#313C8A#313C8A

#313C8A is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.4% C 0.129 H 272.9°. Best body text is #FFFFFF at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#313C8A
RGB	rgb(49, 60, 138)
HSL	hsl(233, 48%, 37%)
HSV	hsv(233, 64%, 54%)
CMYK	cmyk(64.5%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(28.69, 21.52, -45.00)
CIE-LCH	lch(28.69, 49.88, 295.56°)
OKLab	oklab(39.36% 0.0066 -0.1292)
OKLCH	oklch(39.36% 0.129 272.9)
XYZ	xyz(7.4684, 5.7190, 24.7501)
Luminance	0.0572 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313C8A #8A7F31

analogous

#31698A #313C8A #53318A

triadic

#313C8A #8A313C #3C8A31

tetradic

#313C8A #8A3169 #8A7F31 #318A53

square

#313C8A #8A3169 #8A7F31 #318A53

split-complementary

#313C8A #8A5331 #698A31

monochromatic

#111530 #21285D #313C8A #4150B7 #6B77CA

Accessibility & contrast

On white

9.79

#313C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#313C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313C8A

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313C8A	#FFFFFF	#000000	##FFFFFF
##313C8A	1.00	9.79	2.14	9.79
#FFFFFF	9.79	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01488D

Deuteranopia (green-blind)

#004088

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #313c8a;
/* rgb */ color: rgb(49, 60, 138);
/* oklch */ color: oklch(39.4% 0.129 272.9);

Tailwind

colors: {
  custom: {
    50: '#7371ad',
    500: '#313c8a',
    950: '#000000',
  },
}

SCSS

$custom: #313c8a;
$custom-light: #7371ad;
$custom-dark: #000000;

JSON

{
  "hex": "#313c8a",
  "rgb": {
    "r": 49,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 232.584,
    "s": 47.594,
    "l": 36.667
  },
  "oklch": {
    "l": 0.39361,
    "c": 0.12941,
    "h": 272.9
  },
  "luminance": 0.0572
}

Semantic roles & 50–950 ramp

primary

#313C8A

secondary

#B2A865

accent

#C751D7

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #313C8A

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

Preview Lab → · Contrast checker → · Palette generator →