#313D9B#313D9B

#313D9B is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.152 H 272.2°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#313D9B
RGB	rgb(49, 61, 155)
HSL	hsl(233, 52%, 40%)
HSV	hsv(233, 68%, 61%)
CMYK	cmyk(68.4%, 60.6%, 0%, 39.2%)
CIE-LAB	lab(30.29, 27.08, -52.83)
CIE-LCH	lch(30.29, 59.36, 297.14°)
OKLab	oklab(40.98% 0.006 -0.1522)
OKLCH	oklch(40.98% 0.152 272.2)
XYZ	xyz(8.8498, 6.3562, 31.7645)
Luminance	0.0636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D9B #9B8F31

analogous

#31729B #313D9B #5A319B

triadic

#313D9B #9B313D #3D9B31

tetradic

#313D9B #9B3172 #9B8F31 #319B5A

square

#313D9B #9B3172 #9B8F31 #319B5A

split-complementary

#313D9B #9B5A31 #729B31

monochromatic

#14183E #222B6D #313D9B #4553C4 #737ED3

Accessibility & contrast

On white

9.25

#313D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#313D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D9B

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D9B	#FFFFFF	#000000	##FFFFFF
##313D9B	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9E

Deuteranopia (green-blind)

#004399

Tritanopia (blue-blind)

#005466

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #313d9b;
/* rgb */ color: rgb(49, 61, 155);
/* oklch */ color: oklch(41.0% 0.152 272.2);

Tailwind

colors: {
  custom: {
    50: '#7772b9',
    500: '#313d9b',
    950: '#000000',
  },
}

SCSS

$custom: #313d9b;
$custom-light: #7772b9;
$custom-dark: #000000;

JSON

{
  "hex": "#313d9b",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 155
  },
  "hsl": {
    "h": 233.208,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.40975,
    "c": 0.15236,
    "h": 272.2
  },
  "luminance": 0.06357
}

Semantic roles & 50–950 ramp

primary

#313D9B

secondary

#BBB26D

accent

#CB4CDB

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #313D9B

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

Preview Lab → · Contrast checker → · Palette generator →