#31338B#31338B

#31338B is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.7% C 0.143 H 276.1°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#31338B
RGB	rgb(49, 51, 139)
HSL	hsl(239, 48%, 37%)
HSV	hsv(239, 65%, 55%)
CMYK	cmyk(64.7%, 63.3%, 0%, 45.5%)
CIE-LAB	lab(26.40, 27.90, -49.34)
CIE-LCH	lch(26.40, 56.68, 299.48°)
OKLab	oklab(37.69% 0.0152 -0.1421)
OKLCH	oklch(37.69% 0.143 276.1)
XYZ	xyz(7.1091, 4.8841, 24.9892)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31338B #8B8931

analogous

#31608B #31338B #5C318B

triadic

#31338B #8B3133 #338B31

tetradic

#31338B #8B3160 #8B8931 #318B5C

square

#31338B #8B3160 #8B8931 #318B5C

split-complementary

#31338B #8B5C31 #608B31

monochromatic

#111231 #21225E #31338B #4144B8 #6B6ECB

Accessibility & contrast

On white

10.62

#31338B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#31338B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31338B

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31338B	#FFFFFF	#000000	##FFFFFF
##31338B	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428E

Deuteranopia (green-blind)

#003B89

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #31338b;
/* rgb */ color: rgb(49, 51, 139);
/* oklch */ color: oklch(37.7% 0.143 276.1);

Tailwind

colors: {
  custom: {
    50: '#746bae',
    500: '#31338b',
    950: '#000000',
  },
}

SCSS

$custom: #31338b;
$custom-light: #746bae;
$custom-dark: #000000;

JSON

{
  "hex": "#31338b",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 139
  },
  "hsl": {
    "h": 238.667,
    "s": 47.872,
    "l": 36.863
  },
  "oklch": {
    "l": 0.37687,
    "c": 0.1429,
    "h": 276.1
  },
  "luminance": 0.04885
}

Semantic roles & 50–950 ramp

primary

#31338B

secondary

#B2B165

accent

#D450D7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090610

muted

#7B7A7F

Preview Lab

Preview with #31338B

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

Preview Lab → · Contrast checker → · Palette generator →