#31437B#31437B

#31437B is a dark, moderate blue. Relative luminance 0.061; OKLCH L 39.8% C 0.097 H 268.3°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#31437B
RGB	rgb(49, 67, 123)
HSL	hsl(225, 43%, 34%)
HSV	hsv(225, 60%, 48%)
CMYK	cmyk(60.2%, 45.5%, 0%, 51.8%)
CIE-LAB	lab(29.66, 11.26, -34.12)
CIE-LCH	lch(29.66, 35.93, 288.27°)
OKLab	oklab(39.76% -0.0028 -0.0971)
OKLCH	oklch(39.76% 0.097 268.3)
XYZ	xyz(6.8477, 6.0968, 19.5510)
Luminance	0.0610 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31437B #7B6931

analogous

#31687B #31437B #44317B

triadic

#31437B #7B3143 #437B31

tetradic

#31437B #7B3168 #7B6931 #317B44

square

#31437B #7B3168 #7B6931 #317B44

split-complementary

#31437B #7B4431 #687B31

monochromatic

#0E1323 #202B4F #31437B #425BA7 #657BC2

Accessibility & contrast

On white

9.46

#31437B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#31437B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31437B

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31437B	#FFFFFF	#000000	##FFFFFF
##31437B	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A497D

Deuteranopia (green-blind)

#20437A

Tritanopia (blue-blind)

#004F59

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #31437b;
/* rgb */ color: rgb(49, 67, 123);
/* oklch */ color: oklch(39.8% 0.097 268.3);

Tailwind

colors: {
  custom: {
    50: '#7076a1',
    500: '#31437b',
    950: '#000000',
  },
}

SCSS

$custom: #31437b;
$custom-light: #7076a1;
$custom-dark: #000000;

JSON

{
  "hex": "#31437b",
  "rgb": {
    "r": 49,
    "g": 67,
    "b": 123
  },
  "hsl": {
    "h": 225.405,
    "s": 43.023,
    "l": 33.725
  },
  "oklch": {
    "l": 0.3976,
    "c": 0.09718,
    "h": 268.3
  },
  "luminance": 0.06097
}

Semantic roles & 50–950 ramp

primary

#31437B

secondary

#A9975F

accent

#B455D3

background

#F7F7FA

surface

#EDEDF3

border

#C8C8CD

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #31437B

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

Preview Lab → · Contrast checker → · Palette generator →