#313C87#313C87

#313C87 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.1% C 0.125 H 272.9°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#313C87
RGB	rgb(49, 60, 135)
HSL	hsl(232, 47%, 36%)
HSV	hsv(232, 64%, 53%)
CMYK	cmyk(63.7%, 55.6%, 0%, 47.1%)
CIE-LAB	lab(28.47, 20.42, -43.51)
CIE-LCH	lch(28.47, 48.06, 295.14°)
OKLab	oklab(39.12% 0.0064 -0.1248)
OKLCH	oklch(39.12% 0.125 272.9)
XYZ	xyz(7.2542, 5.6334, 23.6220)
Luminance	0.0563 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C87 #877C31

analogous

#316787 #313C87 #513187

triadic

#313C87 #87313C #3C8731

tetradic

#313C87 #873167 #877C31 #318751

square

#313C87 #873167 #877C31 #318751

split-complementary

#313C87 #875131 #678731

monochromatic

#10142D #21285A #313C87 #4150B4 #6A76C9

Accessibility & contrast

On white

9.87

#313C87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#313C87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C87

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C87	#FFFFFF	#000000	##FFFFFF
##313C87	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#09478A

Deuteranopia (green-blind)

#003F85

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313c87;
/* rgb */ color: rgb(49, 60, 135);
/* oklch */ color: oklch(39.1% 0.125 272.9);

Tailwind

colors: {
  custom: {
    50: '#7271aa',
    500: '#313c87',
    950: '#000000',
  },
}

SCSS

$custom: #313c87;
$custom-light: #7271aa;
$custom-dark: #000000;

JSON

{
  "hex": "#313c87",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 135
  },
  "hsl": {
    "h": 232.326,
    "s": 46.739,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39122,
    "c": 0.12501,
    "h": 272.9
  },
  "luminance": 0.05634
}

Semantic roles & 50–950 ramp

primary

#313C87

secondary

#B0A664

accent

#C551D6

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313C87

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

Preview Lab → · Contrast checker → · Palette generator →