#3131A5#3131A5

#3131A5 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.8% C 0.180 H 274.5°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#3131A5
RGB	rgb(49, 49, 165)
HSL	hsl(240, 54%, 42%)
HSV	hsv(240, 70%, 65%)
CMYK	cmyk(70.3%, 70.3%, 0%, 35.3%)
CIE-LAB	lab(28.29, 38.29, -62.17)
CIE-LCH	lch(28.29, 73.02, 301.63°)
OKLab	oklab(39.78% 0.0141 -0.1797)
OKLCH	oklch(39.78% 0.18 274.5)
XYZ	xyz(9.1542, 5.5653, 36.1818)
Luminance	0.0557 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3131A5 #A5A531

analogous

#316BA5 #3131A5 #6B31A5

triadic

#3131A5 #A53131 #31A531

tetradic

#3131A5 #A5316B #A5A531 #31A56B

square

#3131A5 #A5316B #A5A531 #31A56B

split-complementary

#3131A5 #A56B31 #6BA531

monochromatic

#151547 #232376 #3131A5 #4A4AC9 #7979D7

Accessibility & contrast

On white

9.94

#3131A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#3131A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131A5

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131A5	#FFFFFF	#000000	##FFFFFF
##3131A5	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048A9

Deuteranopia (green-blind)

#003DA3

Tritanopia (blue-blind)

#005167

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3131a5;
/* rgb */ color: rgb(49, 49, 165);
/* oklch */ color: oklch(39.8% 0.180 274.5);

Tailwind

colors: {
  custom: {
    50: '#7a6ac1',
    500: '#3131a5',
    950: '#000000',
  },
}

SCSS

$custom: #3131a5;
$custom-light: #7a6ac1;
$custom-dark: #000000;

JSON

{
  "hex": "#3131a5",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 165
  },
  "hsl": {
    "h": 240,
    "s": 54.206,
    "l": 41.961
  },
  "oklch": {
    "l": 0.39783,
    "c": 0.18022,
    "h": 274.5
  },
  "luminance": 0.05566
}

Semantic roles & 50–950 ramp

primary

#3131A5

secondary

#C0C072

accent

#DE4ADE

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #3131A5

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

Preview Lab → · Contrast checker → · Palette generator →