#313FB1#313FB1

#313FB1 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.3% C 0.180 H 271.2°. Best body text is #FFFFFF at 8.48:1 contrast (WCAG AA passes).

Color values

HEX	#313FB1
RGB	rgb(49, 63, 177)
HSL	hsl(233, 57%, 44%)
HSV	hsv(233, 72%, 69%)
CMYK	cmyk(72.3%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(32.66, 33.75, -62.19)
CIE-LCH	lch(32.66, 70.76, 298.49°)
OKLab	oklab(43.3% 0.0037 -0.1797)
OKLCH	oklch(43.3% 0.18 271.2)
XYZ	xyz(10.9772, 7.3812, 42.4326)
Luminance	0.0738 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.80

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FB1 #B1A331

analogous

#317FB1 #313FB1 #6331B1

triadic

#313FB1 #B1313F #3FB131

tetradic

#313FB1 #B1317F #B1A331 #31B163

square

#313FB1 #B1317F #B1A331 #31B163

split-complementary

#313FB1 #B16331 #7FB131

monochromatic

#161D51 #242E81 #313FB1 #515ECF #808ADC

Accessibility & contrast

On white

8.48

#313FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#313FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FB1

8.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FB1	#FFFFFF	#000000	##FFFFFF
##313FB1	1.00	8.48	2.48	8.48
#FFFFFF	8.48	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #313fb1;
/* rgb */ color: rgb(49, 63, 177);
/* oklch */ color: oklch(43.3% 0.180 271.2);

Tailwind

colors: {
  custom: {
    50: '#7b74c9',
    500: '#313fb1',
    950: '#000000',
  },
}

SCSS

$custom: #313fb1;
$custom-light: #7b74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#313fb1",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 233.438,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.43297,
    "c": 0.17973,
    "h": 271.2
  },
  "luminance": 0.07382
}

Semantic roles & 50–950 ramp

primary

#313FB1

secondary

#C5BD79

accent

#CF48E0

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313FB1

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

Preview Lab → · Contrast checker → · Palette generator →