#313AAB#313AAB

#313AAB is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.9% C 0.178 H 272.4°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#313AAB
RGB	rgb(49, 58, 171)
HSL	hsl(236, 55%, 43%)
HSV	hsv(236, 71%, 67%)
CMYK	cmyk(71.3%, 66.1%, 0%, 32.9%)
CIE-LAB	lab(30.92, 34.80, -61.46)
CIE-LCH	lch(30.92, 70.62, 299.52°)
OKLab	oklab(41.86% 0.0075 -0.1776)
OKLCH	oklch(41.86% 0.178 272.4)
XYZ	xyz(10.1279, 6.6184, 39.2639)
Luminance	0.0662 (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

#313AAB #ABA231

analogous

#3177AB #313AAB #6531AB

triadic

#313AAB #AB313A #3AAB31

tetradic

#313AAB #AB3177 #ABA231 #31AB65

square

#313AAB #AB3177 #ABA231 #31AB65

split-complementary

#313AAB #AB6531 #77AB31

monochromatic

#161A4C #232A7B #313AAB #4D57CC #7D84DA

Accessibility & contrast

On white

9.04

#313AAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#313AAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313AAB

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313AAB	#FFFFFF	#000000	##FFFFFF
##313AAB	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00586D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #313aab;
/* rgb */ color: rgb(49, 58, 171);
/* oklch */ color: oklch(41.9% 0.178 272.4);

Tailwind

colors: {
  custom: {
    50: '#7a70c5',
    500: '#313aab',
    950: '#000000',
  },
}

SCSS

$custom: #313aab;
$custom-light: #7a70c5;
$custom-dark: #000000;

JSON

{
  "hex": "#313aab",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 171
  },
  "hsl": {
    "h": 235.574,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.41862,
    "c": 0.17773,
    "h": 272.4
  },
  "luminance": 0.06619
}

Semantic roles & 50–950 ramp

primary

#313AAB

secondary

#C2BD75

accent

#D449DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #313AAB

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

Preview Lab → · Contrast checker → · Palette generator →