#313F71#313F71

#313F71 is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.2% C 0.087 H 270.1°. Best body text is #FFFFFF at 10.10:1 contrast (WCAG AA passes).

Color values

HEX	#313F71
RGB	rgb(49, 63, 113)
HSL	hsl(227, 40%, 32%)
HSV	hsv(227, 57%, 44%)
CMYK	cmyk(56.6%, 44.2%, 0%, 55.7%)
CIE-LAB	lab(27.84, 10.36, -30.70)
CIE-LCH	lch(27.84, 32.40, 288.65°)
OKLab	oklab(38.17% 0.0001 -0.0872)
OKLCH	oklch(38.17% 0.087 270.1)
XYZ	xyz(6.0238, 5.3998, 16.3444)
Luminance	0.0540 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F71 #716331

analogous

#315F71 #313F71 #433171

triadic

#313F71 #71313F #3F7131

tetradic

#313F71 #71315F #716331 #317143

square

#313F71 #71315F #716331 #317143

split-complementary

#313F71 #714331 #5F7131

monochromatic

#0C0F1C #1E2746 #313F71 #44579C #6275BB

Accessibility & contrast

On white

10.10

#313F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#313F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F71

10.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F71	#FFFFFF	#000000	##FFFFFF
##313F71	1.00	10.10	2.08	10.10
#FFFFFF	10.10	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4573

Deuteranopia (green-blind)

#233F70

Tritanopia (blue-blind)

#104A52

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #313f71;
/* rgb */ color: rgb(49, 63, 113);
/* oklch */ color: oklch(38.2% 0.087 270.1);

Tailwind

colors: {
  custom: {
    50: '#6e739a',
    500: '#313f71',
    950: '#000000',
  },
}

SCSS

$custom: #313f71;
$custom-light: #6e739a;
$custom-dark: #000000;

JSON

{
  "hex": "#313f71",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 113
  },
  "hsl": {
    "h": 226.875,
    "s": 39.506,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38171,
    "c": 0.08716,
    "h": 270.1
  },
  "luminance": 0.054
}

Semantic roles & 50–950 ramp

primary

#313F71

secondary

#A2935C

accent

#B558CF

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #313F71

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

Preview Lab → · Contrast checker → · Palette generator →