#EF900B Color

#EF900B is rgb(239, 144, 11) in RGB, hsl(35, 91%, 49%) in HSL, and about cmyk(0%, 40%, 95%, 6%) in CMYK. It has no registered color name of its own — the closest is Fulvous (#E48400), very hard to tell apart at ΔE 4.69. Black text is the more readable choice on this background.

#EF900B

HEX#EF900B

RGBrgb(239, 144, 11)

HSLhsl(35, 91%, 49%)

HSVhsv(35, 95%, 94%)

CMYKcmyk(0%, 40%, 95%, 6%)

OKLCHoklch(73.7% 0.164 64.6)

LABlab(68.91% 31.45 72.58)

LCHlch(68.91% 79.10 66.57)

What #EF900B 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 #EF900B, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Fulvous#E48400ΔE 4.69 Carrot Orange#ED9121ΔE 4.92 Orange (RYB)#FB9902ΔE 5.46 Neon Tangerine#F6890AΔE 6.31 Vivid Gamboge#FF9900ΔE 6.75 Tangerine#F28500ΔE 6.88

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

#EF900B Channel Values

How #EF900B 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 239 · G 144 · B 11	8-bit channels as sent to the display
HSL	H 35° · S 91% · L 49%	Easiest model for building lighter and darker variants
HSV	H 35° · S 95% · V 94%	Matches the picker in most design tools
CMYK	C 0% · M 40% · Y 95% · K 6%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	2.42:1 vs white · 8.66:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #EF900B 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 text2.42:1AA normal AA large AAA normal

TextBlack text8.66:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #EF900B in the contrast checker.

Colors That Go With #EF900B

Pairings derived from color-wheel relationships. The complementary color sits opposite #EF900B; 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 #EF900B

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 #EF900B.

How #EF900B 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#EF900B

Protanopia#A5A502

Protanomaly#C79D06

Deuteranopia#B7B700

Deuteranomaly#D0A900

Tritanopia#F38787

Tritanomaly#F28B6B

Achromatopsia#A6A6A6

Test a full palette in the color blindness simulator.

Using #EF900B in Code

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

CSS custom property--color-ef900b: #EF900B;

CSS backgroundbackground-color: #EF900B;

Tailwind configcolors: { 'color-ef900b': '#EF900B' }

SwiftUIColor(red: 0.937, green: 0.565, blue: 0.043)

Android XML<color name="color_ef900b">#EF900B</color>

SVG fillfill="#EF900B"

More Orange Colors

#EF900B sits in the orange family. These are its neighbours across that family's full range, each with its own breakdown.

8b7d6b fff9f5 967969 fff9f0 987456 fff8f0 987654 fff8eb 9b7653 fff7ed 9c8b6e fff7eb c8ad7f dba875 e3dac9 eba675 f1ddcf f8dcd3 fcf5ee ff681f ff9933 ffb83d ffd68a ffe7d1

#EF900B Frequently Asked Questions

What color is #EF900B?

#EF900B is a mid-tone orange — rgb(239, 144, 11) in RGB and hsl(35, 91%, 49%) in HSL. It carries no registered color name of its own; the closest named color is Fulvous (#E48400), which is very hard to tell apart at a CIE76 distance of 4.69.

What is the RGB value of #EF900B?

#EF900B is rgb(239, 144, 11) — red 239, green 144, and blue 11 on the 0-255 scale.

What is the CMYK value of #EF900B?

#EF900B converts to approximately cmyk(0%, 40%, 95%, 6%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #EF900B be black or white?

Black text is the more readable choice. #EF900B scores 2.42:1 against white and 8.66:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #EF900B as a CSS color keyword?

No. #EF900B 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 darkorange (#FF8C00) at a CIE76 distance of 9.14, which is clearly related but distinguishable side by side.

Open #EF900B 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 orange in the color library, the guide to shades of orange, or the full color library.