#ECFB55#ECFB55

#ECFB55 is a very light, vivid yellow. Relative luminance 0.875; OKLCH L 94.8% C 0.183 H 114.4°. Best body text is #000000 at 18.50:1 contrast (WCAG AA passes).

Color values

HEX	#ECFB55
RGB	rgb(236, 251, 85)
HSL	hsl(65, 95%, 66%)
HSV	hsv(65, 66%, 98%)
CMYK	cmyk(6%, 0%, 66.1%, 1.6%)
CIE-LAB	lab(94.94, -25.11, 74.36)
CIE-LCH	lch(94.94, 78.49, 108.65°)
OKLab	oklab(94.78% -0.0757 0.1672)
OKLCH	oklch(94.78% 0.183 114.4)
XYZ	xyz(70.7308, 87.4844, 21.7527)
Luminance	0.8748 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFB55 #6455FB

analogous

#FBB755 #ECFB55 #99FB55

triadic

#ECFB55 #55ECFB #FB55EC

tetradic

#ECFB55 #55FBB7 #6455FB #FB5599

square

#ECFB55 #55FBB7 #6455FB #FB5599

split-complementary

#ECFB55 #5599FB #B755FB

monochromatic

#BED105 #E5FA19 #ECFB55 #F3FC91 #F9FECD

Accessibility & contrast

On white

1.14

#ECFB55 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.50

#ECFB55 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFB55

18.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFB55	#FFFFFF	#000000	##000000
##ECFB55	1.00	1.14	18.50	18.50
#FFFFFF	1.14	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)

#FFEF3C

Deuteranopia (green-blind)

#FFF261

Tritanopia (blue-blind)

#FBEDDA

Achromatopsia (no color)

#F0F0F0

Design tokens & code

CSS

--color: #ecfb55;
/* rgb */ color: rgb(236, 251, 85);
/* oklch */ color: oklch(94.8% 0.183 114.4);

Tailwind

colors: {
  custom: {
    50: '#f6fc8d',
    500: '#ecfb55',
    950: '#000000',
  },
}

SCSS

$custom: #ecfb55;
$custom-light: #f6fc8d;
$custom-dark: #000000;

JSON

{
  "hex": "#ecfb55",
  "rgb": {
    "r": 236,
    "g": 251,
    "b": 85
  },
  "hsl": {
    "h": 65.422,
    "s": 95.402,
    "l": 65.882
  },
  "oklch": {
    "l": 0.94778,
    "c": 0.18349,
    "h": 114.4
  },
  "luminance": 0.87483
}

Semantic roles & 50–950 ramp

primary

#ECFB55

secondary

#3729CC

accent

#00E615

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECFB55

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

Preview Lab → · Contrast checker → · Palette generator →