#313A8B#313A8B

#313A8B is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.0% C 0.134 H 273.7°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#313A8B
RGB	rgb(49, 58, 139)
HSL	hsl(234, 48%, 37%)
HSV	hsv(234, 65%, 55%)
CMYK	cmyk(64.7%, 58.3%, 0%, 45.5%)
CIE-LAB	lab(28.23, 23.23, -46.38)
CIE-LCH	lch(28.23, 51.87, 296.61°)
OKLab	oklab(39.04% 0.0086 -0.1333)
OKLCH	oklch(39.04% 0.134 273.7)
XYZ	xyz(7.4383, 5.5425, 25.0989)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A8B #8B8231

analogous

#31678B #313A8B #55318B

triadic

#313A8B #8B313A #3A8B31

tetradic

#313A8B #8B3167 #8B8231 #318B55

square

#313A8B #8B3167 #8B8231 #318B55

split-complementary

#313A8B #8B5531 #678B31

monochromatic

#111431 #21275E #313A8B #414DB8 #6B75CB

Accessibility & contrast

On white

9.96

#313A8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#313A8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A8B

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A8B	#FFFFFF	#000000	##FFFFFF
##313A8B	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478E

Deuteranopia (green-blind)

#003F89

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313a8b;
/* rgb */ color: rgb(49, 58, 139);
/* oklch */ color: oklch(39.0% 0.134 273.7);

Tailwind

colors: {
  custom: {
    50: '#7370ad',
    500: '#313a8b',
    950: '#000000',
  },
}

SCSS

$custom: #313a8b;
$custom-light: #7370ad;
$custom-dark: #000000;

JSON

{
  "hex": "#313a8b",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 139
  },
  "hsl": {
    "h": 234,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39038,
    "c": 0.13358,
    "h": 273.7
  },
  "luminance": 0.05543
}

Semantic roles & 50–950 ramp

primary

#313A8B

secondary

#B2AB65

accent

#CA50D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313A8B

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

Preview Lab → · Contrast checker → · Palette generator →