#3133AB#3133AB

#3133AB is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.7% C 0.186 H 273.7°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#3133AB
RGB	rgb(49, 51, 171)
HSL	hsl(239, 55%, 43%)
HSV	hsv(239, 71%, 67%)
CMYK	cmyk(71.3%, 70.2%, 0%, 32.9%)
CIE-LAB	lab(29.31, 39.14, -64.10)
CIE-LCH	lch(29.31, 75.11, 301.41°)
OKLab	oklab(40.7% 0.012 -0.1853)
OKLCH	oklch(40.7% 0.186 273.7)
XYZ	xyz(9.7987, 5.9599, 39.1542)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.20

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3133AB #ABA931

analogous

#3170AB #3133AB #6C31AB

triadic

#3133AB #AB3133 #33AB31

tetradic

#3133AB #AB3170 #ABA931 #31AB6C

square

#3133AB #AB3170 #ABA931 #31AB6C

split-complementary

#3133AB #AB6C31 #70AB31

monochromatic

#16174C #23257B #3133AB #4D4FCC #7D7EDA

Accessibility & contrast

On white

9.58

#3133AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#3133AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3133AB

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3133AB	#FFFFFF	#000000	##FFFFFF
##3133AB	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BAF

Deuteranopia (green-blind)

#003FA9

Tritanopia (blue-blind)

#00546B

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3133ab;
/* rgb */ color: rgb(49, 51, 171);
/* oklch */ color: oklch(40.7% 0.186 273.7);

Tailwind

colors: {
  custom: {
    50: '#7b6bc5',
    500: '#3133ab',
    950: '#000000',
  },
}

SCSS

$custom: #3133ab;
$custom-light: #7b6bc5;
$custom-dark: #000000;

JSON

{
  "hex": "#3133ab",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 171
  },
  "hsl": {
    "h": 239.016,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.40695,
    "c": 0.18571,
    "h": 273.7
  },
  "luminance": 0.05961
}

Semantic roles & 50–950 ramp

primary

#3133AB

secondary

#C2C175

accent

#DC49DF

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3133AB

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

Preview Lab → · Contrast checker → · Palette generator →