#ECF550#ECF550

#ECF550 is a very light, vivid yellow. Relative luminance 0.837; OKLCH L 93.5% C 0.180 H 112.5°. Best body text is #000000 at 17.74:1 contrast (WCAG AA passes).

Color values

HEX	#ECF550
RGB	rgb(236, 245, 80)
HSL	hsl(63, 89%, 64%)
HSV	hsv(63, 67%, 96%)
CMYK	cmyk(3.7%, 0%, 67.3%, 3.9%)
CIE-LAB	lab(93.33, -22.53, 74.56)
CIE-LCH	lch(93.33, 77.89, 106.81°)
OKLab	oklab(93.47% -0.069 0.1668)
OKLCH	oklch(93.47% 0.181 112.5)
XYZ	xyz(68.6945, 83.7184, 20.1285)
Luminance	0.8372 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF550 #5950F5

analogous

#F5AB50 #ECF550 #99F550

triadic

#ECF550 #50ECF5 #F550EC

tetradic

#ECF550 #50F5AB #5950F5 #F55099

square

#ECF550 #50F5AB #5950F5 #F55099

split-complementary

#ECF550 #5099F5 #AB50F5

monochromatic

#B6C00B #E6F216 #ECF550 #F2F88A #F9FCC4

Accessibility & contrast

On white

1.18

#ECF550 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.74

#ECF550 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF550

17.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF550	#FFFFFF	#000000	##000000
##ECF550	1.00	1.18	17.74	17.74
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.74	21.00	1.00	1.00
##000000	17.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA36

Deuteranopia (green-blind)

#FFEE5C

Tritanopia (blue-blind)

#FBE7D4

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #ecf550;
/* rgb */ color: rgb(236, 245, 80);
/* oklch */ color: oklch(93.5% 0.180 112.5);

Tailwind

colors: {
  custom: {
    50: '#f6f88a',
    500: '#ecf550',
    950: '#000000',
  },
}

SCSS

$custom: #ecf550;
$custom-light: #f6f88a;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf550",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 80
  },
  "hsl": {
    "h": 63.273,
    "s": 89.189,
    "l": 63.725
  },
  "oklch": {
    "l": 0.93474,
    "c": 0.1805,
    "h": 112.5
  },
  "luminance": 0.83717
}

Semantic roles & 50–950 ramp

primary

#ECF550

secondary

#342CBD

accent

#00E60D

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170C

muted

#86857F

Preview Lab

Preview with #ECF550

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

Preview Lab → · Contrast checker → · Palette generator →