#31288B#31288B

#31288B is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.8% C 0.157 H 279.0°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#31288B
RGB	rgb(49, 40, 139)
HSL	hsl(245, 55%, 35%)
HSV	hsv(245, 71%, 55%)
CMYK	cmyk(64.7%, 71.2%, 0%, 45.5%)
CIE-LAB	lab(23.78, 34.90, -53.63)
CIE-LCH	lch(23.78, 63.98, 303.06°)
OKLab	oklab(35.78% 0.0245 -0.1547)
OKLCH	oklch(35.78% 0.157 279)
XYZ	xyz(6.6841, 4.0341, 24.8475)
Luminance	0.0403 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31288B #828B28

analogous

#28508B #31288B #63288B

triadic

#31288B #8B3128 #288B31

tetradic

#31288B #8B2850 #828B28 #288B63

square

#31288B #8B2850 #828B28 #288B63

split-complementary

#31288B #8B6328 #508B28

monochromatic

#0F0D2C #201A5B #31288B #4236BB #685DD0

Accessibility & contrast

On white

11.62

#31288B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#31288B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31288B

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31288B	#FFFFFF	#000000	##FFFFFF
##31288B	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8E

Deuteranopia (green-blind)

#003589

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #31288b;
/* rgb */ color: rgb(49, 40, 139);
/* oklch */ color: oklch(35.8% 0.157 279.0);

Tailwind

colors: {
  custom: {
    50: '#7563ae',
    500: '#31288b',
    950: '#000000',
  },
}

SCSS

$custom: #31288b;
$custom-light: #7563ae;
$custom-dark: #000000;

JSON

{
  "hex": "#31288b",
  "rgb": {
    "r": 49,
    "g": 40,
    "b": 139
  },
  "hsl": {
    "h": 245.455,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.35785,
    "c": 0.15661,
    "h": 279
  },
  "luminance": 0.04035
}

Semantic roles & 50–950 ramp

primary

#31288B

secondary

#ADB659

accent

#DF49D1

background

#F7F5FA

surface

#EEEAF4

border

#C9C6CE

text

#090510

muted

#7B797F

Preview Lab

Preview with #31288B

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

Preview Lab → · Contrast checker → · Palette generator →