#313B71#313B71

#313B71 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.3% C 0.093 H 273.2°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#313B71
RGB	rgb(49, 59, 113)
HSL	hsl(231, 40%, 32%)
HSV	hsv(231, 57%, 44%)
CMYK	cmyk(56.6%, 47.8%, 0%, 55.7%)
CIE-LAB	lab(26.66, 13.10, -32.59)
CIE-LCH	lch(26.66, 35.12, 291.90°)
OKLab	oklab(37.26% 0.0052 -0.0927)
OKLCH	oklch(37.26% 0.093 273.2)
XYZ	xyz(5.8103, 4.9728, 16.2732)
Luminance	0.0497 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B71 #716731

analogous

#315B71 #313B71 #473171

triadic

#313B71 #71313B #3B7131

tetradic

#313B71 #71315B #716731 #317147

square

#313B71 #71315B #716731 #317147

split-complementary

#313B71 #714731 #5B7131

monochromatic

#0C0E1C #1E2546 #313B71 #44519C #6270BB

Accessibility & contrast

On white

10.53

#313B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#313B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B71

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B71	#FFFFFF	#000000	##FFFFFF
##313B71	1.00	10.53	1.99	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234273

Deuteranopia (green-blind)

#1B3C70

Tritanopia (blue-blind)

#114750

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #313b71;
/* rgb */ color: rgb(49, 59, 113);
/* oklch */ color: oklch(37.3% 0.093 273.2);

Tailwind

colors: {
  custom: {
    50: '#6e709a',
    500: '#313b71',
    950: '#000000',
  },
}

SCSS

$custom: #313b71;
$custom-light: #6e709a;
$custom-dark: #000000;

JSON

{
  "hex": "#313b71",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 113
  },
  "hsl": {
    "h": 230.625,
    "s": 39.506,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37263,
    "c": 0.09289,
    "h": 273.2
  },
  "luminance": 0.04973
}

Semantic roles & 50–950 ramp

primary

#313B71

secondary

#A2975C

accent

#BD58CF

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#08070E

muted

#7B7A7E

Preview Lab

Preview with #313B71

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

Preview Lab → · Contrast checker → · Palette generator →