#313DB3#313DB3

#313DB3 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.185 H 271.5°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#313DB3
RGB	rgb(49, 61, 179)
HSL	hsl(234, 57%, 45%)
HSV	hsv(234, 73%, 70%)
CMYK	cmyk(72.6%, 65.9%, 0%, 29.8%)
CIE-LAB	lab(32.36, 35.74, -63.88)
CIE-LCH	lch(32.36, 73.20, 299.23°)
OKLab	oklab(43.13% 0.0049 -0.1846)
OKLCH	oklch(43.13% 0.185 271.5)
XYZ	xyz(11.0693, 7.2440, 43.4539)
Luminance	0.0725 (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

#313DB3 #B3A731

analogous

#317EB3 #313DB3 #6631B3

triadic

#313DB3 #B3313D #3DB331

tetradic

#313DB3 #B3317E #B3A731 #31B366

square

#313DB3 #B3317E #B3A731 #31B366

split-complementary

#313DB3 #B36631 #7EB331

monochromatic

#171C53 #242D83 #313DB3 #525DD0 #828ADD

Accessibility & contrast

On white

8.57

#313DB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#313DB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313DB3

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313DB3	#FFFFFF	#000000	##FFFFFF
##313DB3	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B7

Deuteranopia (green-blind)

#0046B1

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #313db3;
/* rgb */ color: rgb(49, 61, 179);
/* oklch */ color: oklch(43.1% 0.185 271.5);

Tailwind

colors: {
  custom: {
    50: '#7c72cb',
    500: '#313db3',
    950: '#000000',
  },
}

SCSS

$custom: #313db3;
$custom-light: #7c72cb;
$custom-dark: #000000;

JSON

{
  "hex": "#313db3",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 179
  },
  "hsl": {
    "h": 234.462,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.4313,
    "c": 0.1847,
    "h": 271.5
  },
  "luminance": 0.07245
}

Semantic roles & 50–950 ramp

primary

#313DB3

secondary

#C6BF7A

accent

#D248E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313DB3

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

Preview Lab → · Contrast checker → · Palette generator →