#313CB5#313CB5

#313CB5 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.188 H 271.6°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#313CB5
RGB	rgb(49, 60, 181)
HSL	hsl(235, 57%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(72.9%, 66.9%, 0%, 29%)
CIE-LAB	lab(32.30, 37.08, -65.15)
CIE-LCH	lch(32.30, 74.96, 299.64°)
OKLab	oklab(43.15% 0.0054 -0.1884)
OKLCH	oklch(43.15% 0.188 271.6)
XYZ	xyz(11.2201, 7.2197, 44.5093)
Luminance	0.0722 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313CB5 #B5AA31

analogous

#317EB5 #313CB5 #6831B5

triadic

#313CB5 #B5313C #3CB531

tetradic

#313CB5 #B5317E #B5AA31 #31B568

square

#313CB5 #B5317E #B5AA31 #31B568

split-complementary

#313CB5 #B56831 #7EB531

monochromatic

#171C55 #242C85 #313CB5 #535DD0 #838BDD

Accessibility & contrast

On white

8.59

#313CB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#313CB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313CB5

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313CB5	#FFFFFF	#000000	##FFFFFF
##313CB5	1.00	8.59	2.44	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0046B3

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #313cb5;
/* rgb */ color: rgb(49, 60, 181);
/* oklch */ color: oklch(43.1% 0.188 271.6);

Tailwind

colors: {
  custom: {
    50: '#7d72cc',
    500: '#313cb5',
    950: '#000000',
  },
}

SCSS

$custom: #313cb5;
$custom-light: #7d72cc;
$custom-dark: #000000;

JSON

{
  "hex": "#313cb5",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 181
  },
  "hsl": {
    "h": 235,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43146,
    "c": 0.18846,
    "h": 271.6
  },
  "luminance": 0.07221
}

Semantic roles & 50–950 ramp

primary

#313CB5

secondary

#C7C07B

accent

#D447E1

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #313CB5

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

Preview Lab → · Contrast checker → · Palette generator →