#313BAB#313BAB

#313BAB is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.0% C 0.177 H 272.2°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#313BAB
RGB	rgb(49, 59, 171)
HSL	hsl(235, 55%, 43%)
HSV	hsv(235, 71%, 67%)
CMYK	cmyk(71.3%, 65.5%, 0%, 32.9%)
CIE-LAB	lab(31.16, 34.16, -61.06)
CIE-LCH	lch(31.16, 69.97, 299.22°)
OKLab	oklab(42.04% 0.0068 -0.1764)
OKLCH	oklch(42.04% 0.177 272.2)
XYZ	xyz(10.1788, 6.7202, 39.2809)
Luminance	0.0672 (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

#313BAB #ABA131

analogous

#3178AB #313BAB #6431AB

triadic

#313BAB #AB313B #3BAB31

tetradic

#313BAB #AB3178 #ABA131 #31AB64

square

#313BAB #AB3178 #ABA131 #31AB64

split-complementary

#313BAB #AB6431 #78AB31

monochromatic

#161A4C #232B7B #313BAB #4D58CC #7D84DA

Accessibility & contrast

On white

8.96

#313BAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#313BAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313BAB

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313BAB	#FFFFFF	#000000	##FFFFFF
##313BAB	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAF

Deuteranopia (green-blind)

#0044A9

Tritanopia (blue-blind)

#00586D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #313bab;
/* rgb */ color: rgb(49, 59, 171);
/* oklch */ color: oklch(42.0% 0.177 272.2);

Tailwind

colors: {
  custom: {
    50: '#7a71c5',
    500: '#313bab',
    950: '#000000',
  },
}

SCSS

$custom: #313bab;
$custom-light: #7a71c5;
$custom-dark: #000000;

JSON

{
  "hex": "#313bab",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 171
  },
  "hsl": {
    "h": 235.082,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.42037,
    "c": 0.17654,
    "h": 272.2
  },
  "luminance": 0.06721
}

Semantic roles & 50–950 ramp

primary

#313BAB

secondary

#C2BC75

accent

#D249DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #313BAB

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

Preview Lab → · Contrast checker → · Palette generator →