#313A9D#313A9D

#313A9D is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.6% C 0.159 H 273.0°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#313A9D
RGB	rgb(49, 58, 157)
HSL	hsl(235, 52%, 40%)
HSV	hsv(235, 69%, 62%)
CMYK	cmyk(68.8%, 63.1%, 0%, 38.4%)
CIE-LAB	lab(29.69, 29.78, -55.02)
CIE-LCH	lch(29.69, 62.56, 298.42°)
OKLab	oklab(40.58% 0.0084 -0.1587)
OKLCH	oklch(40.58% 0.159 273)
XYZ	xyz(8.8634, 6.1126, 32.6045)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A9D #9D9431

analogous

#31709D #313A9D #5E319D

triadic

#313A9D #9D313A #3A9D31

tetradic

#313A9D #9D3170 #9D9431 #319D5E

square

#313A9D #9D3170 #9D9431 #319D5E

split-complementary

#313A9D #9D5E31 #709D31

monochromatic

#141840 #22296E #313A9D #4651C5 #757DD4

Accessibility & contrast

On white

9.45

#313A9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#313A9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A9D

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A9D	#FFFFFF	#000000	##FFFFFF
##313A9D	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA0

Deuteranopia (green-blind)

#00419B

Tritanopia (blue-blind)

#005366

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #313a9d;
/* rgb */ color: rgb(49, 58, 157);
/* oklch */ color: oklch(40.6% 0.159 273.0);

Tailwind

colors: {
  custom: {
    50: '#7770bb',
    500: '#313a9d',
    950: '#000000',
  },
}

SCSS

$custom: #313a9d;
$custom-light: #7770bb;
$custom-dark: #000000;

JSON

{
  "hex": "#313a9d",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 157
  },
  "hsl": {
    "h": 235,
    "s": 52.427,
    "l": 40.392
  },
  "oklch": {
    "l": 0.40584,
    "c": 0.15892,
    "h": 273
  },
  "luminance": 0.06113
}

Semantic roles & 50–950 ramp

primary

#313A9D

secondary

#BCB56E

accent

#D04CDC

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #313A9D

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

Preview Lab → · Contrast checker → · Palette generator →