#EFEC28#EFEC28

#EFEC28 is a very light, vivid yellow. Relative luminance 0.785; OKLCH L 91.6% C 0.191 H 108.7°. Best body text is #000000 at 16.70:1 contrast (WCAG AA passes).

Color values

HEX	#EFEC28
RGB	rgb(239, 236, 40)
HSL	hsl(59, 86%, 55%)
HSV	hsv(59, 83%, 94%)
CMYK	cmyk(0%, 1.3%, 83.3%, 6.3%)
CIE-LAB	lab(91.01, -18.52, 84.32)
CIE-LCH	lch(91.01, 86.33, 102.39°)
OKLab	oklab(91.61% -0.0611 0.1808)
OKLCH	oklch(91.61% 0.191 108.7)
XYZ	xyz(65.9778, 78.4971, 13.6831)
Luminance	0.7850 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFEC28 #282BEF

analogous

#EF8828 #EFEC28 #8FEF28

triadic

#EFEC28 #28EFEC #EC28EF

tetradic

#EFEC28 #28EF88 #282BEF #EF288F

square

#EFEC28 #28EF88 #282BEF #EF288F

split-complementary

#EFEC28 #288FEF #8828EF

monochromatic

#92900B #CBC80F #EFEC28 #F3F161 #F7F69A

Accessibility & contrast

On white

1.26

#EFEC28 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

16.70

#EFEC28 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFEC28

16.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFEC28	#FFFFFF	#000000	##000000
##EFEC28	1.00	1.26	16.70	16.70
#FFFFFF	1.26	1.00	21.00	21.00
#000000	16.70	21.00	1.00	1.00
##000000	16.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE200

Deuteranopia (green-blind)

#FFE83D

Tritanopia (blue-blind)

#FFDCCA

Achromatopsia (no color)

#E5E5E5

Design tokens & code

CSS

--color: #efec28;
/* rgb */ color: rgb(239, 236, 40);
/* oklch */ color: oklch(91.6% 0.191 108.7);

Tailwind

colors: {
  custom: {
    50: '#f9f177',
    500: '#efec28',
    950: '#000000',
  },
}

SCSS

$custom: #efec28;
$custom-light: #f9f177;
$custom-dark: #000000;

JSON

{
  "hex": "#efec28",
  "rgb": {
    "r": 239,
    "g": 236,
    "b": 40
  },
  "hsl": {
    "h": 59.095,
    "s": 86.147,
    "l": 54.706
  },
  "oklch": {
    "l": 0.91613,
    "c": 0.19079,
    "h": 108.7
  },
  "luminance": 0.78495
}

Semantic roles & 50–950 ramp

primary

#EFEC28

secondary

#252796

accent

#2FFC2B

background

#FFFFFB

surface

#FFFEF2

border

#D7D6CC

text

#18160A

muted

#86857D

Preview Lab

Preview with #EFEC28

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

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