#3131B2#3131B2

#3131B2 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 41.1% C 0.197 H 273.5°. Best body text is #FFFFFF at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#3131B2
RGB	rgb(49, 49, 178)
HSL	hsl(240, 57%, 45%)
HSV	hsv(240, 72%, 70%)
CMYK	cmyk(72.5%, 72.5%, 0%, 30.2%)
CIE-LAB	lab(29.57, 42.71, -67.86)
CIE-LCH	lch(29.57, 80.18, 302.19°)
OKLab	oklab(41.09% 0.0121 -0.1963)
OKLCH	oklch(41.09% 0.197 273.5)
XYZ	xyz(10.3981, 6.0629, 42.7331)
Luminance	0.0606 (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

#3131B2 #B2B231

analogous

#3172B2 #3131B2 #7231B2

triadic

#3131B2 #B23131 #31B231

tetradic

#3131B2 #B23172 #B2B231 #31B272

square

#3131B2 #B23172 #B2B231 #31B272

split-complementary

#3131B2 #B27231 #72B231

monochromatic

#171752 #242482 #3131B2 #5151CF #8181DC

Accessibility & contrast

On white

9.49

#3131B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#3131B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131B2

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131B2	#FFFFFF	#000000	##FFFFFF
##3131B2	1.00	9.49	2.21	9.49
#FFFFFF	9.49	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB6

Deuteranopia (green-blind)

#003FB0

Tritanopia (blue-blind)

#00556E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3131b2;
/* rgb */ color: rgb(49, 49, 178);
/* oklch */ color: oklch(41.1% 0.197 273.5);

Tailwind

colors: {
  custom: {
    50: '#7d6aca',
    500: '#3131b2',
    950: '#000000',
  },
}

SCSS

$custom: #3131b2;
$custom-light: #7d6aca;
$custom-dark: #000000;

JSON

{
  "hex": "#3131b2",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 178
  },
  "hsl": {
    "h": 240,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.41089,
    "c": 0.19665,
    "h": 273.5
  },
  "luminance": 0.06064
}

Semantic roles & 50–950 ramp

primary

#3131B2

secondary

#C5C579

accent

#E048E0

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3131B2

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

Preview Lab → · Contrast checker → · Palette generator →