#313B8A#313B8A

#313B8A is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.2% C 0.131 H 273.3°. Best body text is #FFFFFF at 9.89:1 contrast (WCAG AA passes).

Color values

HEX	#313B8A
RGB	rgb(49, 59, 138)
HSL	hsl(233, 48%, 37%)
HSV	hsv(233, 64%, 54%)
CMYK	cmyk(64.5%, 57.2%, 0%, 45.9%)
CIE-LAB	lab(28.42, 22.19, -45.44)
CIE-LCH	lch(28.42, 50.57, 296.03°)
OKLab	oklab(39.16% 0.0076 -0.1305)
OKLCH	oklch(39.16% 0.131 273.3)
XYZ	xyz(7.4165, 5.6153, 24.7328)
Luminance	0.0562 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B8A #8A8031

analogous

#31688A #313B8A #54318A

triadic

#313B8A #8A313B #3B8A31

tetradic

#313B8A #8A3168 #8A8031 #318A54

square

#313B8A #8A3168 #8A8031 #318A54

split-complementary

#313B8A #8A5431 #688A31

monochromatic

#111430 #21285D #313B8A #414EB7 #6B76CA

Accessibility & contrast

On white

9.89

#313B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#313B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B8A

9.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B8A	#FFFFFF	#000000	##FFFFFF
##313B8A	1.00	9.89	2.12	9.89
#FFFFFF	9.89	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478D

Deuteranopia (green-blind)

#003F88

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313b8a;
/* rgb */ color: rgb(49, 59, 138);
/* oklch */ color: oklch(39.2% 0.131 273.3);

Tailwind

colors: {
  custom: {
    50: '#7370ad',
    500: '#313b8a',
    950: '#000000',
  },
}

SCSS

$custom: #313b8a;
$custom-light: #7370ad;
$custom-dark: #000000;

JSON

{
  "hex": "#313b8a",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 138
  },
  "hsl": {
    "h": 233.258,
    "s": 47.594,
    "l": 36.667
  },
  "oklch": {
    "l": 0.39157,
    "c": 0.13077,
    "h": 273.3
  },
  "luminance": 0.05616
}

Semantic roles & 50–950 ramp

primary

#313B8A

secondary

#B2A965

accent

#C851D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313B8A

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

Preview Lab → · Contrast checker → · Palette generator →