#EFCF57#EFCF57

#EFCF57 is a very light, vivid yellow. Relative luminance 0.637; OKLCH L 86.0% C 0.142 H 94.2°. Best body text is #000000 at 13.73:1 contrast (WCAG AA passes).

Color values

HEX	#EFCF57
RGB	rgb(239, 207, 87)
HSL	hsl(47, 83%, 64%)
HSV	hsv(47, 64%, 94%)
CMYK	cmyk(0%, 13.4%, 63.6%, 6.3%)
CIE-LAB	lab(83.79, -2.10, 61.96)
CIE-LCH	lch(83.79, 62.00, 91.94°)
OKLab	oklab(85.96% -0.0105 0.1412)
OKLCH	oklch(85.96% 0.142 94.2)
XYZ	xyz(59.6325, 63.6676, 18.1630)
Luminance	0.6366 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFCF57 #5777EF

analogous

#EF8357 #EFCF57 #C3EF57

triadic

#EFCF57 #57EFCF #CF57EF

tetradic

#EFCF57 #57EF83 #5777EF #EF57C3

square

#EFCF57 #57EF83 #5777EF #EF57C3

split-complementary

#EFCF57 #57C3EF #8357EF

monochromatic

#BA9612 #EABF1F #EFCF57 #F4DF8F #FAEFC7

Accessibility & contrast

On white

1.53

#EFCF57 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

13.73

#EFCF57 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFCF57

13.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFCF57	#FFFFFF	#000000	##000000
##EFCF57	1.00	1.53	13.73	13.73
#FFFFFF	1.53	1.00	21.00	21.00
#000000	13.73	21.00	1.00	1.00
##000000	13.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#E3CB49

Deuteranopia (green-blind)

#EBD55D

Tritanopia (blue-blind)

#FFC0B5

Achromatopsia (no color)

#D1D1D1

Design tokens & code

CSS

--color: #efcf57;
/* rgb */ color: rgb(239, 207, 87);
/* oklch */ color: oklch(86.0% 0.142 94.2);

Tailwind

colors: {
  custom: {
    50: '#f8dd8b',
    500: '#efcf57',
    950: '#000000',
  },
}

SCSS

$custom: #efcf57;
$custom-light: #f8dd8b;
$custom-dark: #000000;

JSON

{
  "hex": "#efcf57",
  "rgb": {
    "r": 239,
    "g": 207,
    "b": 87
  },
  "hsl": {
    "h": 47.368,
    "s": 82.609,
    "l": 63.922
  },
  "oklch": {
    "l": 0.85963,
    "c": 0.14154,
    "h": 94.2
  },
  "luminance": 0.63664
}

Semantic roles & 50–950 ramp

primary

#EFCF57

secondary

#314EB9

accent

#34DF06

background

#FFFEFC

surface

#FFFCF4

border

#D7D5CE

text

#18150C

muted

#86847F

Preview Lab

Preview with #EFCF57

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →