#31388C#31388C

#31388C is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.7% C 0.138 H 274.4°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#31388C
RGB	rgb(49, 56, 140)
HSL	hsl(235, 48%, 37%)
HSV	hsv(235, 65%, 55%)
CMYK	cmyk(65%, 60%, 0%, 45.1%)
CIE-LAB	lab(27.77, 24.94, -47.73)
CIE-LCH	lch(27.77, 53.85, 297.59°)
OKLab	oklab(38.73% 0.0105 -0.1373)
OKLCH	oklch(38.73% 0.138 274.4)
XYZ	xyz(7.4129, 5.3741, 25.4525)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31388C #8C8531

analogous

#31658C #31388C #58318C

triadic

#31388C #8C3138 #388C31

tetradic

#31388C #8C3165 #8C8531 #318C58

square

#31388C #8C3165 #8C8531 #318C58

split-complementary

#31388C #8C5831 #658C31

monochromatic

#111431 #21265F #31388C #414AB9 #6C73CC

Accessibility & contrast

On white

10.12

#31388C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#31388C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31388C

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31388C	#FFFFFF	#000000	##FFFFFF
##31388C	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468F

Deuteranopia (green-blind)

#003E8A

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #31388c;
/* rgb */ color: rgb(49, 56, 140);
/* oklch */ color: oklch(38.7% 0.138 274.4);

Tailwind

colors: {
  custom: {
    50: '#746eae',
    500: '#31388c',
    950: '#000000',
  },
}

SCSS

$custom: #31388c;
$custom-light: #746eae;
$custom-dark: #000000;

JSON

{
  "hex": "#31388c",
  "rgb": {
    "r": 49,
    "g": 56,
    "b": 140
  },
  "hsl": {
    "h": 235.385,
    "s": 48.148,
    "l": 37.059
  },
  "oklch": {
    "l": 0.38726,
    "c": 0.1377,
    "h": 274.4
  },
  "luminance": 0.05375
}

Semantic roles & 50–950 ramp

primary

#31388C

secondary

#B3AD66

accent

#CD50D8

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #31388C

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

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