#313EB1#313EB1

#313EB1 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.1% C 0.181 H 271.4°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#313EB1
RGB	rgb(49, 62, 177)
HSL	hsl(234, 57%, 44%)
HSV	hsv(234, 72%, 69%)
CMYK	cmyk(72.3%, 65%, 0%, 30.6%)
CIE-LAB	lab(32.42, 34.39, -62.59)
CIE-LCH	lch(32.42, 71.42, 298.79°)
OKLab	oklab(43.12% 0.0044 -0.1809)
OKLCH	oklch(43.12% 0.181 271.4)
XYZ	xyz(10.9224, 7.2714, 42.4144)
Luminance	0.0727 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.70

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313EB1 #B1A431

analogous

#317EB1 #313EB1 #6431B1

triadic

#313EB1 #B1313E #3EB131

tetradic

#313EB1 #B1317E #B1A431 #31B164

square

#313EB1 #B1317E #B1A431 #31B164

split-complementary

#313EB1 #B16431 #7EB131

monochromatic

#161C51 #242D81 #313EB1 #515DCF #808ADC

Accessibility & contrast

On white

8.56

#313EB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#313EB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313EB1

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313EB1	#FFFFFF	#000000	##FFFFFF
##313EB1	1.00	8.56	2.45	8.56
#FFFFFF	8.56	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0046AF

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #313eb1;
/* rgb */ color: rgb(49, 62, 177);
/* oklch */ color: oklch(43.1% 0.181 271.4);

Tailwind

colors: {
  custom: {
    50: '#7b73c9',
    500: '#313eb1',
    950: '#000000',
  },
}

SCSS

$custom: #313eb1;
$custom-light: #7b73c9;
$custom-dark: #000000;

JSON

{
  "hex": "#313eb1",
  "rgb": {
    "r": 49,
    "g": 62,
    "b": 177
  },
  "hsl": {
    "h": 233.906,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.4312,
    "c": 0.18091,
    "h": 271.4
  },
  "luminance": 0.07273
}

Semantic roles & 50–950 ramp

primary

#313EB1

secondary

#C5BD79

accent

#D048E0

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313EB1

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

Preview Lab → · Contrast checker → · Palette generator →