#313F73#313F73

#313F73 is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.3% C 0.090 H 270.3°. Best body text is #FFFFFF at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#313F73
RGB	rgb(49, 63, 115)
HSL	hsl(227, 40%, 32%)
HSV	hsv(227, 57%, 45%)
CMYK	cmyk(57.4%, 45.2%, 0%, 54.9%)
CIE-LAB	lab(27.97, 11.08, -31.77)
CIE-LCH	lch(27.97, 33.65, 289.23°)
OKLab	oklab(38.31% 0.0005 -0.0903)
OKLCH	oklch(38.31% 0.09 270.3)
XYZ	xyz(6.1376, 5.4453, 16.9440)
Luminance	0.0545 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F73 #736531

analogous

#316073 #313F73 #443173

triadic

#313F73 #73313F #3F7331

tetradic

#313F73 #733160 #736531 #317344

square

#313F73 #733160 #736531 #317344

split-complementary

#313F73 #734431 #607331

monochromatic

#0C101D #1F2748 #313F73 #43579E #6275BC

Accessibility & contrast

On white

10.05

#313F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#313F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F73

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F73	#FFFFFF	#000000	##FFFFFF
##313F73	1.00	10.05	2.09	10.05
#FFFFFF	10.05	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294575

Deuteranopia (green-blind)

#213F72

Tritanopia (blue-blind)

#0D4A53

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #313f73;
/* rgb */ color: rgb(49, 63, 115);
/* oklch */ color: oklch(38.3% 0.090 270.3);

Tailwind

colors: {
  custom: {
    50: '#6f739b',
    500: '#313f73',
    950: '#000000',
  },
}

SCSS

$custom: #313f73;
$custom-light: #6f739b;
$custom-dark: #000000;

JSON

{
  "hex": "#313f73",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 115
  },
  "hsl": {
    "h": 227.273,
    "s": 40.244,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38305,
    "c": 0.0903,
    "h": 270.3
  },
  "luminance": 0.05446
}

Semantic roles & 50–950 ramp

primary

#313F73

secondary

#A4955C

accent

#B758D0

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#08080E

muted

#7B7B7E

Preview Lab

Preview with #313F73

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

Preview Lab → · Contrast checker → · Palette generator →