#313F72#313F72

#313F72 is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.2% C 0.089 H 270.2°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#313F72
RGB	rgb(49, 63, 114)
HSL	hsl(227, 40%, 32%)
HSV	hsv(227, 57%, 45%)
CMYK	cmyk(57%, 44.7%, 0%, 55.3%)
CIE-LAB	lab(27.91, 10.72, -31.23)
CIE-LCH	lch(27.91, 33.02, 288.94°)
OKLab	oklab(38.24% 0.0003 -0.0887)
OKLCH	oklch(38.24% 0.089 270.2)
XYZ	xyz(6.0804, 5.4225, 16.6426)
Luminance	0.0542 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F72 #726431

analogous

#316072 #313F72 #443172

triadic

#313F72 #72313F #3F7231

tetradic

#313F72 #723160 #726431 #317244

square

#313F72 #723160 #726431 #317244

split-complementary

#313F72 #724431 #607231

monochromatic

#0C101C #1F2747 #313F72 #43579D #6275BB

Accessibility & contrast

On white

10.07

#313F72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#313F72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F72

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F72	#FFFFFF	#000000	##FFFFFF
##313F72	1.00	10.07	2.08	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294574

Deuteranopia (green-blind)

#223F71

Tritanopia (blue-blind)

#0F4A53

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #313f72;
/* rgb */ color: rgb(49, 63, 114);
/* oklch */ color: oklch(38.2% 0.089 270.2);

Tailwind

colors: {
  custom: {
    50: '#6e739b',
    500: '#313f72',
    950: '#000000',
  },
}

SCSS

$custom: #313f72;
$custom-light: #6e739b;
$custom-dark: #000000;

JSON

{
  "hex": "#313f72",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 114
  },
  "hsl": {
    "h": 227.077,
    "s": 39.877,
    "l": 31.961
  },
  "oklch": {
    "l": 0.38238,
    "c": 0.08873,
    "h": 270.2
  },
  "luminance": 0.05423
}

Semantic roles & 50–950 ramp

primary

#313F72

secondary

#A3945C

accent

#B658D0

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#08080E

muted

#7B7B7E

Preview Lab

Preview with #313F72

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

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