#313CB1#313CB1

#313CB1 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.8% C 0.183 H 271.8°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#313CB1
RGB	rgb(49, 60, 177)
HSL	hsl(235, 57%, 44%)
HSV	hsv(235, 72%, 69%)
CMYK	cmyk(72.3%, 66.1%, 0%, 30.6%)
CIE-LAB	lab(31.94, 35.66, -63.37)
CIE-LCH	lch(31.94, 72.72, 299.37°)
OKLab	oklab(42.77% 0.0057 -0.1832)
OKLCH	oklch(42.77% 0.183 271.8)
XYZ	xyz(10.8156, 7.0579, 42.3788)
Luminance	0.0706 (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

#313CB1 #B1A631

analogous

#317CB1 #313CB1 #6631B1

triadic

#313CB1 #B1313C #3CB131

tetradic

#313CB1 #B1317C #B1A631 #31B166

square

#313CB1 #B1317C #B1A631 #31B166

split-complementary

#313CB1 #B16631 #7CB131

monochromatic

#161C51 #242C81 #313CB1 #515BCF #8088DC

Accessibility & contrast

On white

8.71

#313CB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#313CB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313CB1

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313CB1	#FFFFFF	#000000	##FFFFFF
##313CB1	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0045AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #313cb1;
/* rgb */ color: rgb(49, 60, 177);
/* oklch */ color: oklch(42.8% 0.183 271.8);

Tailwind

colors: {
  custom: {
    50: '#7c72c9',
    500: '#313cb1',
    950: '#000000',
  },
}

SCSS

$custom: #313cb1;
$custom-light: #7c72c9;
$custom-dark: #000000;

JSON

{
  "hex": "#313cb1",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 177
  },
  "hsl": {
    "h": 234.844,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.4277,
    "c": 0.18326,
    "h": 271.8
  },
  "luminance": 0.07059
}

Semantic roles & 50–950 ramp

primary

#313CB1

secondary

#C5BE79

accent

#D348E0

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313CB1

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

Preview Lab → · Contrast checker → · Palette generator →