#EFFB4F#EFFB4F

#EFFB4F is a very light, vivid yellow. Relative luminance 0.879; OKLCH L 95.0% C 0.187 H 113.4°. Best body text is #000000 at 18.58:1 contrast (WCAG AA passes).

Color values

HEX	#EFFB4F
RGB	rgb(239, 251, 79)
HSL	hsl(64, 96%, 65%)
HSV	hsv(64, 69%, 98%)
CMYK	cmyk(4.8%, 0%, 68.5%, 1.6%)
CIE-LAB	lab(95.12, -24.23, 76.78)
CIE-LCH	lch(95.12, 80.51, 107.51°)
OKLab	oklab(94.96% -0.074 0.1712)
OKLCH	oklch(94.96% 0.187 113.4)
XYZ	xyz(71.5071, 87.9111, 20.5973)
Luminance	0.8791 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFB4F #5B4FFB

analogous

#FBB14F #EFFB4F #99FB4F

triadic

#EFFB4F #4FEFFB #FB4FEF

tetradic

#EFFB4F #4FFBB1 #5B4FFB #FB4F99

square

#EFFB4F #4FFBB1 #5B4FFB #FB4F99

split-complementary

#EFFB4F #4F99FB #B14FFB

monochromatic

#BDCB05 #EAFA13 #EFFB4F #F4FC8B #FAFEC7

Accessibility & contrast

On white

1.13

#EFFB4F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.58

#EFFB4F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFB4F

18.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFB4F	#FFFFFF	#000000	##000000
##EFFB4F	1.00	1.13	18.58	18.58
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.58	21.00	1.00	1.00
##000000	18.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEF32

Deuteranopia (green-blind)

#FFF35C

Tritanopia (blue-blind)

#FFECD9

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #effb4f;
/* rgb */ color: rgb(239, 251, 79);
/* oklch */ color: oklch(95.0% 0.187 113.4);

Tailwind

colors: {
  custom: {
    50: '#f8fc8a',
    500: '#effb4f',
    950: '#000000',
  },
}

SCSS

$custom: #effb4f;
$custom-light: #f8fc8a;
$custom-dark: #000000;

JSON

{
  "hex": "#effb4f",
  "rgb": {
    "r": 239,
    "g": 251,
    "b": 79
  },
  "hsl": {
    "h": 64.186,
    "s": 95.556,
    "l": 64.706
  },
  "oklch": {
    "l": 0.94964,
    "c": 0.18652,
    "h": 113.4
  },
  "luminance": 0.8791
}

Semantic roles & 50–950 ramp

primary

#EFFB4F

secondary

#3327C7

accent

#00E610

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFFB4F

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

Preview Lab → · Contrast checker → · Palette generator →