#51EFFB Color

#51EFFB is rgb(81, 239, 251) in RGB, hsl(184, 96%, 65%) in HSL, and about cmyk(68%, 5%, 0%, 2%) in CMYK. It has no registered color name of its own — the closest is Lotion Blue (#15F2FD), clearly related but distinguishable side by side at ΔE 6.08. Black text is the more readable choice on this background.

#51EFFB

HEX#51EFFB

RGBrgb(81, 239, 251)

HSLhsl(184, 96%, 65%)

HSVhsv(184, 68%, 98%)

CMYKcmyk(68%, 5%, 0%, 2%)

OKLCHoklch(87.6% 0.13 202.4)

LABlab(86.78% -39.63 -18.56)

LCHlch(86.78% 43.76 205.10)

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

Lotion Blue#15F2FDΔE 6.08 Electric Blue#7DF9FFΔE 7.62 Aqua#00FFFFΔE 12.23 Fluorescent Blue#15F4EEΔE 12.39 Neon Cyan#00FEFCΔE 12.72 Dark Turquoise#00CED1ΔE 12.95

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

#51EFFB Channel Values

How #51EFFB 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 239 · B 251	8-bit channels as sent to the display
HSL	H 184° · S 96% · L 65%	Easiest model for building lighter and darker variants
HSV	H 184° · S 68% · V 98%	Matches the picker in most design tools
CMYK	C 68% · M 5% · Y 0% · K 2%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	1.39:1 vs white · 15.09:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #51EFFB 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 text1.39:1AA normal AA large AAA normal

TextBlack text15.09:1AA normal AA large AAA normal

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

Colors That Go With #51EFFB

Pairings derived from color-wheel relationships. The complementary color sits opposite #51EFFB; 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 #51EFFB

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 #51EFFB.

How #51EFFB 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#51EFFB

Protanopia#DEDEFB

Protanomaly#B7E5FB

Deuteranopia#CCCCFD

Deuteranomaly#A9DBFC

Tritanopia#4AF1F1

Tritanomaly#4DF0F5

Achromatopsia#DADADA

Test a full palette in the color blindness simulator.

Using #51EFFB in Code

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

CSS custom property--color-51effb: #51EFFB;

CSS backgroundbackground-color: #51EFFB;

Tailwind configcolors: { 'color-51effb': '#51EFFB' }

SwiftUIColor(red: 0.318, green: 0.937, blue: 0.984)

Android XML<color name="color_51effb">#51EFFB</color>

SVG fillfill="#51EFFB"

More Teal Colors

#51EFFB 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

#51EFFB Frequently Asked Questions

What color is #51EFFB?

#51EFFB is a light teal — rgb(81, 239, 251) in RGB and hsl(184, 96%, 65%) in HSL. It carries no registered color name of its own; the closest named color is Lotion Blue (#15F2FD), which is clearly related but distinguishable side by side at a CIE76 distance of 6.08.

What is the RGB value of #51EFFB?

#51EFFB is rgb(81, 239, 251) — red 81, green 239, and blue 251 on the 0-255 scale.

What is the CMYK value of #51EFFB?

#51EFFB converts to approximately cmyk(68%, 5%, 0%, 2%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #51EFFB be black or white?

Black text is the more readable choice. #51EFFB scores 1.39:1 against white and 15.09:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

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

No. #51EFFB 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 aqua (#00FFFF) at a CIE76 distance of 12.23, which is visibly different.

Open #51EFFB in a Tool

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