#313B78#313B78

#313B78 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.8% C 0.104 H 273.4°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#313B78
RGB	rgb(49, 59, 120)
HSL	hsl(232, 42%, 33%)
HSV	hsv(232, 59%, 47%)
CMYK	cmyk(59.2%, 50.8%, 0%, 52.9%)
CIE-LAB	lab(27.12, 15.62, -36.29)
CIE-LCH	lch(27.12, 39.51, 293.29°)
OKLab	oklab(37.76% 0.0062 -0.1036)
OKLCH	oklch(37.76% 0.104 273.4)
XYZ	xyz(6.2196, 5.1365, 18.4294)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B78 #786E31

analogous

#315E78 #313B78 #4A3178

triadic

#313B78 #78313B #3B7831

tetradic

#313B78 #78315E #786E31 #31784A

square

#313B78 #78315E #786E31 #31784A

split-complementary

#313B78 #784A31 #5E7831

monochromatic

#0E1021 #1F264D #313B78 #4350A3 #6471C0

Accessibility & contrast

On white

10.36

#313B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#313B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B78

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B78	#FFFFFF	#000000	##FFFFFF
##313B78	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D437A

Deuteranopia (green-blind)

#123D77

Tritanopia (blue-blind)

#054953

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #313b78;
/* rgb */ color: rgb(49, 59, 120);
/* oklch */ color: oklch(37.8% 0.104 273.4);

Tailwind

colors: {
  custom: {
    50: '#70709f',
    500: '#313b78',
    950: '#000000',
  },
}

SCSS

$custom: #313b78;
$custom-light: #70709f;
$custom-dark: #000000;

JSON

{
  "hex": "#313b78",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 120
  },
  "hsl": {
    "h": 231.549,
    "s": 42.012,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37764,
    "c": 0.10379,
    "h": 273.4
  },
  "luminance": 0.05137
}

Semantic roles & 50–950 ramp

primary

#313B78

secondary

#A79D5E

accent

#C056D2

background

#F7F6F9

surface

#EDECF2

border

#C8C7CC

text

#08070E

muted

#7B7A7E

Preview Lab

Preview with #313B78

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

Preview Lab → · Contrast checker → · Palette generator →