#313B8C#313B8C

#313B8C is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.3% C 0.134 H 273.3°. Best body text is #FFFFFF at 9.84:1 contrast (WCAG AA passes).

Color values

HEX	#313B8C
RGB	rgb(49, 59, 140)
HSL	hsl(233, 48%, 37%)
HSV	hsv(233, 65%, 55%)
CMYK	cmyk(65%, 57.9%, 0%, 45.1%)
CIE-LAB	lab(28.57, 22.93, -46.43)
CIE-LCH	lch(28.57, 51.78, 296.28°)
OKLab	oklab(39.32% 0.0077 -0.1335)
OKLCH	oklch(39.32% 0.134 273.3)
XYZ	xyz(7.5626, 5.6737, 25.5025)
Luminance	0.0567 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B8C #8C8231

analogous

#31688C #313B8C #55318C

triadic

#313B8C #8C313B #3B8C31

tetradic

#313B8C #8C3168 #8C8231 #318C55

square

#313B8C #8C3168 #8C8231 #318C55

split-complementary

#313B8C #8C5531 #688C31

monochromatic

#111531 #21285F #313B8C #414EB9 #6C76CC

Accessibility & contrast

On white

9.84

#313B8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#313B8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B8C

9.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B8C	#FFFFFF	#000000	##FFFFFF
##313B8C	1.00	9.84	2.13	9.84
#FFFFFF	9.84	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488F

Deuteranopia (green-blind)

#003F8A

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313b8c;
/* rgb */ color: rgb(49, 59, 140);
/* oklch */ color: oklch(39.3% 0.134 273.3);

Tailwind

colors: {
  custom: {
    50: '#7470ae',
    500: '#313b8c',
    950: '#000000',
  },
}

SCSS

$custom: #313b8c;
$custom-light: #7470ae;
$custom-dark: #000000;

JSON

{
  "hex": "#313b8c",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 140
  },
  "hsl": {
    "h": 233.407,
    "s": 48.148,
    "l": 37.059
  },
  "oklch": {
    "l": 0.39321,
    "c": 0.13367,
    "h": 273.3
  },
  "luminance": 0.05674
}

Semantic roles & 50–950 ramp

primary

#313B8C

secondary

#B3AB66

accent

#C950D8

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313B8C

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

Preview Lab → · Contrast checker → · Palette generator →