#3133B8#3133B8

#3133B8 is a dark, highly saturated blue. Relative luminance 0.065; OKLCH L 42.0% C 0.202 H 272.9°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#3133B8
RGB	rgb(49, 51, 184)
HSL	hsl(239, 58%, 46%)
HSV	hsv(239, 73%, 72%)
CMYK	cmyk(73.4%, 72.3%, 0%, 27.8%)
CIE-LAB	lab(30.59, 43.56, -69.74)
CIE-LCH	lch(30.59, 82.23, 301.99°)
OKLab	oklab(42% 0.0101 -0.2018)
OKLCH	oklch(42% 0.202 272.9)
XYZ	xyz(11.0993, 6.4802, 46.0040)
Luminance	0.0648 (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

#3133B8 #B8B631

analogous

#3176B8 #3133B8 #7231B8

triadic

#3133B8 #B83133 #33B831

tetradic

#3133B8 #B83176 #B8B631 #31B872

square

#3133B8 #B83176 #B8B631 #31B872

split-complementary

#3133B8 #B87231 #76B831

monochromatic

#171857 #242688 #3133B8 #5556D2 #8586DE

Accessibility & contrast

On white

9.15

#3133B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#3133B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3133B8

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3133B8	#FFFFFF	#000000	##FFFFFF
##3133B8	1.00	9.15	2.30	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBC

Deuteranopia (green-blind)

#0041B6

Tritanopia (blue-blind)

#005972

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3133b8;
/* rgb */ color: rgb(49, 51, 184);
/* oklch */ color: oklch(42.0% 0.202 272.9);

Tailwind

colors: {
  custom: {
    50: '#7e6ccf',
    500: '#3133b8',
    950: '#000000',
  },
}

SCSS

$custom: #3133b8;
$custom-light: #7e6ccf;
$custom-dark: #000000;

JSON

{
  "hex": "#3133b8",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 184
  },
  "hsl": {
    "h": 239.111,
    "s": 57.94,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42,
    "c": 0.20203,
    "h": 272.9
  },
  "luminance": 0.06481
}

Semantic roles & 50–950 ramp

primary

#3133B8

secondary

#C8C77D

accent

#DF47E1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3133B8

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

Preview Lab → · Contrast checker → · Palette generator →