#3131AC#3131AC

#3131AC is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.5% C 0.189 H 274.0°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#3131AC
RGB	rgb(49, 49, 172)
HSL	hsl(240, 56%, 43%)
HSV	hsv(240, 72%, 67%)
CMYK	cmyk(71.5%, 71.5%, 0%, 32.5%)
CIE-LAB	lab(28.97, 40.68, -65.26)
CIE-LCH	lch(28.97, 76.90, 301.94°)
OKLab	oklab(40.48% 0.0131 -0.1887)
OKLCH	oklch(40.48% 0.189 274)
XYZ	xyz(9.8089, 5.8272, 39.6296)
Luminance	0.0583 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3131AC #ACAC31

analogous

#316EAC #3131AC #6E31AC

triadic

#3131AC #AC3131 #31AC31

tetradic

#3131AC #AC316E #ACAC31 #31AC6E

square

#3131AC #AC316E #ACAC31 #31AC6E

split-complementary

#3131AC #AC6E31 #6EAC31

monochromatic

#16164D #23237C #3131AC #4E4ECC #7D7DDA

Accessibility & contrast

On white

9.70

#3131AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#3131AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131AC

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131AC	#FFFFFF	#000000	##FFFFFF
##3131AC	1.00	9.70	2.17	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AB0

Deuteranopia (green-blind)

#003EAA

Tritanopia (blue-blind)

#00536B

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3131ac;
/* rgb */ color: rgb(49, 49, 172);
/* oklch */ color: oklch(40.5% 0.189 274.0);

Tailwind

colors: {
  custom: {
    50: '#7b6ac6',
    500: '#3131ac',
    950: '#000000',
  },
}

SCSS

$custom: #3131ac;
$custom-light: #7b6ac6;
$custom-dark: #000000;

JSON

{
  "hex": "#3131ac",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 172
  },
  "hsl": {
    "h": 240,
    "s": 55.656,
    "l": 43.333
  },
  "oklch": {
    "l": 0.40481,
    "c": 0.18914,
    "h": 274
  },
  "luminance": 0.05828
}

Semantic roles & 50–950 ramp

primary

#3131AC

secondary

#C3C376

accent

#DF49DF

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3131AC

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

Preview Lab → · Contrast checker → · Palette generator →