#313581#313581

#313581 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.2% C 0.126 H 276.1°. Best body text is #FFFFFF at 10.73:1 contrast (WCAG AA passes).

Color values

HEX	#313581
RGB	rgb(49, 53, 129)
HSL	hsl(237, 45%, 35%)
HSV	hsv(237, 62%, 51%)
CMYK	cmyk(62%, 58.9%, 0%, 49.4%)
CIE-LAB	lab(26.11, 22.97, -43.58)
CIE-LCH	lch(26.11, 49.27, 297.79°)
OKLab	oklab(37.21% 0.0135 -0.1251)
OKLCH	oklch(37.21% 0.126 276.1)
XYZ	xyz(6.5009, 4.7837, 21.3454)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313581 #817D31

analogous

#315D81 #313581 #553181

triadic

#313581 #813135 #358131

tetradic

#313581 #81315D #817D31 #318155

square

#313581 #81315D #817D31 #318155

split-complementary

#313581 #815531 #5D8131

monochromatic

#0F1128 #202355 #313581 #4247AD #676CC5

Accessibility & contrast

On white

10.73

#313581 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#313581 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313581

10.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313581	#FFFFFF	#000000	##FFFFFF
##313581	1.00	10.73	1.96	10.73
#FFFFFF	10.73	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004184

Deuteranopia (green-blind)

#003A7F

Tritanopia (blue-blind)

#004755

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #313581;
/* rgb */ color: rgb(49, 53, 129);
/* oklch */ color: oklch(37.2% 0.126 276.1);

Tailwind

colors: {
  custom: {
    50: '#726ca6',
    500: '#313581',
    950: '#000000',
  },
}

SCSS

$custom: #313581;
$custom-light: #726ca6;
$custom-dark: #000000;

JSON

{
  "hex": "#313581",
  "rgb": {
    "r": 49,
    "g": 53,
    "b": 129
  },
  "hsl": {
    "h": 237,
    "s": 44.944,
    "l": 34.902
  },
  "oklch": {
    "l": 0.37215,
    "c": 0.12585,
    "h": 276.1
  },
  "luminance": 0.04784
}

Semantic roles & 50–950 ramp

primary

#313581

secondary

#ADA961

accent

#CE53D5

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #313581

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

Preview Lab → · Contrast checker → · Palette generator →