#313B8D#313B8D

#313B8D is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.4% C 0.135 H 273.3°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#313B8D
RGB	rgb(49, 59, 141)
HSL	hsl(233, 48%, 37%)
HSV	hsv(233, 65%, 55%)
CMYK	cmyk(65.2%, 58.2%, 0%, 44.7%)
CIE-LAB	lab(28.65, 23.29, -46.92)
CIE-LCH	lch(28.65, 52.39, 296.40°)
OKLab	oklab(39.4% 0.0077 -0.1349)
OKLCH	oklch(39.4% 0.135 273.3)
XYZ	xyz(7.6367, 5.7033, 25.8925)
Luminance	0.0570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B8D #8D8331

analogous

#31698D #313B8D #55318D

triadic

#313B8D #8D313B #3B8D31

tetradic

#313B8D #8D3169 #8D8331 #318D55

square

#313B8D #8D3169 #8D8331 #318D55

split-complementary

#313B8D #8D5531 #698D31

monochromatic

#111532 #212860 #313B8D #414EBA #6C77CC

Accessibility & contrast

On white

9.81

#313B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#313B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B8D

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B8D	#FFFFFF	#000000	##FFFFFF
##313B8D	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004890

Deuteranopia (green-blind)

#00408B

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313b8d;
/* rgb */ color: rgb(49, 59, 141);
/* oklch */ color: oklch(39.4% 0.135 273.3);

Tailwind

colors: {
  custom: {
    50: '#7470af',
    500: '#313b8d',
    950: '#000000',
  },
}

SCSS

$custom: #313b8d;
$custom-light: #7470af;
$custom-dark: #000000;

JSON

{
  "hex": "#313b8d",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 141
  },
  "hsl": {
    "h": 233.478,
    "s": 48.421,
    "l": 37.255
  },
  "oklch": {
    "l": 0.39403,
    "c": 0.13512,
    "h": 273.3
  },
  "luminance": 0.05704
}

Semantic roles & 50–950 ramp

primary

#313B8D

secondary

#B4AB66

accent

#C950D8

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313B8D

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

Preview Lab → · Contrast checker → · Palette generator →