#3133BB#3133BB

#3133BB is a dark, highly saturated blue. Relative luminance 0.066; OKLCH L 42.3% C 0.206 H 272.7°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#3133BB
RGB	rgb(49, 51, 187)
HSL	hsl(239, 58%, 46%)
HSV	hsv(239, 74%, 73%)
CMYK	cmyk(73.8%, 72.7%, 0%, 26.7%)
CIE-LAB	lab(30.90, 44.57, -71.02)
CIE-LCH	lch(30.90, 83.84, 302.11°)
OKLab	oklab(42.31% 0.0096 -0.2055)
OKLCH	oklch(42.31% 0.206 272.7)
XYZ	xyz(11.4171, 6.6073, 47.6777)
Luminance	0.0661 (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

#3133BB #BBB931

analogous

#3178BB #3133BB #7431BB

triadic

#3133BB #BB3133 #33BB31

tetradic

#3133BB #BB3178 #BBB931 #31BB74

square

#3133BB #BB3178 #BBB931 #31BB74

split-complementary

#3133BB #BB7431 #78BB31

monochromatic

#18195A #24268B #3133BB #5658D3 #8788E0

Accessibility & contrast

On white

9.05

#3133BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3133BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3133BB

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3133BB	#FFFFFF	#000000	##FFFFFF
##3133BB	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBF

Deuteranopia (green-blind)

#0042B9

Tritanopia (blue-blind)

#005A74

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3133bb;
/* rgb */ color: rgb(49, 51, 187);
/* oklch */ color: oklch(42.3% 0.206 272.7);

Tailwind

colors: {
  custom: {
    50: '#7f6cd1',
    500: '#3133bb',
    950: '#000000',
  },
}

SCSS

$custom: #3133bb;
$custom-light: #7f6cd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3133bb",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 187
  },
  "hsl": {
    "h": 239.13,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42307,
    "c": 0.20573,
    "h": 272.7
  },
  "luminance": 0.06608
}

Semantic roles & 50–950 ramp

primary

#3133BB

secondary

#C9C87F

accent

#DF46E2

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3133BB

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

Preview Lab → · Contrast checker → · Palette generator →