#EFFB52#EFFB52

#EFFB52 is a very light, vivid yellow. Relative luminance 0.880; OKLCH L 95.0% C 0.185 H 113.4°. Best body text is #000000 at 18.59:1 contrast (WCAG AA passes).

Color values

HEX	#EFFB52
RGB	rgb(239, 251, 82)
HSL	hsl(64, 95%, 65%)
HSV	hsv(64, 67%, 98%)
CMYK	cmyk(4.8%, 0%, 67.3%, 1.6%)
CIE-LAB	lab(95.14, -24.07, 75.73)
CIE-LCH	lch(95.14, 79.47, 107.63°)
OKLab	oklab(94.99% -0.0732 0.1695)
OKLCH	oklch(94.99% 0.185 113.4)
XYZ	xyz(71.6188, 87.9557, 21.1854)
Luminance	0.8795 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFB52 #5E52FB

analogous

#FBB252 #EFFB52 #9BFB52

triadic

#EFFB52 #52EFFB #FB52EF

tetradic

#EFFB52 #52FBB2 #5E52FB #FB529B

square

#EFFB52 #52FBB2 #5E52FB #FB529B

split-complementary

#EFFB52 #529BFB #B252FB

monochromatic

#C0CE05 #E9FA16 #EFFB52 #F5FC8E #FAFECA

Accessibility & contrast

On white

1.13

#EFFB52 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.59

#EFFB52 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFB52

18.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFB52	#FFFFFF	#000000	##000000
##EFFB52	1.00	1.13	18.59	18.59
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.59	21.00	1.00	1.00
##000000	18.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEF38

Deuteranopia (green-blind)

#FFF35E

Tritanopia (blue-blind)

#FEECD9

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #effb52;
/* rgb */ color: rgb(239, 251, 82);
/* oklch */ color: oklch(95.0% 0.185 113.4);

Tailwind

colors: {
  custom: {
    50: '#f8fc8c',
    500: '#effb52',
    950: '#000000',
  },
}

SCSS

$custom: #effb52;
$custom-light: #f8fc8c;
$custom-dark: #000000;

JSON

{
  "hex": "#effb52",
  "rgb": {
    "r": 239,
    "g": 251,
    "b": 82
  },
  "hsl": {
    "h": 64.26,
    "s": 95.48,
    "l": 65.294
  },
  "oklch": {
    "l": 0.94985,
    "c": 0.18464,
    "h": 113.4
  },
  "luminance": 0.87954
}

Semantic roles & 50–950 ramp

primary

#EFFB52

secondary

#3328C9

accent

#00E610

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFFB52

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

Preview Lab → · Contrast checker → · Palette generator →