#EFF661#EFF661

#EFF661 is a very light, vivid yellow. Relative luminance 0.851; OKLCH L 94.1% C 0.169 H 111.8°. Best body text is #000000 at 18.02:1 contrast (WCAG AA passes).

Color values

HEX	#EFF661
RGB	rgb(239, 246, 97)
HSL	hsl(63, 89%, 67%)
HSV	hsv(63, 61%, 96%)
CMYK	cmyk(2.8%, 0%, 60.6%, 3.5%)
CIE-LAB	lab(93.94, -20.81, 68.71)
CIE-LCH	lch(93.94, 71.80, 106.85°)
OKLab	oklab(94.06% -0.0626 0.1569)
OKLCH	oklch(94.06% 0.169 111.8)
XYZ	xyz(70.7120, 85.1269, 24.0131)
Luminance	0.8512 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF661 #6861F6

analogous

#F6B361 #EFF661 #A4F661

triadic

#EFF661 #61EFF6 #F661EF

tetradic

#EFF661 #61F6B3 #6861F6 #F661A4

square

#EFF661 #61F6B3 #6861F6 #F661A4

split-complementary

#EFF661 #61A4F6 #B361F6

monochromatic

#C7D10C #E9F327 #EFF661 #F5F99B #FBFDD5

Accessibility & contrast

On white

1.17

#EFF661 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.02

#EFF661 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF661

18.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF661	#FFFFFF	#000000	##000000
##EFF661	1.00	1.17	18.02	18.02
#FFFFFF	1.17	1.00	21.00	21.00
#000000	18.02	21.00	1.00	1.00
##000000	18.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC4F

Deuteranopia (green-blind)

#FFEF6A

Tritanopia (blue-blind)

#FEE8D7

Achromatopsia (no color)

#EEEEEE

Design tokens & code

CSS

--color: #eff661;
/* rgb */ color: rgb(239, 246, 97);
/* oklch */ color: oklch(94.1% 0.169 111.8);

Tailwind

colors: {
  custom: {
    50: '#f7f994',
    500: '#eff661',
    950: '#000000',
  },
}

SCSS

$custom: #eff661;
$custom-light: #f7f994;
$custom-dark: #000000;

JSON

{
  "hex": "#eff661",
  "rgb": {
    "r": 239,
    "g": 246,
    "b": 97
  },
  "hsl": {
    "h": 62.819,
    "s": 89.222,
    "l": 67.255
  },
  "oklch": {
    "l": 0.94056,
    "c": 0.1689,
    "h": 111.8
  },
  "luminance": 0.85125
}

Semantic roles & 50–950 ramp

primary

#EFF661

secondary

#372FCC

accent

#00E60B

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFF661

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

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