#EFF3F9#EFF3F9

#EFF3F9 is a very light, near-neutral blue. Relative luminance 0.893; OKLCH L 96.3% C 0.009 H 258.3°. Best body text is #000000 at 18.86:1 contrast (WCAG AA passes).

Color values

HEX	#EFF3F9
RGB	rgb(239, 243, 249)
HSL	hsl(216, 45%, 96%)
HSV	hsv(216, 4%, 98%)
CMYK	cmyk(4%, 2.4%, 0%, 2.4%)
CIE-LAB	lab(95.70, -0.24, -3.34)
CIE-LCH	lch(95.70, 3.35, 265.93°)
OKLab	oklab(96.28% -0.0018 -0.0089)
OKLCH	oklch(96.28% 0.009 258.3)
XYZ	xyz(84.7429, 89.2911, 102.3746)
Luminance	0.8929 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF3F9 #F9F5EF

analogous

#EFF8F9 #EFF3F9 #F0EFF9

triadic

#EFF3F9 #F9EFF3 #F3F9EF

tetradic

#EFF3F9 #F9EFF8 #F9F5EF #EFF9F0

square

#EFF3F9 #F9EFF8 #F9F5EF #EFF9F0

split-complementary

#EFF3F9 #F9F0EF #F8F9EF

monochromatic

#96B0D8 #C2D2E8 #E9EEF7 #E9EEF7 #E9EEF7

Accessibility & contrast

On white

1.11

#EFF3F9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.86

#EFF3F9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF3F9

18.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF3F9	#FFFFFF	#000000	##000000
##EFF3F9	1.00	1.11	18.86	18.86
#FFFFFF	1.11	1.00	21.00	21.00
#000000	18.86	21.00	1.00	1.00
##000000	18.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#F1F3F9

Deuteranopia (green-blind)

#F0F2F9

Tritanopia (blue-blind)

#EDF4F5

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #eff3f9;
/* rgb */ color: rgb(239, 243, 249);
/* oklch */ color: oklch(96.3% 0.009 258.3);

Tailwind

colors: {
  custom: {
    50: '#f4f7fb',
    500: '#eff3f9',
    950: '#000000',
  },
}

SCSS

$custom: #eff3f9;
$custom-light: #f4f7fb;
$custom-dark: #000000;

JSON

{
  "hex": "#eff3f9",
  "rgb": {
    "r": 239,
    "g": 243,
    "b": 249
  },
  "hsl": {
    "h": 216,
    "s": 45.455,
    "l": 95.686
  },
  "oklch": {
    "l": 0.96284,
    "c": 0.00911,
    "h": 258.3
  },
  "luminance": 0.89291
}

Semantic roles & 50–950 ramp

primary

#EFF3F9

secondary

#D8CAB4

accent

#812DB9

background

#FFFFFF

surface

#FEFEFF

border

#D6D6D7

text

#171717

muted

#858585

Preview Lab

Preview with #EFF3F9

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

Preview Lab → · Contrast checker → · Palette generator →