#51A2FF Color

#51A2FF is rgb(81, 162, 255) in RGB, hsl(212, 100%, 66%) in HSL, and about cmyk(68%, 36%, 0%, 0%) in CMYK. It has no registered color name of its own — the closest is Cornflower Blue (#6495ED), clearly related but distinguishable side by side at ΔE 8.06. Black text is the more readable choice on this background.

#51A2FF

HEX#51A2FF

RGBrgb(81, 162, 255)

HSLhsl(212, 100%, 66%)

HSVhsv(212, 68%, 100%)

CMYKcmyk(68%, 36%, 0%, 0%)

OKLCHoklch(70.4% 0.158 253.6)

LABlab(64.80% -2.79 -54.46)

LCHlch(64.80% 54.53 267.07)

What #51A2FF 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 #51A2FF, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Cornflower Blue#6495EDΔE 8.06 Bleu de France#318CE7ΔE 8.39 United Nations Blue#5B92E5ΔE 8.68 Dodger Blue#1E90FFΔE 12.71 French Sky Blue#77B5FEΔE 13.63 Microsoft Blue#00A2EDΔE 14.18

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

#51A2FF Channel Values

How #51A2FF 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 162 · B 255	8-bit channels as sent to the display
HSL	H 212° · S 100% · L 66%	Easiest model for building lighter and darker variants
HSV	H 212° · S 68% · V 100%	Matches the picker in most design tools
CMYK	C 68% · M 36% · Y 0% · K 0%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	2.64:1 vs white · 7.96:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #51A2FF 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 text2.64:1AA normal AA large AAA normal

TextBlack text7.96:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #51A2FF in the contrast checker.

Colors That Go With #51A2FF

Pairings derived from color-wheel relationships. The complementary color sits opposite #51A2FF; 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 #51A2FF

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 #51A2FF.

How #51A2FF 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#51A2FF

Protanopia#9898FF

Protanomaly#819CFF

Deuteranopia#8E8EFF

Deuteranomaly#7A96FF

Tritanopia#03B1B1

Tritanomaly#33ABD5

Achromatopsia#9F9F9F

Test a full palette in the color blindness simulator.

Using #51A2FF in Code

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

CSS custom property--color-51a2ff: #51A2FF;

CSS backgroundbackground-color: #51A2FF;

Tailwind configcolors: { 'color-51a2ff': '#51A2FF' }

SwiftUIColor(red: 0.318, green: 0.635, blue: 1.000)

Android XML<color name="color_51a2ff">#51A2FF</color>

SVG fillfill="#51A2FF"

More Blue Colors

#51A2FF sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

525e6b 5072a7 5271ff 4f86f7 536878 4f69c6 54626f 4f5b66 54b9f8 4f39f6 5649a7 4e5180 6699cc 8073d4 9bc4e2 beb8ff dce3f9 fafaff 001c3d 007bb8 0f172b 1c398e 2a2069 372a89

#51A2FF Frequently Asked Questions

What color is #51A2FF?

#51A2FF is a light blue — rgb(81, 162, 255) in RGB and hsl(212, 100%, 66%) in HSL. It carries no registered color name of its own; the closest named color is Cornflower Blue (#6495ED), which is clearly related but distinguishable side by side at a CIE76 distance of 8.06.

What is the RGB value of #51A2FF?

#51A2FF is rgb(81, 162, 255) — red 81, green 162, and blue 255 on the 0-255 scale.

What is the CMYK value of #51A2FF?

#51A2FF converts to approximately cmyk(68%, 36%, 0%, 0%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #51A2FF be black or white?

Black text is the more readable choice. #51A2FF scores 2.64:1 against white and 7.96:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #51A2FF as a CSS color keyword?

No. #51A2FF 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 cornflowerblue (#6495ED) at a CIE76 distance of 8.06, which is clearly related but distinguishable side by side.

Open #51A2FF in a Tool

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