#40D9ED Color

#40D9ED is rgb(64, 217, 237) in RGB, hsl(187, 83%, 59%) in HSL, and about cmyk(73%, 8%, 0%, 7%) in CMYK. It has no registered color name of its own — the closest is Sky Blue (Crayola) (#76D7EA), visibly different at ΔE 10.42. Black text is the more readable choice on this background.

#40D9ED

HEX#40D9ED

RGBrgb(64, 217, 237)

HSLhsl(187, 83%, 59%)

HSVhsv(187, 73%, 93%)

CMYKcmyk(73%, 8%, 0%, 7%)

OKLCHoklch(81.6% 0.126 208)

LABlab(79.62% -35.96 -21.98)

LCHlch(79.62% 42.15 211.44)

What #40D9ED 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 #40D9ED, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Sky Blue (Crayola)#76D7EAΔE 10.42 Dark Turquoise#00CED1ΔE 11.15 Medium Sky Blue#80DAEBΔE 12.27 Lotion Blue#15F2FDΔE 12.34 Robin Egg Blue#00CCCCΔE 12.81 Middle Blue#7ED4E6ΔE 13.11

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

#40D9ED Channel Values

How #40D9ED 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 64 · G 217 · B 237	8-bit channels as sent to the display
HSL	H 187° · S 83% · L 59%	Easiest model for building lighter and darker variants
HSV	H 187° · S 73% · V 93%	Matches the picker in most design tools
CMYK	C 73% · M 8% · Y 0% · K 7%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	1.7:1 vs white · 12.37:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #40D9ED 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 text1.7:1AA normal AA large AAA normal

TextBlack text12.37:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #40D9ED in the contrast checker.

Colors That Go With #40D9ED

Pairings derived from color-wheel relationships. The complementary color sits opposite #40D9ED; 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 #40D9ED

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 #40D9ED.

How #40D9ED 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#40D9ED

Protanopia#C9C9ED

Protanomaly#A4D0ED

Deuteranopia#B8B8EF

Deuteranomaly#97C6EE

Tritanopia#32DCDC

Tritanomaly#38DBE3

Achromatopsia#C7C7C7

Test a full palette in the color blindness simulator.

Using #40D9ED in Code

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

CSS custom property--color-40d9ed: #40D9ED;

CSS backgroundbackground-color: #40D9ED;

Tailwind configcolors: { 'color-40d9ed': '#40D9ED' }

SwiftUIColor(red: 0.251, green: 0.851, blue: 0.929)

Android XML<color name="color_40d9ed">#40D9ED</color>

SVG fillfill="#40D9ED"

More Teal Colors

#40D9ED 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

#40D9ED Frequently Asked Questions

What color is #40D9ED?

#40D9ED is a mid-tone teal — rgb(64, 217, 237) in RGB and hsl(187, 83%, 59%) in HSL. It carries no registered color name of its own; the closest named color is Sky Blue (Crayola) (#76D7EA), which is visibly different at a CIE76 distance of 10.42.

What is the RGB value of #40D9ED?

#40D9ED is rgb(64, 217, 237) — red 64, green 217, and blue 237 on the 0-255 scale.

What is the CMYK value of #40D9ED?

#40D9ED converts to approximately cmyk(73%, 8%, 0%, 7%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #40D9ED be black or white?

Black text is the more readable choice. #40D9ED scores 1.7:1 against white and 12.37:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #40D9ED as a CSS color keyword?

No. #40D9ED 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 darkturquoise (#00CED1) at a CIE76 distance of 11.15, which is visibly different.

Open #40D9ED 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.