#EFFF5F#EFFF5F

#EFFF5F is a very light, vivid yellow. Relative luminance 0.907; OKLCH L 95.9% C 0.180 H 114.7°. Best body text is #000000 at 19.14:1 contrast (WCAG AA passes).

Color values

HEX	#EFFF5F
RGB	rgb(239, 255, 95)
HSL	hsl(66, 100%, 69%)
HSV	hsv(66, 63%, 100%)
CMYK	cmyk(6.3%, 0%, 62.7%, 0%)
CIE-LAB	lab(96.29, -25.21, 72.01)
CIE-LCH	lch(96.29, 76.30, 109.30°)
OKLab	oklab(95.93% -0.0752 0.1636)
OKLCH	oklch(95.93% 0.18 114.7)
XYZ	xyz(73.4239, 90.6982, 24.4629)
Luminance	0.9070 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFF5F #6F5FFF

analogous

#FFBF5F #EFFF5F #9FFF5F

triadic

#EFFF5F #5FEFFF #FF5FEF

tetradic

#EFFF5F #5FFFBF #6F5FFF #FF5F9F

square

#EFFF5F #5FFFBF #6F5FFF #FF5F9F

split-complementary

#EFFF5F #5F9FFF #BF5FFF

monochromatic

#CDE400 #E9FF22 #EFFF5F #F5FF9C #FBFFD9

Accessibility & contrast

On white

1.10

#EFFF5F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.14

#EFFF5F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFF5F

19.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFF5F	#FFFFFF	#000000	##000000
##EFFF5F	1.00	1.10	19.14	19.14
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.14	21.00	1.00	1.00
##000000	19.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF34A

Deuteranopia (green-blind)

#FFF66A

Tritanopia (blue-blind)

#FDF1DE

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #efff5f;
/* rgb */ color: rgb(239, 255, 95);
/* oklch */ color: oklch(95.9% 0.180 114.7);

Tailwind

colors: {
  custom: {
    50: '#f7ff93',
    500: '#efff5f',
    950: '#000000',
  },
}

SCSS

$custom: #efff5f;
$custom-light: #f7ff93;
$custom-dark: #000000;

JSON

{
  "hex": "#efff5f",
  "rgb": {
    "r": 239,
    "g": 255,
    "b": 95
  },
  "hsl": {
    "h": 66,
    "s": 100,
    "l": 68.627
  },
  "oklch": {
    "l": 0.9593,
    "c": 0.18001,
    "h": 114.7
  },
  "luminance": 0.90697
}

Semantic roles & 50–950 ramp

primary

#EFFF5F

secondary

#3B29D9

accent

#00E617

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#18170E

muted

#86857F

Preview Lab

Preview with #EFFF5F

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

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