#313381#313381

#313381 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.8% C 0.129 H 276.9°. Best body text is #FFFFFF at 10.93:1 contrast (WCAG AA passes).

Color values

HEX	#313381
RGB	rgb(49, 51, 129)
HSL	hsl(239, 45%, 35%)
HSV	hsv(239, 62%, 51%)
CMYK	cmyk(62%, 60.5%, 0%, 49.4%)
CIE-LAB	lab(25.58, 24.32, -44.44)
CIE-LCH	lch(25.58, 50.66, 298.69°)
OKLab	oklab(36.82% 0.0155 -0.1277)
OKLCH	oklch(36.82% 0.129 276.9)
XYZ	xyz(6.4116, 4.6051, 21.3156)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313381 #817F31

analogous

#315B81 #313381 #573181

triadic

#313381 #813133 #338131

tetradic

#313381 #81315B #817F31 #318157

square

#313381 #81315B #817F31 #318157

split-complementary

#313381 #815731 #5B8131

monochromatic

#0F1028 #202155 #313381 #4245AD #6769C5

Accessibility & contrast

On white

10.93

#313381 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#313381 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313381

10.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313381	#FFFFFF	#000000	##FFFFFF
##313381	1.00	10.93	1.92	10.93
#FFFFFF	10.93	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004084

Deuteranopia (green-blind)

#00397F

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #313381;
/* rgb */ color: rgb(49, 51, 129);
/* oklch */ color: oklch(36.8% 0.129 276.9);

Tailwind

colors: {
  custom: {
    50: '#726aa6',
    500: '#313381',
    950: '#000000',
  },
}

SCSS

$custom: #313381;
$custom-light: #726aa6;
$custom-dark: #000000;

JSON

{
  "hex": "#313381",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 129
  },
  "hsl": {
    "h": 238.5,
    "s": 44.944,
    "l": 34.902
  },
  "oklch": {
    "l": 0.36821,
    "c": 0.12862,
    "h": 276.9
  },
  "luminance": 0.04606
}

Semantic roles & 50–950 ramp

primary

#313381

secondary

#ADAB61

accent

#D153D5

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#08060F

muted

#7B7A7F

Preview Lab

Preview with #313381

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

Preview Lab → · Contrast checker → · Palette generator →