#313B75#313B75

#313B75 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.5% C 0.099 H 273.3°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#313B75
RGB	rgb(49, 59, 117)
HSL	hsl(231, 41%, 33%)
HSV	hsv(231, 58%, 46%)
CMYK	cmyk(58.1%, 49.6%, 0%, 54.1%)
CIE-LAB	lab(26.92, 14.54, -34.71)
CIE-LCH	lch(26.92, 37.63, 292.72°)
OKLab	oklab(37.55% 0.0058 -0.099)
OKLCH	oklch(37.55% 0.099 273.3)
XYZ	xyz(6.0404, 5.0648, 17.4855)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B75 #756B31

analogous

#315D75 #313B75 #493175

triadic

#313B75 #75313B #3B7531

tetradic

#313B75 #75315D #756B31 #317549

square

#313B75 #75315D #756B31 #317549

split-complementary

#313B75 #754931 #5D7531

monochromatic

#0D0F1F #1F254A #313B75 #4351A0 #6370BE

Accessibility & contrast

On white

10.43

#313B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#313B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B75

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B75	#FFFFFF	#000000	##FFFFFF
##313B75	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204377

Deuteranopia (green-blind)

#173D74

Tritanopia (blue-blind)

#0B4852

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #313b75;
/* rgb */ color: rgb(49, 59, 117);
/* oklch */ color: oklch(37.5% 0.099 273.3);

Tailwind

colors: {
  custom: {
    50: '#6f709d',
    500: '#313b75',
    950: '#000000',
  },
}

SCSS

$custom: #313b75;
$custom-light: #6f709d;
$custom-dark: #000000;

JSON

{
  "hex": "#313b75",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 117
  },
  "hsl": {
    "h": 231.176,
    "s": 40.964,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37547,
    "c": 0.09915,
    "h": 273.3
  },
  "luminance": 0.05065
}

Semantic roles & 50–950 ramp

primary

#313B75

secondary

#A59A5D

accent

#BF57D1

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#08070E

muted

#7B7A7E

Preview Lab

Preview with #313B75

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

Preview Lab → · Contrast checker → · Palette generator →