#31387B#31387B

#31387B is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.3% C 0.113 H 275.1°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#31387B
RGB	rgb(49, 56, 123)
HSL	hsl(234, 43%, 34%)
HSV	hsv(234, 60%, 48%)
CMYK	cmyk(60.2%, 54.5%, 0%, 51.8%)
CIE-LAB	lab(26.48, 18.76, -39.21)
CIE-LCH	lch(26.48, 43.47, 295.57°)
OKLab	oklab(37.35% 0.0099 -0.1122)
OKLCH	oklch(37.35% 0.113 275.1)
XYZ	xyz(6.2548, 4.9109, 19.3533)
Luminance	0.0491 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31387B #7B7431

analogous

#315D7B #31387B #4F317B

triadic

#31387B #7B3138 #387B31

tetradic

#31387B #7B315D #7B7431 #317B4F

square

#31387B #7B315D #7B7431 #317B4F

split-complementary

#31387B #7B4F31 #5D7B31

monochromatic

#0E1023 #20244F #31387B #424CA7 #656EC2

Accessibility & contrast

On white

10.59

#31387B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#31387B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31387B

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31387B	#FFFFFF	#000000	##FFFFFF
##31387B	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#11427D

Deuteranopia (green-blind)

#013C7A

Tritanopia (blue-blind)

#004754

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #31387b;
/* rgb */ color: rgb(49, 56, 123);
/* oklch */ color: oklch(37.3% 0.113 275.1);

Tailwind

colors: {
  custom: {
    50: '#706ea2',
    500: '#31387b',
    950: '#000000',
  },
}

SCSS

$custom: #31387b;
$custom-light: #706ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#31387b",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 123
  },
  "hsl": {
    "h": 234.324,
    "s": 43.023,
    "l": 33.725
  },
  "oklch": {
    "l": 0.37348,
    "c": 0.11268,
    "h": 275.1
  },
  "luminance": 0.04911
}

Semantic roles & 50–950 ramp

primary

#31387B

secondary

#A9A25F

accent

#C755D3

background

#F7F6FA

surface

#EDEBF3

border

#C8C6CD

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #31387B

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

Preview Lab → · Contrast checker → · Palette generator →