#ECF556#ECF556

#ECF556 is a very light, vivid yellow. Relative luminance 0.838; OKLCH L 93.5% C 0.177 H 112.5°. Best body text is #000000 at 17.76:1 contrast (WCAG AA passes).

Color values

HEX	#ECF556
RGB	rgb(236, 245, 86)
HSL	hsl(63, 89%, 65%)
HSV	hsv(63, 65%, 96%)
CMYK	cmyk(3.7%, 0%, 64.9%, 3.9%)
CIE-LAB	lab(93.37, -22.20, 72.38)
CIE-LCH	lch(93.37, 75.71, 107.05°)
OKLab	oklab(93.52% -0.0675 0.1631)
OKLCH	oklch(93.52% 0.177 112.5)
XYZ	xyz(68.9262, 83.8111, 21.3486)
Luminance	0.8381 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF556 #5F56F5

analogous

#F5AE56 #ECF556 #9DF556

triadic

#ECF556 #56ECF5 #F556EC

tetradic

#ECF556 #56F5AE #5F56F5 #F5569D

square

#ECF556 #56F5AE #5F56F5 #F5569D

split-complementary

#ECF556 #569DF5 #AE56F5

monochromatic

#BAC50C #E6F21C #ECF556 #F2F890 #F9FCCA

Accessibility & contrast

On white

1.18

#ECF556 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.76

#ECF556 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF556

17.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF556	#FFFFFF	#000000	##000000
##ECF556	1.00	1.18	17.76	17.76
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.76	21.00	1.00	1.00
##000000	17.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA40

Deuteranopia (green-blind)

#FFEE61

Tritanopia (blue-blind)

#FBE7D5

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #ecf556;
/* rgb */ color: rgb(236, 245, 86);
/* oklch */ color: oklch(93.5% 0.177 112.5);

Tailwind

colors: {
  custom: {
    50: '#f5f88d',
    500: '#ecf556',
    950: '#000000',
  },
}

SCSS

$custom: #ecf556;
$custom-light: #f5f88d;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf556",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 86
  },
  "hsl": {
    "h": 63.396,
    "s": 88.827,
    "l": 64.902
  },
  "oklch": {
    "l": 0.93519,
    "c": 0.17651,
    "h": 112.5
  },
  "luminance": 0.8381
}

Semantic roles & 50–950 ramp

primary

#ECF556

secondary

#362DC2

accent

#00E50D

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECF556

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

Preview Lab → · Contrast checker → · Palette generator →