#31318F#31318F

#31318F is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.7% C 0.151 H 276.3°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#31318F
RGB	rgb(49, 49, 143)
HSL	hsl(240, 49%, 38%)
HSV	hsv(240, 66%, 56%)
CMYK	cmyk(65.7%, 65.7%, 0%, 43.9%)
CIE-LAB	lab(26.25, 30.62, -52.07)
CIE-LCH	lch(26.25, 60.41, 300.46°)
OKLab	oklab(37.68% 0.0167 -0.1501)
OKLCH	oklch(37.68% 0.151 276.3)
XYZ	xyz(7.3212, 4.8322, 26.5282)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31318F #8F8F31

analogous

#31608F #31318F #60318F

triadic

#31318F #8F3131 #318F31

tetradic

#31318F #8F3160 #8F8F31 #318F60

square

#31318F #8F3160 #8F8F31 #318F60

split-complementary

#31318F #8F6031 #608F31

monochromatic

#121234 #212161 #31318F #4141BD #6D6DCD

Accessibility & contrast

On white

10.68

#31318F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#31318F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31318F

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31318F	#FFFFFF	#000000	##FFFFFF
##31318F	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004292

Deuteranopia (green-blind)

#003A8D

Tritanopia (blue-blind)

#00495B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #31318f;
/* rgb */ color: rgb(49, 49, 143);
/* oklch */ color: oklch(37.7% 0.151 276.3);

Tailwind

colors: {
  custom: {
    50: '#7569b1',
    500: '#31318f',
    950: '#000000',
  },
}

SCSS

$custom: #31318f;
$custom-light: #7569b1;
$custom-dark: #000000;

JSON

{
  "hex": "#31318f",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 143
  },
  "hsl": {
    "h": 240,
    "s": 48.958,
    "l": 37.647
  },
  "oklch": {
    "l": 0.37683,
    "c": 0.15103,
    "h": 276.3
  },
  "luminance": 0.04833
}

Semantic roles & 50–950 ramp

primary

#31318F

secondary

#B5B567

accent

#D94FD9

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #31318F

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

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