#3951AB#3951AB

#3951AB is a mid, vivid blue. Relative luminance 0.097; OKLCH L 46.7% C 0.147 H 268.9°. Best body text is #FFFFFF at 7.15:1 contrast (WCAG AA passes).

Color values

HEX	#3951AB
RGB	rgb(57, 81, 171)
HSL	hsl(227, 50%, 45%)
HSV	hsv(227, 67%, 67%)
CMYK	cmyk(66.7%, 52.6%, 0%, 32.9%)
CIE-LAB	lab(37.29, 20.99, -51.08)
CIE-LCH	lch(37.29, 55.22, 292.34°)
OKLab	oklab(46.72% -0.0029 -0.1466)
OKLCH	oklch(46.72% 0.147 268.9)
XYZ	xyz(11.9779, 9.6939, 39.7601)
Luminance	0.0969 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3951AB #AB9339

analogous

#398AAB #3951AB #5A39AB

triadic

#3951AB #AB3951 #51AB39

tetradic

#3951AB #AB398A #AB9339 #39AB5A

square

#3951AB #AB398A #AB9339 #39AB5A

split-complementary

#3951AB #AB5A39 #8AAB39

monochromatic

#1A264F #2A3B7D #3951AB #5971C8 #8798D7

Accessibility & contrast

On white

7.15

#3951AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#3951AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3951AB

7.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3951AB	#FFFFFF	#000000	##FFFFFF
##3951AB	1.00	7.15	2.94	7.15
#FFFFFF	7.15	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#185DAE

Deuteranopia (green-blind)

#0053A9

Tritanopia (blue-blind)

#006676

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3951ab;
/* rgb */ color: rgb(57, 81, 171);
/* oklch */ color: oklch(46.7% 0.147 268.9);

Tailwind

colors: {
  custom: {
    50: '#7c81c5',
    500: '#3951ab',
    950: '#000000',
  },
}

SCSS

$custom: #3951ab;
$custom-light: #7c81c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3951ab",
  "rgb": {
    "r": 57,
    "g": 81,
    "b": 171
  },
  "hsl": {
    "h": 227.368,
    "s": 50,
    "l": 44.706
  },
  "oklch": {
    "l": 0.46716,
    "c": 0.14667,
    "h": 268.9
  },
  "luminance": 0.09695
}

Semantic roles & 50–950 ramp

primary

#3951AB

secondary

#C1B37F

accent

#BC4EDA

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3951AB

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

Preview Lab → · Contrast checker → · Palette generator →