#EFCD0B Color

#EFCD0B is rgb(239, 205, 11) in RGB, hsl(51, 91%, 49%) in HSL, and about cmyk(0%, 14%, 95%, 6%) in CMYK. It has no registered color name of its own — the closest is Yellow (Munsell) (#EFCC00), indistinguishable to the eye at ΔE 0.93. Black text is the more readable choice on this background.

#EFCD0B

HEX#EFCD0B

RGBrgb(239, 205, 11)

HSLhsl(51, 91%, 49%)

HSVhsv(51, 95%, 94%)

CMYKcmyk(0%, 14%, 95%, 6%)

OKLCHoklch(85.2% 0.174 96.8)

LABlab(83.44% 1.08 82.05)

LCHlch(83.44% 82.06 89.25)

What #EFCD0B 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 #EFCD0B, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Yellow (Munsell)#EFCC00ΔE 0.93 Safety Yellow#EED202ΔE 3.46 Jonquil#F4CA16ΔE 3.87 Deep Lemon#F5C71AΔE 6.1 Citrine#E4D00AΔE 6.14 Cyber Yellow#FFD300ΔE 6.19

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

#EFCD0B Channel Values

How #EFCD0B 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 205 · B 11	8-bit channels as sent to the display
HSL	H 51° · S 91% · L 49%	Easiest model for building lighter and darker variants
HSV	H 51° · S 95% · V 94%	Matches the picker in most design tools
CMYK	C 0% · M 14% · Y 95% · K 6%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	1.57:1 vs white · 13.41:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #EFCD0B 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 text1.57:1AA normal AA large AAA normal

TextBlack text13.41:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #EFCD0B in the contrast checker.

Colors That Go With #EFCD0B

Pairings derived from color-wheel relationships. The complementary color sits opposite #EFCD0B; 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 #EFCD0B

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 #EFCD0B.

How #EFCD0B 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#EFCD0B

Protanopia#D3D307

Protanomaly#DFD109

Deuteranopia#D9D900

Deuteranomaly#E2D400

Tritanopia#F8C1C1

Tritanomaly#F5C69A

Achromatopsia#CECECE

Test a full palette in the color blindness simulator.

Using #EFCD0B in Code

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

CSS custom property--color-efcd0b: #EFCD0B;

CSS backgroundbackground-color: #EFCD0B;

Tailwind configcolors: { 'color-efcd0b': '#EFCD0B' }

SwiftUIColor(red: 0.937, green: 0.804, blue: 0.043)

Android XML<color name="color_efcd0b">#EFCD0B</color>

SVG fillfill="#EFCD0B"

More Yellow Colors

#EFCD0B sits in the yellow family. These are its neighbours across that family's full range, each with its own breakdown.

181807 fffff5 1b1404 fffff0 1f1f00 ffffeb 242400 ffffe5 2a2913 ffffe0 2b2003 ffffd6 573a00 856514 b0a94f cc9900 e0e000 edeae0 f2f1e3 f8f3c9 fcfce8 ffcc00 fff000 ffff0f

#EFCD0B Frequently Asked Questions

What color is #EFCD0B?

#EFCD0B is a mid-tone yellow — rgb(239, 205, 11) in RGB and hsl(51, 91%, 49%) in HSL. It carries no registered color name of its own; the closest named color is Yellow (Munsell) (#EFCC00), which is indistinguishable to the eye at a CIE76 distance of 0.93.

What is the RGB value of #EFCD0B?

#EFCD0B is rgb(239, 205, 11) — red 239, green 205, and blue 11 on the 0-255 scale.

What is the CMYK value of #EFCD0B?

#EFCD0B converts to approximately cmyk(0%, 14%, 95%, 6%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #EFCD0B be black or white?

Black text is the more readable choice. #EFCD0B scores 1.57:1 against white and 13.41:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #EFCD0B as a CSS color keyword?

No. #EFCD0B 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 gold (#FFD700) at a CIE76 distance of 6.31, which is clearly related but distinguishable side by side.

Open #EFCD0B 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 yellow in the color library, the guide to shades of yellow, or the full color library.