#313B74#313B74

#313B74 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.5% C 0.098 H 273.3°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#313B74
RGB	rgb(49, 59, 116)
HSL	hsl(231, 41%, 32%)
HSV	hsv(231, 58%, 45%)
CMYK	cmyk(57.8%, 49.1%, 0%, 54.5%)
CIE-LAB	lab(26.85, 14.18, -34.18)
CIE-LCH	lch(26.85, 37.01, 292.52°)
OKLab	oklab(37.48% 0.0056 -0.0974)
OKLCH	oklch(37.48% 0.098 273.3)
XYZ	xyz(5.9819, 5.0414, 17.1775)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313B74 #746A31

analogous

#315C74 #313B74 #493174

triadic

#313B74 #74313B #3B7431

tetradic

#313B74 #74315C #746A31 #317449

square

#313B74 #74315C #746A31 #317449

split-complementary

#313B74 #744931 #5C7431

monochromatic

#0D0F1E #1F2549 #313B74 #43519F #6370BD

Accessibility & contrast

On white

10.46

#313B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#313B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313B74

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313B74	#FFFFFF	#000000	##FFFFFF
##313B74	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214276

Deuteranopia (green-blind)

#183D73

Tritanopia (blue-blind)

#0D4852

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #313b74;
/* rgb */ color: rgb(49, 59, 116);
/* oklch */ color: oklch(37.5% 0.098 273.3);

Tailwind

colors: {
  custom: {
    50: '#6f709c',
    500: '#313b74',
    950: '#000000',
  },
}

SCSS

$custom: #313b74;
$custom-light: #6f709c;
$custom-dark: #000000;

JSON

{
  "hex": "#313b74",
  "rgb": {
    "r": 49,
    "g": 59,
    "b": 116
  },
  "hsl": {
    "h": 231.045,
    "s": 40.606,
    "l": 32.353
  },
  "oklch": {
    "l": 0.37475,
    "c": 0.09759,
    "h": 273.3
  },
  "luminance": 0.05042
}

Semantic roles & 50–950 ramp

primary

#313B74

secondary

#A49A5C

accent

#BE57D0

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#08070E

muted

#7B7A7E

Preview Lab

Preview with #313B74

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

Preview Lab → · Contrast checker → · Palette generator →