#313FB4#313FB4

#313FB4 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.184 H 271.1°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#313FB4
RGB	rgb(49, 63, 180)
HSL	hsl(234, 57%, 45%)
HSV	hsv(234, 73%, 71%)
CMYK	cmyk(72.8%, 65%, 0%, 29.4%)
CIE-LAB	lab(32.92, 34.83, -63.54)
CIE-LCH	lch(32.92, 72.46, 298.73°)
OKLab	oklab(43.57% 0.0035 -0.1836)
OKLCH	oklch(43.57% 0.184 271.1)
XYZ	xyz(11.2796, 7.5021, 44.0248)
Luminance	0.0750 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.51

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FB4 #B4A631

analogous

#3180B4 #313FB4 #6531B4

triadic

#313FB4 #B4313F #3FB431

tetradic

#313FB4 #B43180 #B4A631 #31B465

square

#313FB4 #B43180 #B4A631 #31B465

split-complementary

#313FB4 #B46531 #80B431

monochromatic

#171D54 #242E84 #313FB4 #5260D0 #828CDD

Accessibility & contrast

On white

8.40

#313FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#313FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FB4

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FB4	#FFFFFF	#000000	##FFFFFF
##313FB4	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B8

Deuteranopia (green-blind)

#0047B2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #313fb4;
/* rgb */ color: rgb(49, 63, 180);
/* oklch */ color: oklch(43.6% 0.184 271.1);

Tailwind

colors: {
  custom: {
    50: '#7c74cb',
    500: '#313fb4',
    950: '#000000',
  },
}

SCSS

$custom: #313fb4;
$custom-light: #7c74cb;
$custom-dark: #000000;

JSON

{
  "hex": "#313fb4",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 180
  },
  "hsl": {
    "h": 233.588,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43572,
    "c": 0.18367,
    "h": 271.1
  },
  "luminance": 0.07503
}

Semantic roles & 50–950 ramp

primary

#313FB4

secondary

#C6BE7B

accent

#D047E0

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313FB4

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

Preview Lab → · Contrast checker → · Palette generator →