#ECF39B#ECF39B

#ECF39B is a very light, moderate yellow. Relative luminance 0.843; OKLCH L 93.9% C 0.111 H 112.2°. Best body text is #000000 at 17.86:1 contrast (WCAG AA passes).

Color values

HEX	#ECF39B
RGB	rgb(236, 243, 155)
HSL	hsl(65, 79%, 78%)
HSV	hsv(65, 36%, 95%)
CMYK	cmyk(2.9%, 0%, 36.2%, 4.7%)
CIE-LAB	lab(93.58, -15.36, 41.68)
CIE-LCH	lch(93.58, 44.43, 110.23°)
OKLab	oklab(93.93% -0.0418 0.1024)
OKLCH	oklch(93.93% 0.111 112.2)
XYZ	xyz(72.5596, 84.3016, 43.4534)
Luminance	0.8430 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF39B #A29BF3

analogous

#F3CE9B #ECF39B #C0F39B

triadic

#ECF39B #9BECF3 #F39BEC

tetradic

#ECF39B #9BF3CE #A29BF3 #F39BC0

square

#ECF39B #9BF3CE #A29BF3 #F39BC0

split-complementary

#ECF39B #9BC0F3 #CE9BF3

monochromatic

#D7E62E #E2EC64 #ECF39B #F6FAD2 #FAFCE4

Accessibility & contrast

On white

1.18

#ECF39B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.86

#ECF39B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF39B

17.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF39B	#FFFFFF	#000000	##000000
##ECF39B	1.00	1.18	17.86	17.86
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.86	21.00	1.00	1.00
##000000	17.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEB95

Deuteranopia (green-blind)

#FFEE9F

Tritanopia (blue-blind)

#F6E9DD

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #ecf39b;
/* rgb */ color: rgb(236, 243, 155);
/* oklch */ color: oklch(93.9% 0.111 112.2);

Tailwind

colors: {
  custom: {
    50: '#f3f7b9',
    500: '#ecf39b',
    950: '#000000',
  },
}

SCSS

$custom: #ecf39b;
$custom-light: #f3f7b9;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf39b",
  "rgb": {
    "r": 236,
    "g": 243,
    "b": 155
  },
  "hsl": {
    "h": 64.773,
    "s": 78.571,
    "l": 78.039
  },
  "oklch": {
    "l": 0.93927,
    "c": 0.11056,
    "h": 112.2
  },
  "luminance": 0.84301
}

Semantic roles & 50–950 ramp

primary

#ECF39B

secondary

#6A61D1

accent

#0BDB1B

background

#FFFFFD

surface

#FEFEF8

border

#D6D6D1

text

#171711

muted

#858581

Preview Lab

Preview with #ECF39B

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

Preview Lab → · Contrast checker → · Palette generator →