#66B8FF Color

#66B8FF is rgb(102, 184, 255) in RGB, hsl(208, 100%, 70%) in HSL, and about cmyk(60%, 28%, 0%, 0%) in CMYK. It has no registered color name of its own — the closest is Very Light Azure (#74BBFB), very hard to tell apart at ΔE 4.48. Black text is the more readable choice on this background.

#66B8FF

HEX#66B8FF

RGBrgb(102, 184, 255)

HSLhsl(208, 100%, 70%)

HSVhsv(208, 60%, 100%)

CMYKcmyk(60%, 28%, 0%, 0%)

OKLCHoklch(76% 0.13 246.7)

LABlab(71.81% -10.13 -43.41)

LCHlch(71.81% 44.57 256.87)

What #66B8FF 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 #66B8FF, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Very Light Azure#74BBFBΔE 4.48 French Sky Blue#77B5FEΔE 5.02 Blue Jeans#5DADECΔE 5.71 Maya Blue#73C2FBΔE 8.46 Picton Blue#45B1E8ΔE 11.13 Vivid Cerulean#00AAEEΔE 11.34

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

#66B8FF Channel Values

How #66B8FF 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 102 · G 184 · B 255	8-bit channels as sent to the display
HSL	H 208° · S 100% · L 70%	Easiest model for building lighter and darker variants
HSV	H 208° · S 60% · V 100%	Matches the picker in most design tools
CMYK	C 60% · M 28% · Y 0% · K 0%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	2.13:1 vs white · 9.87:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66B8FF 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 text2.13:1AA normal AA large AAA normal

TextBlack text9.87:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66B8FF in the contrast checker.

Colors That Go With #66B8FF

Pairings derived from color-wheel relationships. The complementary color sits opposite #66B8FF; 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 #66B8FF

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 #66B8FF.

How #66B8FF 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#66B8FF

Protanopia#ADADFF

Protanomaly#96B2FF

Deuteranopia#A3A3FF

Deuteranomaly#8EACFF

Tritanopia#49C3C3

Tritanomaly#56BFDE

Achromatopsia#B2B2B2

Test a full palette in the color blindness simulator.

Using #66B8FF in Code

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

CSS custom property--color-66b8ff: #66B8FF;

CSS backgroundbackground-color: #66B8FF;

Tailwind configcolors: { 'color-66b8ff': '#66B8FF' }

SwiftUIColor(red: 0.400, green: 0.722, blue: 1.000)

Android XML<color name="color_66b8ff">#66B8FF</color>

SVG fillfill="#66B8FF"

More Blue Colors

#66B8FF sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

66ccff 6699ff 6a5acd 6699cc 6a7282 6666ff 6b6bff 6666cc 6b7c93 666699 6ca0dc 657586 8391a0 9ca8b4 c1bce1 ddddf8 000024 002387 0084d1 100e20 1d293d 2a52be 3737d7 4e5180

#66B8FF Frequently Asked Questions

What color is #66B8FF?

#66B8FF is a light blue — rgb(102, 184, 255) in RGB and hsl(208, 100%, 70%) in HSL. It carries no registered color name of its own; the closest named color is Very Light Azure (#74BBFB), which is very hard to tell apart at a CIE76 distance of 4.48.

What is the RGB value of #66B8FF?

#66B8FF is rgb(102, 184, 255) — red 102, green 184, and blue 255 on the 0-255 scale.

What is the CMYK value of #66B8FF?

#66B8FF converts to approximately cmyk(60%, 28%, 0%, 0%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66B8FF be black or white?

Black text is the more readable choice. #66B8FF scores 2.13:1 against white and 9.87:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66B8FF as a CSS color keyword?

No. #66B8FF 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 deepskyblue (#00BFFF) at a CIE76 distance of 13.94, which is visibly different.

Open #66B8FF 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 blue in the color library, the guide to shades of blue, or the full color library.