#EFFF5C#EFFF5C

#EFFF5C is a very light, vivid yellow. Relative luminance 0.906; OKLCH L 95.9% C 0.182 H 114.7°. Best body text is #000000 at 19.13:1 contrast (WCAG AA passes).

Color values

HEX	#EFFF5C
RGB	rgb(239, 255, 92)
HSL	hsl(66, 100%, 68%)
HSV	hsv(66, 64%, 100%)
CMYK	cmyk(6.3%, 0%, 63.9%, 0%)
CIE-LAB	lab(96.26, -25.39, 73.15)
CIE-LCH	lch(96.26, 77.43, 109.14°)
OKLab	oklab(95.91% -0.076 0.1655)
OKLCH	oklch(95.91% 0.182 114.7)
XYZ	xyz(73.2902, 90.6447, 23.7585)
Luminance	0.9064 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFF5C #6C5CFF

analogous

#FFBE5C #EFFF5C #9DFF5C

triadic

#EFFF5C #5CEFFF #FF5CEF

tetradic

#EFFF5C #5CFFBE #6C5CFF #FF5C9D

square

#EFFF5C #5CFFBE #6C5CFF #FF5C9D

split-complementary

#EFFF5C #5C9DFF #BE5CFF

monochromatic

#CBE100 #E9FF1F #EFFF5C #F5FF99 #FBFFD6

Accessibility & contrast

On white

1.10

#EFFF5C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.13

#EFFF5C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFF5C

19.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFF5C	#FFFFFF	#000000	##000000
##EFFF5C	1.00	1.10	19.13	19.13
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.13	21.00	1.00	1.00
##000000	19.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF346

Deuteranopia (green-blind)

#FFF667

Tritanopia (blue-blind)

#FEF1DE

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #efff5c;
/* rgb */ color: rgb(239, 255, 92);
/* oklch */ color: oklch(95.9% 0.182 114.7);

Tailwind

colors: {
  custom: {
    50: '#f8ff92',
    500: '#efff5c',
    950: '#000000',
  },
}

SCSS

$custom: #efff5c;
$custom-light: #f8ff92;
$custom-dark: #000000;

JSON

{
  "hex": "#efff5c",
  "rgb": {
    "r": 239,
    "g": 255,
    "b": 92
  },
  "hsl": {
    "h": 65.89,
    "s": 100,
    "l": 68.039
  },
  "oklch": {
    "l": 0.95905,
    "c": 0.18216,
    "h": 114.7
  },
  "luminance": 0.90643
}

Semantic roles & 50–950 ramp

primary

#EFFF5C

secondary

#3826D9

accent

#00E617

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFFF5C

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

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