#313E8B#313E8B

#313E8B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.9% C 0.128 H 272.1°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#313E8B
RGB	rgb(49, 62, 139)
HSL	hsl(231, 48%, 37%)
HSV	hsv(231, 65%, 55%)
CMYK	cmyk(64.7%, 55.4%, 0%, 45.5%)
CIE-LAB	lab(29.32, 20.53, -44.61)
CIE-LCH	lch(29.32, 49.11, 294.72°)
OKLab	oklab(39.85% 0.0046 -0.1281)
OKLCH	oklch(39.85% 0.128 272.1)
XYZ	xyz(7.6479, 5.9616, 25.1688)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313E8B #8B7E31

analogous

#316B8B #313E8B #51318B

triadic

#313E8B #8B313E #3E8B31

tetradic

#313E8B #8B316B #8B7E31 #318B51

square

#313E8B #8B316B #8B7E31 #318B51

split-complementary

#313E8B #8B5131 #6B8B31

monochromatic

#111631 #212A5E #313E8B #4152B8 #6B79CB

Accessibility & contrast

On white

9.58

#313E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#313E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313E8B

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313E8B	#FFFFFF	#000000	##FFFFFF
##313E8B	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08498E

Deuteranopia (green-blind)

#004189

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #313e8b;
/* rgb */ color: rgb(49, 62, 139);
/* oklch */ color: oklch(39.9% 0.128 272.1);

Tailwind

colors: {
  custom: {
    50: '#7373ad',
    500: '#313e8b',
    950: '#000000',
  },
}

SCSS

$custom: #313e8b;
$custom-light: #7373ad;
$custom-dark: #000000;

JSON

{
  "hex": "#313e8b",
  "rgb": {
    "r": 49,
    "g": 62,
    "b": 139
  },
  "hsl": {
    "h": 231.333,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39852,
    "c": 0.12815,
    "h": 272.1
  },
  "luminance": 0.05962
}

Semantic roles & 50–950 ramp

primary

#313E8B

secondary

#B2A765

accent

#C450D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090810

muted

#7B7B7F

Preview Lab

Preview with #313E8B

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

Preview Lab → · Contrast checker → · Palette generator →