#313B91#313B91

#313B91 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.7% C 0.141 H 273.1°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#313B91
RGB	rgb(49, 59, 145)
HSL	hsl(234, 49%, 38%)
HSV	hsv(234, 66%, 57%)
CMYK	cmyk(66.2%, 59.3%, 0%, 43.1%)
CIE-LAB	lab(28.97, 24.75, -48.88)
CIE-LCH	lch(28.97, 54.79, 296.86°)
OKLab	oklab(39.74% 0.0077 -0.1406)
OKLCH	oklch(39.74% 0.141 273.1)
XYZ	xyz(7.9397, 5.8245, 27.4884)
Luminance	0.0583 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B91 #918731

analogous

#316B91 #313B91 #573191

triadic

#313B91 #91313B #3B9131

tetradic

#313B91 #91316B #918731 #319157

square

#313B91 #91316B #918731 #319157

split-complementary

#313B91 #915731 #6B9131

monochromatic

#121636 #222863 #313B91 #414EBF #6E78CE

Accessibility & contrast

On white

9.70

#313B91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#313B91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B91

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B91	#FFFFFF	#000000	##FFFFFF
##313B91	1.00	9.70	2.17	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004994

Deuteranopia (green-blind)

#00408F

Tritanopia (blue-blind)

#005060

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313b91;
/* rgb */ color: rgb(49, 59, 145);
/* oklch */ color: oklch(39.7% 0.141 273.1);

Tailwind

colors: {
  custom: {
    50: '#7570b2',
    500: '#313b91',
    950: '#000000',
  },
}

SCSS

$custom: #313b91;
$custom-light: #7570b2;
$custom-dark: #000000;

JSON

{
  "hex": "#313b91",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 145
  },
  "hsl": {
    "h": 233.75,
    "s": 49.485,
    "l": 38.039
  },
  "oklch": {
    "l": 0.39736,
    "c": 0.14086,
    "h": 273.1
  },
  "luminance": 0.05825
}

Semantic roles & 50–950 ramp

primary

#313B91

secondary

#B6AE68

accent

#CB4FD9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #313B91

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

Preview Lab → · Contrast checker → · Palette generator →