#EFFD63#EFFD63

#EFFD63 is a very light, vivid yellow. Relative luminance 0.895; OKLCH L 95.5% C 0.175 H 114.1°. Best body text is #000000 at 18.90:1 contrast (WCAG AA passes).

Color values

HEX	#EFFD63
RGB	rgb(239, 253, 99)
HSL	hsl(65, 97%, 69%)
HSV	hsv(65, 61%, 99%)
CMYK	cmyk(5.5%, 0%, 60.9%, 0.8%)
CIE-LAB	lab(95.79, -24.01, 69.89)
CIE-LCH	lch(95.79, 73.90, 108.96°)
OKLab	oklab(95.54% -0.0714 0.1596)
OKLCH	oklch(95.54% 0.175 114.1)
XYZ	xyz(72.9758, 89.5034, 25.2336)
Luminance	0.8950 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFD63 #7163FD

analogous

#FDBE63 #EFFD63 #A2FD63

triadic

#EFFD63 #63EFFD #FD63EF

tetradic

#EFFD63 #63FDBE #7163FD #FD63A2

square

#EFFD63 #63FDBE #7163FD #FD63A2

split-complementary

#EFFD63 #63A2FD #BE63FD

monochromatic

#CEE303 #E9FC27 #EFFD63 #F5FE9F #FBFFDC

Accessibility & contrast

On white

1.11

#EFFD63 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.90

#EFFD63 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFD63

18.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFD63	#FFFFFF	#000000	##000000
##EFFD63	1.00	1.11	18.90	18.90
#FFFFFF	1.11	1.00	21.00	21.00
#000000	18.90	21.00	1.00	1.00
##000000	18.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF150

Deuteranopia (green-blind)

#FFF46D

Tritanopia (blue-blind)

#FDEFDD

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #effd63;
/* rgb */ color: rgb(239, 253, 99);
/* oklch */ color: oklch(95.5% 0.175 114.1);

Tailwind

colors: {
  custom: {
    50: '#f7fd96',
    500: '#effd63',
    950: '#000000',
  },
}

SCSS

$custom: #effd63;
$custom-light: #f7fd96;
$custom-dark: #000000;

JSON

{
  "hex": "#effd63",
  "rgb": {
    "r": 239,
    "g": 253,
    "b": 99
  },
  "hsl": {
    "h": 65.455,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.95543,
    "c": 0.17487,
    "h": 114.1
  },
  "luminance": 0.89502
}

Semantic roles & 50–950 ramp

primary

#EFFD63

secondary

#3C2DD7

accent

#00E615

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFFD63

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

Preview Lab → · Contrast checker → · Palette generator →