#EFF37B#EFF37B

#EFF37B is a very light, vivid yellow. Relative luminance 0.839; OKLCH L 93.7% C 0.143 H 110.6°. Best body text is #000000 at 17.78:1 contrast (WCAG AA passes).

Color values

HEX	#EFF37B
RGB	rgb(239, 243, 123)
HSL	hsl(62, 83%, 72%)
HSV	hsv(62, 49%, 95%)
CMYK	cmyk(1.6%, 0%, 49.4%, 4.7%)
CIE-LAB	lab(93.40, -17.40, 56.80)
CIE-LCH	lch(93.40, 59.41, 107.03°)
OKLab	oklab(93.71% -0.0504 0.1342)
OKLCH	oklch(93.71% 0.143 110.6)
XYZ	xyz(71.2238, 83.8835, 31.1742)
Luminance	0.8388 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF37B #7F7BF3

analogous

#F3BB7B #EFF37B #B3F37B

triadic

#EFF37B #7BEFF3 #F37BEF

tetradic

#EFF37B #7BF3BB #7F7BF3 #F37BB3

square

#EFF37B #7BF3BB #7F7BF3 #F37BB3

split-complementary

#EFF37B #7BB3F3 #BB7BF3

monochromatic

#D9DF14 #E8EE43 #EFF37B #F6F8B3 #FCFCE3

Accessibility & contrast

On white

1.18

#EFF37B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.78

#EFF37B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF37B

17.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF37B	#FFFFFF	#000000	##000000
##EFF37B	1.00	1.18	17.78	17.78
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.78	21.00	1.00	1.00
##000000	17.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA70

Deuteranopia (green-blind)

#FFEE81

Tritanopia (blue-blind)

#FDE7D8

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #eff37b;
/* rgb */ color: rgb(239, 243, 123);
/* oklch */ color: oklch(93.7% 0.143 110.6);

Tailwind

colors: {
  custom: {
    50: '#f6f6a4',
    500: '#eff37b',
    950: '#000000',
  },
}

SCSS

$custom: #eff37b;
$custom-light: #f6f6a4;
$custom-dark: #000000;

JSON

{
  "hex": "#eff37b",
  "rgb": {
    "r": 239,
    "g": 243,
    "b": 123
  },
  "hsl": {
    "h": 62,
    "s": 83.333,
    "l": 71.765
  },
  "oklch": {
    "l": 0.93705,
    "c": 0.14332,
    "h": 110.6
  },
  "luminance": 0.83882
}

Semantic roles & 50–950 ramp

primary

#EFF37B

secondary

#4944CE

accent

#06E00D

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#17170F

muted

#858580

Preview Lab

Preview with #EFF37B

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

Preview Lab → · Contrast checker → · Palette generator →