#42D9FF Color

#42D9FF is rgb(66, 217, 255) in RGB, hsl(192, 100%, 63%) in HSL, and about cmyk(74%, 15%, 0%, 0%) in CMYK. It has no registered color name of its own — the closest is Vivid Sky Blue (#00CCFF), clearly related but distinguishable side by side at ΔE 8.46. Black text is the more readable choice on this background.

#42D9FF

HEX#42D9FF

RGBrgb(66, 217, 255)

HSLhsl(192, 100%, 63%)

HSVhsv(192, 74%, 100%)

CMYKcmyk(74%, 15%, 0%, 0%)

OKLCHoklch(82.3% 0.133 218.8)

LABlab(80.19% -31.41 -30.63)

LCHlch(80.19% 43.87 224.28)

What #42D9FF 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 #42D9FF, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Vivid Sky Blue#00CCFFΔE 8.46 Blizzard Blue#50BFE6ΔE 11.09 Sky Blue (Crayola)#76D7EAΔE 13.02 Pale Cyan#87D3F8ΔE 14.92 Medium Sky Blue#80DAEBΔE 14.97 Middle Blue#7ED4E6ΔE 15.25

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

#42D9FF Channel Values

How #42D9FF 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 66 · G 217 · B 255	8-bit channels as sent to the display
HSL	H 192° · S 100% · L 63%	Easiest model for building lighter and darker variants
HSV	H 192° · S 74% · V 100%	Matches the picker in most design tools
CMYK	C 74% · M 15% · Y 0% · K 0%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	1.67:1 vs white · 12.6:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #42D9FF 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 text1.67:1AA normal AA large AAA normal

TextBlack text12.6:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #42D9FF in the contrast checker.

Colors That Go With #42D9FF

Pairings derived from color-wheel relationships. The complementary color sits opposite #42D9FF; 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 #42D9FF

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 #42D9FF.

How #42D9FF 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#42D9FF

Protanopia#C9C9FF

Protanomaly#A4D0FF

Deuteranopia#B9B9FF

Deuteranomaly#97C6FF

Tritanopia#21DEDE

Tritanomaly#31DCEC

Achromatopsia#C8C8C8

Test a full palette in the color blindness simulator.

Using #42D9FF in Code

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

CSS custom property--color-42d9ff: #42D9FF;

CSS backgroundbackground-color: #42D9FF;

Tailwind configcolors: { 'color-42d9ff': '#42D9FF' }

SwiftUIColor(red: 0.259, green: 0.851, blue: 1.000)

Android XML<color name="color_42d9ff">#42D9FF</color>

SVG fillfill="#42D9FF"

More Teal Colors

#42D9FF 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

#42D9FF Frequently Asked Questions

What color is #42D9FF?

#42D9FF is a light teal — rgb(66, 217, 255) in RGB and hsl(192, 100%, 63%) in HSL. It carries no registered color name of its own; the closest named color is Vivid Sky Blue (#00CCFF), which is clearly related but distinguishable side by side at a CIE76 distance of 8.46.

What is the RGB value of #42D9FF?

#42D9FF is rgb(66, 217, 255) — red 66, green 217, and blue 255 on the 0-255 scale.

What is the CMYK value of #42D9FF?

#42D9FF converts to approximately cmyk(74%, 15%, 0%, 0%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #42D9FF be black or white?

Black text is the more readable choice. #42D9FF scores 1.67:1 against white and 12.6:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #42D9FF as a CSS color keyword?

No. #42D9FF 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 skyblue (#87CEEB) at a CIE76 distance of 16.5, which is visibly different.

Open #42D9FF 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.