#3133B5#3133B5

#3133B5 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.7% C 0.198 H 273.1°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#3133B5
RGB	rgb(49, 51, 181)
HSL	hsl(239, 57%, 45%)
HSV	hsv(239, 73%, 71%)
CMYK	cmyk(72.9%, 71.8%, 0%, 29%)
CIE-LAB	lab(30.29, 42.55, -68.46)
CIE-LCH	lch(30.29, 80.60, 301.86°)
OKLab	oklab(41.7% 0.0106 -0.198)
OKLCH	oklch(41.7% 0.198 273.1)
XYZ	xyz(10.7881, 6.3557, 44.3653)
Luminance	0.0636 (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

#3133B5 #B5B331

analogous

#3175B5 #3133B5 #7131B5

triadic

#3133B5 #B53133 #33B531

tetradic

#3133B5 #B53175 #B5B331 #31B571

square

#3133B5 #B53175 #B5B331 #31B571

split-complementary

#3133B5 #B57131 #75B531

monochromatic

#171855 #242585 #3133B5 #5355D0 #8384DD

Accessibility & contrast

On white

9.25

#3133B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#3133B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3133B5

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3133B5	#FFFFFF	#000000	##FFFFFF
##3133B5	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB9

Deuteranopia (green-blind)

#0041B3

Tritanopia (blue-blind)

#005870

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3133b5;
/* rgb */ color: rgb(49, 51, 181);
/* oklch */ color: oklch(41.7% 0.198 273.1);

Tailwind

colors: {
  custom: {
    50: '#7d6ccc',
    500: '#3133b5',
    950: '#000000',
  },
}

SCSS

$custom: #3133b5;
$custom-light: #7d6ccc;
$custom-dark: #000000;

JSON

{
  "hex": "#3133b5",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 181
  },
  "hsl": {
    "h": 239.091,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.41695,
    "c": 0.19831,
    "h": 273.1
  },
  "luminance": 0.06357
}

Semantic roles & 50–950 ramp

primary

#3133B5

secondary

#C7C67B

accent

#DE47E1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #3133B5

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

Preview Lab → · Contrast checker → · Palette generator →