#ECF3FF#ECF3FF

#ECF3FF is a very light, near-neutral blue. Relative luminance 0.892; OKLCH L 96.2% C 0.018 H 261.3°. Best body text is #000000 at 18.83:1 contrast (WCAG AA passes).

Color values

HEX	#ECF3FF
RGB	rgb(236, 243, 255)
HSL	hsl(218, 100%, 96%)
HSV	hsv(218, 7%, 100%)
CMYK	cmyk(7.5%, 4.7%, 0%, 0%)
CIE-LAB	lab(95.64, -0.09, -6.56)
CIE-LCH	lch(95.64, 6.56, 269.20°)
OKLab	oklab(96.24% -0.0027 -0.0176)
OKLCH	oklch(96.24% 0.018 261.3)
XYZ	xyz(84.6890, 89.1534, 107.3349)
Luminance	0.8915 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF3FF #FFF8EC

analogous

#ECFDFF #ECF3FF #EFECFF

triadic

#ECF3FF #FFECF3 #F3FFEC

tetradic

#ECF3FF #FFECFD #FFF8EC #ECFFEF

square

#ECF3FF #FFECFD #FFF8EC #ECFFEF

split-complementary

#ECF3FF #FFEFEC #FDFFEC

monochromatic

#72A6FF #AFCCFF #E0ECFF #E0ECFF #E0ECFF

Accessibility & contrast

On white

1.12

#ECF3FF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.83

#ECF3FF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF3FF

18.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF3FF	#FFFFFF	#000000	##000000
##ECF3FF	1.00	1.12	18.83	18.83
#FFFFFF	1.12	1.00	21.00	21.00
#000000	18.83	21.00	1.00	1.00
##000000	18.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#EFF3FF

Deuteranopia (green-blind)

#EEF2FF

Tritanopia (blue-blind)

#E8F5F7

Achromatopsia (no color)

#F2F2F2

Design tokens & code

CSS

--color: #ecf3ff;
/* rgb */ color: rgb(236, 243, 255);
/* oklch */ color: oklch(96.2% 0.018 261.3);

Tailwind

colors: {
  custom: {
    50: '#f2f7ff',
    500: '#ecf3ff',
    950: '#000000',
  },
}

SCSS

$custom: #ecf3ff;
$custom-light: #f2f7ff;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf3ff",
  "rgb": {
    "r": 236,
    "g": 243,
    "b": 255
  },
  "hsl": {
    "h": 217.895,
    "s": 100,
    "l": 96.275
  },
  "oklch": {
    "l": 0.96238,
    "c": 0.01776,
    "h": 261.3
  },
  "luminance": 0.89154
}

Semantic roles & 50–950 ramp

primary

#ECF3FF

secondary

#EED2A1

accent

#9100E6

background

#FFFFFF

surface

#FEFEFF

border

#D6D6D7

text

#161718

muted

#858586

Preview Lab

Preview with #ECF3FF

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

Preview Lab → · Contrast checker → · Palette generator →