#ECFE5B#ECFE5B

#ECFE5B is a very light, vivid yellow. Relative luminance 0.895; OKLCH L 95.5% C 0.183 H 115.3°. Best body text is #000000 at 18.89:1 contrast (WCAG AA passes).

Color values

HEX	#ECFE5B
RGB	rgb(236, 254, 91)
HSL	hsl(67, 99%, 68%)
HSV	hsv(67, 64%, 100%)
CMYK	cmyk(7.1%, 0%, 64.2%, 0.4%)
CIE-LAB	lab(95.78, -26.17, 72.96)
CIE-LCH	lch(95.78, 77.51, 109.73°)
OKLab	oklab(95.46% -0.0781 0.1651)
OKLCH	oklch(95.46% 0.183 115.3)
XYZ	xyz(71.9239, 89.4729, 23.3766)
Luminance	0.8947 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFE5B #6D5BFE

analogous

#FEBF5B #ECFE5B #9AFE5B

triadic

#ECFE5B #5BECFE #FE5BEC

tetradic

#ECFE5B #5BFEBF #6D5BFE #FE5B9A

square

#ECFE5B #5BFEBF #6D5BFE #FE5B9A

split-complementary

#ECFE5B #5B9AFE #BF5BFE

monochromatic

#C5DD01 #E5FE1E #ECFE5B #F3FE98 #FAFFD5

Accessibility & contrast

On white

1.11

#ECFE5B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.89

#ECFE5B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFE5B

18.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFE5B	#FFFFFF	#000000	##000000
##ECFE5B	1.00	1.11	18.89	18.89
#FFFFFF	1.11	1.00	21.00	21.00
#000000	18.89	21.00	1.00	1.00
##000000	18.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF245

Deuteranopia (green-blind)

#FFF466

Tritanopia (blue-blind)

#FAF0DD

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #ecfe5b;
/* rgb */ color: rgb(236, 254, 91);
/* oklch */ color: oklch(95.5% 0.183 115.3);

Tailwind

colors: {
  custom: {
    50: '#f5fe91',
    500: '#ecfe5b',
    950: '#000000',
  },
}

SCSS

$custom: #ecfe5b;
$custom-light: #f5fe91;
$custom-dark: #000000;

JSON

{
  "hex": "#ecfe5b",
  "rgb": {
    "r": 236,
    "g": 254,
    "b": 91
  },
  "hsl": {
    "h": 66.626,
    "s": 98.788,
    "l": 67.647
  },
  "oklch": {
    "l": 0.9546,
    "c": 0.18261,
    "h": 115.3
  },
  "luminance": 0.89472
}

Semantic roles & 50–950 ramp

primary

#ECFE5B

secondary

#3A27D6

accent

#00E619

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECFE5B

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

Preview Lab → · Contrast checker → · Palette generator →