9DB converts to approximately cmyk(63%, 1%, 0%, 14%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #51D9DB be black or white?

Black text is the more readable choice. #51D9DB scores 1.71:1 against white and 12.3:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #51D9DB as a CSS color keyword?

No. #51D9DB 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 mediumturquoise (#48D1CC) at a CIE76 distance of 4.83, which is very hard to tell apart.

Open #51D9DB in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

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