#EFFF61#EFFF61

#EFFF61 is a very light, vivid yellow. Relative luminance 0.907; OKLCH L 95.9% C 0.179 H 114.7°. Best body text is #000000 at 19.15:1 contrast (WCAG AA passes).

Color values

HEX	#EFFF61
RGB	rgb(239, 255, 97)
HSL	hsl(66, 100%, 69%)
HSV	hsv(66, 62%, 100%)
CMYK	cmyk(6.3%, 0%, 62%, 0%)
CIE-LAB	lab(96.30, -25.09, 71.24)
CIE-LCH	lch(96.30, 75.53, 109.40°)
OKLab	oklab(95.95% -0.0747 0.1622)
OKLCH	oklch(95.95% 0.179 114.7)
XYZ	xyz(73.5160, 90.7350, 24.9478)
Luminance	0.9073 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFF61 #7161FF

analogous

#FFC061 #EFFF61 #A0FF61

triadic

#EFFF61 #61EFFF #FF61EF

tetradic

#EFFF61 #61FFC0 #7161FF #FF61A0

square

#EFFF61 #61FFC0 #7161FF #FF61A0

split-complementary

#EFFF61 #61A0FF #C061FF

monochromatic

#CEE600 #E9FF24 #EFFF61 #F5FF9E #FBFFDB

Accessibility & contrast

On white

1.10

#EFFF61 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.15

#EFFF61 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFF61

19.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFF61	#FFFFFF	#000000	##000000
##EFFF61	1.00	1.10	19.15	19.15
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.15	21.00	1.00	1.00
##000000	19.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF34D

Deuteranopia (green-blind)

#FFF66C

Tritanopia (blue-blind)

#FDF1DE

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #efff61;
/* rgb */ color: rgb(239, 255, 97);
/* oklch */ color: oklch(95.9% 0.179 114.7);

Tailwind

colors: {
  custom: {
    50: '#f7ff95',
    500: '#efff61',
    950: '#000000',
  },
}

SCSS

$custom: #efff61;
$custom-light: #f7ff95;
$custom-dark: #000000;

JSON

{
  "hex": "#efff61",
  "rgb": {
    "r": 239,
    "g": 255,
    "b": 97
  },
  "hsl": {
    "h": 66.076,
    "s": 100,
    "l": 69.02
  },
  "oklch": {
    "l": 0.95947,
    "c": 0.17855,
    "h": 114.7
  },
  "luminance": 0.90734
}

Semantic roles & 50–950 ramp

primary

#EFFF61

secondary

#3C2BDA

accent

#00E617

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFFF61

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

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