#EFFB56#EFFB56

#EFFB56 is a very light, vivid yellow. Relative luminance 0.880; OKLCH L 95.0% C 0.182 H 113.4°. Best body text is #000000 at 18.60:1 contrast (WCAG AA passes).

Color values

HEX	#EFFB56
RGB	rgb(239, 251, 86)
HSL	hsl(64, 95%, 66%)
HSV	hsv(64, 66%, 98%)
CMYK	cmyk(4.8%, 0%, 65.7%, 1.6%)
CIE-LAB	lab(95.17, -23.86, 74.29)
CIE-LCH	lch(95.17, 78.03, 107.80°)
OKLab	oklab(95.01% -0.0723 0.1671)
OKLCH	oklch(95.01% 0.182 113.4)
XYZ	xyz(71.7755, 88.0184, 22.0105)
Luminance	0.8802 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFB56 #6256FB

analogous

#FBB556 #EFFB56 #9CFB56

triadic

#EFFB56 #56EFFB #FB56EF

tetradic

#EFFB56 #56FBB5 #6256FB #FB569C

square

#EFFB56 #56FBB5 #6256FB #FB569C

split-complementary

#EFFB56 #569CFB #B556FB

monochromatic

#C3D205 #E9FA1A #EFFB56 #F5FC92 #FAFECE

Accessibility & contrast

On white

1.13

#EFFB56 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.60

#EFFB56 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFB56

18.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFB56	#FFFFFF	#000000	##000000
##EFFB56	1.00	1.13	18.60	18.60
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.60	21.00	1.00	1.00
##000000	18.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEF3E

Deuteranopia (green-blind)

#FFF362

Tritanopia (blue-blind)

#FEEDDA

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #effb56;
/* rgb */ color: rgb(239, 251, 86);
/* oklch */ color: oklch(95.0% 0.182 113.4);

Tailwind

colors: {
  custom: {
    50: '#f8fc8e',
    500: '#effb56',
    950: '#000000',
  },
}

SCSS

$custom: #effb56;
$custom-light: #f8fc8e;
$custom-dark: #000000;

JSON

{
  "hex": "#effb56",
  "rgb": {
    "r": 239,
    "g": 251,
    "b": 86
  },
  "hsl": {
    "h": 64.364,
    "s": 95.376,
    "l": 66.078
  },
  "oklch": {
    "l": 0.95014,
    "c": 0.18203,
    "h": 113.4
  },
  "luminance": 0.88017
}

Semantic roles & 50–950 ramp

primary

#EFFB56

secondary

#3529CC

accent

#00E611

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFFB56

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

Preview Lab → · Contrast checker → · Palette generator →