#313D8B#313D8B

#313D8B is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.6% C 0.130 H 272.5°. Best body text is #FFFFFF at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#313D8B
RGB	rgb(49, 61, 139)
HSL	hsl(232, 48%, 37%)
HSV	hsv(232, 65%, 55%)
CMYK	cmyk(64.7%, 56.1%, 0%, 45.5%)
CIE-LAB	lab(29.04, 21.21, -45.06)
CIE-LCH	lch(29.04, 49.80, 295.21°)
OKLab	oklab(39.65% 0.0056 -0.1294)
OKLCH	oklch(39.65% 0.13 272.5)
XYZ	xyz(7.5940, 5.8539, 25.1508)
Luminance	0.0585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313D8B #8B7F31

analogous

#316A8B #313D8B #52318B

triadic

#313D8B #8B313D #3D8B31

tetradic

#313D8B #8B316A #8B7F31 #318B52

square

#313D8B #8B316A #8B7F31 #318B52

split-complementary

#313D8B #8B5231 #6A8B31

monochromatic

#111531 #21295E #313D8B #4151B8 #6B78CB

Accessibility & contrast

On white

9.67

#313D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#313D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313D8B

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313D8B	#FFFFFF	#000000	##FFFFFF
##313D8B	1.00	9.67	2.17	9.67
#FFFFFF	9.67	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03498E

Deuteranopia (green-blind)

#004189

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313d8b;
/* rgb */ color: rgb(49, 61, 139);
/* oklch */ color: oklch(39.6% 0.130 272.5);

Tailwind

colors: {
  custom: {
    50: '#7372ad',
    500: '#313d8b',
    950: '#000000',
  },
}

SCSS

$custom: #313d8b;
$custom-light: #7372ad;
$custom-dark: #000000;

JSON

{
  "hex": "#313d8b",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 139
  },
  "hsl": {
    "h": 232,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39646,
    "c": 0.12951,
    "h": 272.5
  },
  "luminance": 0.05855
}

Semantic roles & 50–950 ramp

primary

#313D8B

secondary

#B2A865

accent

#C550D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313D8B

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

Preview Lab → · Contrast checker → · Palette generator →