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#66B8EA Color

#66B8EA is rgb(102, 184, 234) in RGB, hsl(203, 76%, 66%) in HSL, and about cmyk(56%, 21%, 0%, 8%) in CMYK. It has no registered color name of its own — the closest is Maya Blue (#73C2FB), clearly related but distinguishable side by side at ΔE 5.36. Black text is the more readable choice on this background.

#66B8EA
HEX#66B8EA
RGBrgb(102, 184, 234)
HSLhsl(203, 76%, 66%)
HSVhsv(203, 56%, 92%)
CMYKcmyk(56%, 21%, 0%, 8%)
OKLCHoklch(75% 0.108 237.4)
LABlab(71.08% -15.23 -33.23)
LCHlch(71.08% 36.56 245.37)

What #66B8EA 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 #66B8EA, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Maya Blue#73C2FBΔE 5.36Aero#7CB9E8ΔE 5.46Picton Blue#45B1E8ΔE 6.15Blue Jeans#5DADECΔE 8.33Very Light Azure#74BBFBΔE 8.47Light Sky Blue#87CEFAΔE 9.23

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

#66B8EA Channel Values

How #66B8EA 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 102 · G 184 · B 2348-bit channels as sent to the display
HSLH 203° · S 76% · L 66%Easiest model for building lighter and darker variants
HSVH 203° · S 56% · V 92%Matches the picker in most design tools
CMYKC 56% · M 21% · Y 0% · K 8%Approximate ink mix; confirm with an ICC profile before printing
Luminance2.19:1 vs white · 9.61:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #66B8EA 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 text2.19:1AA normal AA large AAA normal
TextBlack text9.61:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #66B8EA in the contrast checker.

Colors That Go With #66B8EA

Pairings derived from color-wheel relationships. The complementary color sits opposite #66B8EA; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#66B8EA
Complementary
#EA9966
Analogous
#66EADB
Analogous
#6676EA
Triadic
#EA66B8
Triadic
#B8EA66
Split comp.
#EA6676
Split comp.
#EADB66

Tints & Shades of #66B8EA

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

#7DC2ED
#8FCBF0
#A5D5F3
#B7DDF5
#CEE8F8
#E0F0FB

Shades

#3EA5E5
#1D90D7
#1875AF
#135D8B
#0D4263
#08273A

Want a full 50-950 ramp with semantic roles? Generate design tokens from #66B8EA.

How #66B8EA 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#66B8EA
Protanopia#ADADEA
Protanomaly#96B2EA
Deuteranopia#A3A3EB
Deuteranomaly#8EACEB
Tritanopia#54BFBF
Tritanomaly#5CBCD2
Achromatopsia#AFAFAF

Test a full palette in the color blindness simulator.

Using #66B8EA in Code

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

CSS custom property--color-66b8ea: #66B8EA;
CSS backgroundbackground-color: #66B8EA;
Tailwind configcolors: { 'color-66b8ea': '#66B8EA' }
SwiftUIColor(red: 0.400, green: 0.722, blue: 0.918)
Android XML<color name="color_66b8ea">#66B8EA</color>
SVG fillfill="#66B8EA"

More Blue Colors

#66B8EA sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#66B8EA Frequently Asked Questions

What color is #66B8EA?

#66B8EA is a light blue — rgb(102, 184, 234) in RGB and hsl(203, 76%, 66%) in HSL. It carries no registered color name of its own; the closest named color is Maya Blue (#73C2FB), which is clearly related but distinguishable side by side at a CIE76 distance of 5.36.

What is the RGB value of #66B8EA?

#66B8EA is rgb(102, 184, 234) — red 102, green 184, and blue 234 on the 0-255 scale.

What is the CMYK value of #66B8EA?

#66B8EA converts to approximately cmyk(56%, 21%, 0%, 8%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #66B8EA be black or white?

Black text is the more readable choice. #66B8EA scores 2.19:1 against white and 9.61:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #66B8EA as a CSS color keyword?

No. #66B8EA 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 lightskyblue (#87CEFA) at a CIE76 distance of 9.23, which is clearly related but distinguishable side by side.

Open #66B8EA in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

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