#313FAC#313FAC

#313FAC is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.8% C 0.173 H 271.3°. Best body text is #FFFFFF at 8.62:1 contrast (WCAG AA passes).

Color values

HEX	#313FAC
RGB	rgb(49, 63, 172)
HSL	hsl(233, 56%, 43%)
HSV	hsv(233, 72%, 67%)
CMYK	cmyk(71.5%, 63.4%, 0%, 32.5%)
CIE-LAB	lab(32.23, 31.95, -59.92)
CIE-LCH	lch(32.23, 67.91, 298.07°)
OKLab	oklab(42.84% 0.0039 -0.173)
OKLCH	oklch(42.84% 0.173 271.3)
XYZ	xyz(10.4880, 7.1855, 39.8559)
Luminance	0.0719 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.33

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313FAC #AC9E31

analogous

#317CAC #313FAC #6031AC

triadic

#313FAC #AC313F #3FAC31

tetradic

#313FAC #AC317C #AC9E31 #31AC60

square

#313FAC #AC317C #AC9E31 #31AC60

split-complementary

#313FAC #AC6031 #7CAC31

monochromatic

#161C4D #232E7C #313FAC #4E5CCC #7D88DA

Accessibility & contrast

On white

8.62

#313FAC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#313FAC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313FAC

8.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313FAC	#FFFFFF	#000000	##FFFFFF
##313FAC	1.00	8.62	2.44	8.62
#FFFFFF	8.62	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B0

Deuteranopia (green-blind)

#0046AA

Tritanopia (blue-blind)

#005B6F

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #313fac;
/* rgb */ color: rgb(49, 63, 172);
/* oklch */ color: oklch(42.8% 0.173 271.3);

Tailwind

colors: {
  custom: {
    50: '#7a74c6',
    500: '#313fac',
    950: '#000000',
  },
}

SCSS

$custom: #313fac;
$custom-light: #7a74c6;
$custom-dark: #000000;

JSON

{
  "hex": "#313fac",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 172
  },
  "hsl": {
    "h": 233.171,
    "s": 55.656,
    "l": 43.333
  },
  "oklch": {
    "l": 0.42844,
    "c": 0.17307,
    "h": 271.3
  },
  "luminance": 0.07187
}

Semantic roles & 50–950 ramp

primary

#313FAC

secondary

#C3BA76

accent

#CE49DF

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #313FAC

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

Preview Lab → · Contrast checker → · Palette generator →