#ECFB57#ECFB57

#ECFB57 is a very light, vivid yellow. Relative luminance 0.875; OKLCH L 94.8% C 0.182 H 114.4°. Best body text is #000000 at 18.50:1 contrast (WCAG AA passes).

Color values

HEX	#ECFB57
RGB	rgb(236, 251, 87)
HSL	hsl(65, 95%, 66%)
HSV	hsv(65, 65%, 98%)
CMYK	cmyk(6%, 0%, 65.3%, 1.6%)
CIE-LAB	lab(94.96, -24.99, 73.63)
CIE-LCH	lch(94.96, 77.76, 108.75°)
OKLab	oklab(94.79% -0.0752 0.1659)
OKLCH	oklch(94.79% 0.182 114.4)
XYZ	xyz(70.8114, 87.5166, 22.1771)
Luminance	0.8751 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFB57 #6657FB

analogous

#FBB857 #ECFB57 #9AFB57

triadic

#ECFB57 #57ECFB #FB57EC

tetradic

#ECFB57 #57FBB8 #6657FB #FB579A

square

#ECFB57 #57FBB8 #6657FB #FB579A

split-complementary

#ECFB57 #579AFB #B857FB

monochromatic

#C0D305 #E5FA1B #ECFB57 #F3FC93 #FAFECF

Accessibility & contrast

On white

1.13

#ECFB57 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.50

#ECFB57 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFB57

18.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFB57	#FFFFFF	#000000	##000000
##ECFB57	1.00	1.13	18.50	18.50
#FFFFFF	1.13	1.00	21.00	21.00
#000000	18.50	21.00	1.00	1.00
##000000	18.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEF40

Deuteranopia (green-blind)

#FFF263

Tritanopia (blue-blind)

#FBEDDA

Achromatopsia (no color)

#F0F0F0

Design tokens & code

CSS

--color: #ecfb57;
/* rgb */ color: rgb(236, 251, 87);
/* oklch */ color: oklch(94.8% 0.182 114.4);

Tailwind

colors: {
  custom: {
    50: '#f5fc8e',
    500: '#ecfb57',
    950: '#000000',
  },
}

SCSS

$custom: #ecfb57;
$custom-light: #f5fc8e;
$custom-dark: #000000;

JSON

{
  "hex": "#ecfb57",
  "rgb": {
    "r": 236,
    "g": 251,
    "b": 87
  },
  "hsl": {
    "h": 65.488,
    "s": 95.349,
    "l": 66.275
  },
  "oklch": {
    "l": 0.94793,
    "c": 0.18214,
    "h": 114.4
  },
  "luminance": 0.87515
}

Semantic roles & 50–950 ramp

primary

#ECFB57

secondary

#3829CD

accent

#00E615

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECFB57

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

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