#EFFB63#EFFB63

#EFFB63 is a very light, vivid yellow. Relative luminance 0.882; OKLCH L 95.1% C 0.173 H 113.5°. Best body text is #000000 at 18.65:1 contrast (WCAG AA passes).

Color values

HEX	#EFFB63
RGB	rgb(239, 251, 99)
HSL	hsl(65, 95%, 69%)
HSV	hsv(65, 61%, 98%)
CMYK	cmyk(4.8%, 0%, 60.6%, 1.6%)
CIE-LAB	lab(95.27, -23.06, 69.33)
CIE-LCH	lch(95.27, 73.06, 108.40°)
OKLab	oklab(95.12% -0.0688 0.1584)
OKLCH	oklch(95.12% 0.173 113.5)
XYZ	xyz(72.3477, 88.2473, 25.0242)
Luminance	0.8825 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFB63 #6F63FB

analogous

#FBBB63 #EFFB63 #A3FB63

triadic

#EFFB63 #63EFFB #FB63EF

tetradic

#EFFB63 #63FBBB #6F63FB #FB63A3

square

#EFFB63 #63FBBB #6F63FB #FB63A3

split-complementary

#EFFB63 #63A3FB #BB63FB

monochromatic

#CDDE06 #E9F927 #EFFB63 #F5FD9F #FBFEDA

Accessibility & contrast

On white

1.13

#EFFB63 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.65

#EFFB63 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFB63

18.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFB63	#FFFFFF	#000000	##000000
##EFFB63	1.00	1.13	18.65	18.65
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.65	21.00	1.00	1.00
##000000	18.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF051

Deuteranopia (green-blind)

#FFF36D

Tritanopia (blue-blind)

#FEEDDB

Achromatopsia (no color)

#F1F1F1

Design tokens & code

CSS

--color: #effb63;
/* rgb */ color: rgb(239, 251, 99);
/* oklch */ color: oklch(95.1% 0.173 113.5);

Tailwind

colors: {
  custom: {
    50: '#f7fc95',
    500: '#effb63',
    950: '#000000',
  },
}

SCSS

$custom: #effb63;
$custom-light: #f7fc95;
$custom-dark: #000000;

JSON

{
  "hex": "#effb63",
  "rgb": {
    "r": 239,
    "g": 251,
    "b": 99
  },
  "hsl": {
    "h": 64.737,
    "s": 95,
    "l": 68.627
  },
  "oklch": {
    "l": 0.95122,
    "c": 0.17271,
    "h": 113.5
  },
  "luminance": 0.88246
}

Semantic roles & 50–950 ramp

primary

#EFFB63

secondary

#3B2DD5

accent

#00E612

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFFB63

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

Preview Lab → · Contrast checker → · Palette generator →