#313FB3#313FB3

#313FB3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.5% C 0.182 H 271.1°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#313FB3
RGB	rgb(49, 63, 179)
HSL	hsl(234, 57%, 45%)
HSV	hsv(234, 73%, 70%)
CMYK	cmyk(72.6%, 64.8%, 0%, 29.8%)
CIE-LAB	lab(32.84, 34.47, -63.09)
CIE-LCH	lch(32.84, 71.90, 298.65°)
OKLab	oklab(43.48% 0.0036 -0.1823)
OKLCH	oklch(43.48% 0.182 271.1)
XYZ	xyz(11.1780, 7.4615, 43.4902)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FB3 #B3A531

analogous

#3180B3 #313FB3 #6431B3

triadic

#313FB3 #B3313F #3FB331

tetradic

#313FB3 #B33180 #B3A531 #31B364

square

#313FB3 #B33180 #B3A531 #31B364

split-complementary

#313FB3 #B36431 #80B331

monochromatic

#171D53 #242E83 #313FB3 #525FD0 #828CDD

Accessibility & contrast

On white

8.42

#313FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#313FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FB3

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FB3	#FFFFFF	#000000	##FFFFFF
##313FB3	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B7

Deuteranopia (green-blind)

#0047B1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #313fb3;
/* rgb */ color: rgb(49, 63, 179);
/* oklch */ color: oklch(43.5% 0.182 271.1);

Tailwind

colors: {
  custom: {
    50: '#7c74cb',
    500: '#313fb3',
    950: '#000000',
  },
}

SCSS

$custom: #313fb3;
$custom-light: #7c74cb;
$custom-dark: #000000;

JSON

{
  "hex": "#313fb3",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 179
  },
  "hsl": {
    "h": 233.538,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.4348,
    "c": 0.18237,
    "h": 271.1
  },
  "luminance": 0.07463
}

Semantic roles & 50–950 ramp

primary

#313FB3

secondary

#C6BE7A

accent

#D048E0

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313FB3

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

Preview Lab → · Contrast checker → · Palette generator →