#313DB8#313DB8

#313DB8 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.191 H 271.3°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#313DB8
RGB	rgb(49, 61, 184)
HSL	hsl(235, 58%, 46%)
HSV	hsv(235, 73%, 72%)
CMYK	cmyk(73.4%, 66.8%, 0%, 27.8%)
CIE-LAB	lab(32.81, 37.51, -66.10)
CIE-LCH	lch(32.81, 76.00, 299.58°)
OKLab	oklab(43.6% 0.0045 -0.1911)
OKLCH	oklch(43.6% 0.191 271.3)
XYZ	xyz(11.5842, 7.4499, 46.1656)
Luminance	0.0745 (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

#313DB8 #B8AC31

analogous

#3180B8 #313DB8 #6931B8

triadic

#313DB8 #B8313D #3DB831

tetradic

#313DB8 #B83180 #B8AC31 #31B869

square

#313DB8 #B83180 #B8AC31 #31B869

split-complementary

#313DB8 #B86931 #80B831

monochromatic

#171D57 #242D88 #313DB8 #5560D2 #858DDE

Accessibility & contrast

On white

8.43

#313DB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#313DB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313DB8

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313DB8	#FFFFFF	#000000	##FFFFFF
##313DB8	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BC

Deuteranopia (green-blind)

#0047B6

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #313db8;
/* rgb */ color: rgb(49, 61, 184);
/* oklch */ color: oklch(43.6% 0.191 271.3);

Tailwind

colors: {
  custom: {
    50: '#7d73ce',
    500: '#313db8',
    950: '#000000',
  },
}

SCSS

$custom: #313db8;
$custom-light: #7d73ce;
$custom-dark: #000000;

JSON

{
  "hex": "#313db8",
  "rgb": {
    "r": 49,
    "g": 61,
    "b": 184
  },
  "hsl": {
    "h": 234.667,
    "s": 57.94,
    "l": 45.686
  },
  "oklch": {
    "l": 0.436,
    "c": 0.19118,
    "h": 271.3
  },
  "luminance": 0.07451
}

Semantic roles & 50–950 ramp

primary

#313DB8

secondary

#C8C17D

accent

#D347E1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #313DB8

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

Preview Lab → · Contrast checker → · Palette generator →