#EFF4FF#EFF4FF

#EFF4FF is a very light, near-neutral blue. Relative luminance 0.903; OKLCH L 96.7% C 0.016 H 266.3°. Best body text is #000000 at 19.05:1 contrast (WCAG AA passes).

Color values

HEX	#EFF4FF
RGB	rgb(239, 244, 255)
HSL	hsl(221, 100%, 97%)
HSV	hsv(221, 6%, 100%)
CMYK	cmyk(6.3%, 4.3%, 0%, 0%)
CIE-LAB	lab(96.11, 0.36, -5.85)
CIE-LCH	lch(96.11, 5.86, 273.55°)
OKLab	oklab(96.66% -0.001 -0.0156)
OKLCH	oklch(96.66% 0.016 266.3)
XYZ	xyz(85.9937, 90.2716, 107.4821)
Luminance	0.9027 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF4FF #FFFAEF

analogous

#EFFCFF #EFF4FF #F2EFFF

triadic

#EFF4FF #FFEFF4 #F4FFEF

tetradic

#EFF4FF #FFEFFC #FFFAEF #EFFFF2

square

#EFF4FF #FFEFFC #FFFAEF #EFFFF2

split-complementary

#EFF4FF #FFF2EF #FCFFEF

monochromatic

#75A0FF #B2CAFF #E0EAFF #E0EAFF #E0EAFF

Accessibility & contrast

On white

1.10

#EFF4FF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.05

#EFF4FF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF4FF

19.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF4FF	#FFFFFF	#000000	##000000
##EFF4FF	1.00	1.10	19.05	19.05
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.05	21.00	1.00	1.00
##000000	19.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#F1F5FF

Deuteranopia (green-blind)

#F0F3FF

Tritanopia (blue-blind)

#ECF6F7

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #eff4ff;
/* rgb */ color: rgb(239, 244, 255);
/* oklch */ color: oklch(96.7% 0.016 266.3);

Tailwind

colors: {
  custom: {
    50: '#f4f7ff',
    500: '#eff4ff',
    950: '#000000',
  },
}

SCSS

$custom: #eff4ff;
$custom-light: #f4f7ff;
$custom-dark: #000000;

JSON

{
  "hex": "#eff4ff",
  "rgb": {
    "r": 239,
    "g": 244,
    "b": 255
  },
  "hsl": {
    "h": 221.25,
    "s": 100,
    "l": 96.863
  },
  "oklch": {
    "l": 0.96656,
    "c": 0.01567,
    "h": 266.3
  },
  "luminance": 0.90272
}

Semantic roles & 50–950 ramp

primary

#EFF4FF

secondary

#EFD7A3

accent

#9E00E6

background

#FFFFFF

surface

#FEFEFF

border

#D6D6D7

text

#171718

muted

#858586

Preview Lab

Preview with #EFF4FF

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

Preview Lab → · Contrast checker → · Palette generator →