#3133B1#3133B1

#3133B1 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 41.3% C 0.193 H 273.3°. Best body text is #FFFFFF at 9.38:1 contrast (WCAG AA passes).

Color values

HEX	#3133B1
RGB	rgb(49, 51, 177)
HSL	hsl(239, 57%, 44%)
HSV	hsv(239, 72%, 69%)
CMYK	cmyk(72.3%, 71.2%, 0%, 30.6%)
CIE-LAB	lab(29.90, 41.19, -66.73)
CIE-LCH	lch(29.90, 78.42, 301.69°)
OKLab	oklab(41.29% 0.0112 -0.193)
OKLCH	oklch(41.29% 0.193 273.3)
XYZ	xyz(10.3836, 6.1939, 42.2348)
Luminance	0.0619 (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

#3133B1 #B1AF31

analogous

#3173B1 #3133B1 #6F31B1

triadic

#3133B1 #B13133 #33B131

tetradic

#3133B1 #B13173 #B1AF31 #31B16F

square

#3133B1 #B13173 #B1AF31 #31B16F

split-complementary

#3133B1 #B16F31 #73B131

monochromatic

#161751 #242581 #3133B1 #5152CF #8082DC

Accessibility & contrast

On white

9.38

#3133B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#3133B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3133B1

9.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3133B1	#FFFFFF	#000000	##FFFFFF
##3133B1	1.00	9.38	2.24	9.38
#FFFFFF	9.38	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB5

Deuteranopia (green-blind)

#0040AF

Tritanopia (blue-blind)

#00566E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3133b1;
/* rgb */ color: rgb(49, 51, 177);
/* oklch */ color: oklch(41.3% 0.193 273.3);

Tailwind

colors: {
  custom: {
    50: '#7c6cc9',
    500: '#3133b1',
    950: '#000000',
  },
}

SCSS

$custom: #3133b1;
$custom-light: #7c6cc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3133b1",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 177
  },
  "hsl": {
    "h": 239.063,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.41292,
    "c": 0.1933,
    "h": 273.3
  },
  "luminance": 0.06195
}

Semantic roles & 50–950 ramp

primary

#3133B1

secondary

#C5C479

accent

#DE48E0

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3133B1

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

Preview Lab → · Contrast checker → · Palette generator →