#313B79#313B79

#313B79 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.8% C 0.105 H 273.4°. Best body text is #FFFFFF at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#313B79
RGB	rgb(49, 59, 121)
HSL	hsl(232, 42%, 33%)
HSV	hsv(232, 60%, 47%)
CMYK	cmyk(59.5%, 51.2%, 0%, 52.5%)
CIE-LAB	lab(27.19, 15.99, -36.81)
CIE-LCH	lch(27.19, 40.13, 293.48°)
OKLab	oklab(37.84% 0.0063 -0.1051)
OKLCH	oklch(37.84% 0.105 273.4)
XYZ	xyz(6.2807, 5.1609, 18.7506)
Luminance	0.0516 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B79 #796F31

analogous

#315F79 #313B79 #4B3179

triadic

#313B79 #79313B #3B7931

tetradic

#313B79 #79315F #796F31 #31794B

square

#313B79 #79315F #796F31 #31794B

split-complementary

#313B79 #794B31 #5F7931

monochromatic

#0E1122 #1F264D #313B79 #4350A5 #6471C0

Accessibility & contrast

On white

10.33

#313B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#313B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B79

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B79	#FFFFFF	#000000	##FFFFFF
##313B79	1.00	10.33	2.03	10.33
#FFFFFF	10.33	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C437B

Deuteranopia (green-blind)

#103D78

Tritanopia (blue-blind)

#034954

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #313b79;
/* rgb */ color: rgb(49, 59, 121);
/* oklch */ color: oklch(37.8% 0.105 273.4);

Tailwind

colors: {
  custom: {
    50: '#7070a0',
    500: '#313b79',
    950: '#000000',
  },
}

SCSS

$custom: #313b79;
$custom-light: #7070a0;
$custom-dark: #000000;

JSON

{
  "hex": "#313b79",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 121
  },
  "hsl": {
    "h": 231.667,
    "s": 42.353,
    "l": 33.333
  },
  "oklch": {
    "l": 0.37838,
    "c": 0.10533,
    "h": 273.4
  },
  "luminance": 0.05161
}

Semantic roles & 50–950 ramp

primary

#313B79

secondary

#A89D5E

accent

#C156D2

background

#F7F6F9

surface

#EDECF2

border

#C8C7CC

text

#08070F

muted

#7B7A7E

Preview Lab

Preview with #313B79

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

Preview Lab → · Contrast checker → · Palette generator →