#31378B#31378B

#31378B is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.4% C 0.138 H 274.8°. Best body text is #FFFFFF at 10.24:1 contrast (WCAG AA passes).

Color values

HEX	#31378B
RGB	rgb(49, 55, 139)
HSL	hsl(236, 48%, 37%)
HSV	hsv(236, 65%, 55%)
CMYK	cmyk(64.7%, 60.4%, 0%, 45.5%)
CIE-LAB	lab(27.43, 25.25, -47.67)
CIE-LCH	lch(27.43, 53.94, 297.91°)
OKLab	oklab(38.45% 0.0115 -0.1371)
OKLCH	oklch(38.45% 0.138 274.8)
XYZ	xyz(7.2915, 5.2488, 25.0500)
Luminance	0.0525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31378B #8B8531

analogous

#31648B #31378B #58318B

triadic

#31378B #8B3137 #378B31

tetradic

#31378B #8B3164 #8B8531 #318B58

square

#31378B #8B3164 #8B8531 #318B58

split-complementary

#31378B #8B5831 #648B31

monochromatic

#111331 #21255E #31378B #4149B8 #6B72CB

Accessibility & contrast

On white

10.24

#31378B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#31378B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31378B

10.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31378B	#FFFFFF	#000000	##FFFFFF
##31378B	1.00	10.24	2.05	10.24
#FFFFFF	10.24	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#004B5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #31378b;
/* rgb */ color: rgb(49, 55, 139);
/* oklch */ color: oklch(38.4% 0.138 274.8);

Tailwind

colors: {
  custom: {
    50: '#746dae',
    500: '#31378b',
    950: '#000000',
  },
}

SCSS

$custom: #31378b;
$custom-light: #746dae;
$custom-dark: #000000;

JSON

{
  "hex": "#31378b",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 139
  },
  "hsl": {
    "h": 236,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.38447,
    "c": 0.13761,
    "h": 274.8
  },
  "luminance": 0.05249
}

Semantic roles & 50–950 ramp

primary

#31378B

secondary

#B2AD65

accent

#CE50D7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #31378B

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

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