#313DB4#313DB4

#313DB4 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.2% C 0.186 H 271.5°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#313DB4
RGB	rgb(49, 61, 180)
HSL	hsl(235, 57%, 45%)
HSV	hsv(235, 73%, 71%)
CMYK	cmyk(72.8%, 66.1%, 0%, 29.4%)
CIE-LAB	lab(32.45, 36.10, -64.32)
CIE-LCH	lch(32.45, 73.76, 299.30°)
OKLab	oklab(43.22% 0.0048 -0.1859)
OKLCH	oklch(43.22% 0.186 271.5)
XYZ	xyz(11.1708, 7.2846, 43.9885)
Luminance	0.0729 (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

#313DB4 #B4A831

analogous

#317EB4 #313DB4 #6731B4

triadic

#313DB4 #B4313D #3DB431

tetradic

#313DB4 #B4317E #B4A831 #31B467

square

#313DB4 #B4317E #B4A831 #31B467

split-complementary

#313DB4 #B46731 #7EB431

monochromatic

#171C54 #242D84 #313DB4 #525ED0 #828BDD

Accessibility & contrast

On white

8.55

#313DB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#313DB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313DB4

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313DB4	#FFFFFF	#000000	##FFFFFF
##313DB4	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0046B2

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #313db4;
/* rgb */ color: rgb(49, 61, 180);
/* oklch */ color: oklch(43.2% 0.186 271.5);

Tailwind

colors: {
  custom: {
    50: '#7c72cb',
    500: '#313db4',
    950: '#000000',
  },
}

SCSS

$custom: #313db4;
$custom-light: #7c72cb;
$custom-dark: #000000;

JSON

{
  "hex": "#313db4",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 180
  },
  "hsl": {
    "h": 234.504,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43223,
    "c": 0.186,
    "h": 271.5
  },
  "luminance": 0.07286
}

Semantic roles & 50–950 ramp

primary

#313DB4

secondary

#C6BF7B

accent

#D247E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313DB4

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

Preview Lab → · Contrast checker → · Palette generator →