#ECF591#ECF591

#ECF591 is a very light, vivid yellow. Relative luminance 0.852; OKLCH L 94.2% C 0.124 H 113.0°. Best body text is #000000 at 18.04:1 contrast (WCAG AA passes).

Color values

HEX	#ECF591
RGB	rgb(236, 245, 145)
HSL	hsl(65, 83%, 76%)
HSV	hsv(65, 41%, 96%)
CMYK	cmyk(3.7%, 0%, 40.8%, 3.9%)
CIE-LAB	lab(93.96, -17.43, 47.05)
CIE-LCH	lch(93.96, 50.18, 110.33°)
OKLab	oklab(94.18% -0.0484 0.1141)
OKLCH	oklch(94.18% 0.124 113)
XYZ	xyz(72.3561, 85.1831, 39.4129)
Luminance	0.8518 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF591 #9A91F5

analogous

#F5CC91 #ECF591 #BAF591

triadic

#ECF591 #91ECF5 #F591EC

tetradic

#ECF591 #91F5CC #9A91F5 #F591BA

square

#ECF591 #91F5CC #9A91F5 #F591BA

split-complementary

#ECF591 #91BAF5 #CC91F5

monochromatic

#D9EB21 #E2F059 #ECF591 #F6FAC9 #FAFCE3

Accessibility & contrast

On white

1.16

#ECF591 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.04

#ECF591 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF591

18.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF591	#FFFFFF	#000000	##000000
##ECF591	1.00	1.16	18.04	18.04
#FFFFFF	1.16	1.00	21.00	21.00
#000000	18.04	21.00	1.00	1.00
##000000	18.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC89

Deuteranopia (green-blind)

#FFEF96

Tritanopia (blue-blind)

#F7EADD

Achromatopsia (no color)

#EEEEEE

Design tokens & code

CSS

--color: #ecf591;
/* rgb */ color: rgb(236, 245, 145);
/* oklch */ color: oklch(94.2% 0.124 113.0);

Tailwind

colors: {
  custom: {
    50: '#f3f8b3',
    500: '#ecf591',
    950: '#000000',
  },
}

SCSS

$custom: #ecf591;
$custom-light: #f3f8b3;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf591",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 145
  },
  "hsl": {
    "h": 65.4,
    "s": 83.333,
    "l": 76.471
  },
  "oklch": {
    "l": 0.94184,
    "c": 0.12396,
    "h": 113
  },
  "luminance": 0.85182
}

Semantic roles & 50–950 ramp

primary

#ECF591

secondary

#6257D3

accent

#06E019

background

#FFFFFD

surface

#FEFEF8

border

#D6D6D1

text

#171711

muted

#858581

Preview Lab

Preview with #ECF591

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

Preview Lab → · Contrast checker → · Palette generator →