#ECF553#ECF553

#ECF553 is a very light, vivid yellow. Relative luminance 0.838; OKLCH L 93.5% C 0.179 H 112.5°. Best body text is #000000 at 17.75:1 contrast (WCAG AA passes).

Color values

HEX	#ECF553
RGB	rgb(236, 245, 83)
HSL	hsl(63, 89%, 64%)
HSV	hsv(63, 66%, 96%)
CMYK	cmyk(3.7%, 0%, 66.1%, 3.9%)
CIE-LAB	lab(93.35, -22.37, 73.48)
CIE-LCH	lch(93.35, 76.81, 106.93°)
OKLab	oklab(93.5% -0.0682 0.165)
OKLCH	oklch(93.5% 0.179 112.5)
XYZ	xyz(68.8078, 83.7637, 20.7253)
Luminance	0.8376 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF553 #5C53F5

analogous

#F5AD53 #ECF553 #9BF553

triadic

#ECF553 #53ECF5 #F553EC

tetradic

#ECF553 #53F5AD #5C53F5 #F5539B

square

#ECF553 #53F5AD #5C53F5 #F5539B

split-complementary

#ECF553 #539BF5 #AD53F5

monochromatic

#B8C20B #E6F219 #ECF553 #F2F88D #F9FCC7

Accessibility & contrast

On white

1.18

#ECF553 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.75

#ECF553 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF553

17.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF553	#FFFFFF	#000000	##000000
##ECF553	1.00	1.18	17.75	17.75
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.75	21.00	1.00	1.00
##000000	17.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA3B

Deuteranopia (green-blind)

#FFEE5E

Tritanopia (blue-blind)

#FBE7D4

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #ecf553;
/* rgb */ color: rgb(236, 245, 83);
/* oklch */ color: oklch(93.5% 0.179 112.5);

Tailwind

colors: {
  custom: {
    50: '#f6f88c',
    500: '#ecf553',
    950: '#000000',
  },
}

SCSS

$custom: #ecf553;
$custom-light: #f6f88c;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf553",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 83
  },
  "hsl": {
    "h": 63.333,
    "s": 89.011,
    "l": 64.314
  },
  "oklch": {
    "l": 0.93496,
    "c": 0.17854,
    "h": 112.5
  },
  "luminance": 0.83762
}

Semantic roles & 50–950 ramp

primary

#ECF553

secondary

#352DC0

accent

#00E60D

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECF553

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

Preview Lab → · Contrast checker → · Palette generator →