#ECF45B#ECF45B

#ECF45B is a very light, vivid yellow. Relative luminance 0.833; OKLCH L 93.3% C 0.172 H 112.1°. Best body text is #000000 at 17.66:1 contrast (WCAG AA passes).

Color values

HEX	#ECF45B
RGB	rgb(236, 244, 91)
HSL	hsl(63, 87%, 66%)
HSV	hsv(63, 63%, 96%)
CMYK	cmyk(3.3%, 0%, 62.7%, 4.3%)
CIE-LAB	lab(93.14, -21.43, 70.20)
CIE-LCH	lch(93.14, 73.40, 106.97°)
OKLab	oklab(93.35% -0.0648 0.1593)
OKLCH	oklch(93.35% 0.172 112.1)
XYZ	xyz(68.8330, 83.2911, 22.3463)
Luminance	0.8329 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF45B #635BF4

analogous

#F4AF5B #ECF45B #9FF45B

triadic

#ECF45B #5BECF4 #F45BEC

tetradic

#ECF45B #5BF4AF #635BF4 #F45B9F

square

#ECF45B #5BF4AF #635BF4 #F45B9F

split-complementary

#ECF45B #5B9FF4 #AF5BF4

monochromatic

#BEC70D #E5F022 #ECF45B #F3F894 #F9FCCE

Accessibility & contrast

On white

1.19

#ECF45B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.66

#ECF45B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF45B

17.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF45B	#FFFFFF	#000000	##000000
##ECF45B	1.00	1.19	17.66	17.66
#FFFFFF	1.19	1.00	21.00	21.00
#000000	17.66	21.00	1.00	1.00
##000000	17.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE947

Deuteranopia (green-blind)

#FFED65

Tritanopia (blue-blind)

#FBE6D4

Achromatopsia (no color)

#EBEBEB

Design tokens & code

CSS

--color: #ecf45b;
/* rgb */ color: rgb(236, 244, 91);
/* oklch */ color: oklch(93.3% 0.172 112.1);

Tailwind

colors: {
  custom: {
    50: '#f5f790',
    500: '#ecf45b',
    950: '#000000',
  },
}

SCSS

$custom: #ecf45b;
$custom-light: #f5f790;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf45b",
  "rgb": {
    "r": 236,
    "g": 244,
    "b": 91
  },
  "hsl": {
    "h": 63.137,
    "s": 87.429,
    "l": 65.686
  },
  "oklch": {
    "l": 0.93349,
    "c": 0.17193,
    "h": 112.1
  },
  "luminance": 0.8329
}

Semantic roles & 50–950 ramp

primary

#ECF45B

secondary

#372FC4

accent

#02E40D

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECF45B

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

Preview Lab → · Contrast checker → · Palette generator →