#3133B3#3133B3

#3133B3 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.5% C 0.196 H 273.2°. Best body text is #FFFFFF at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#3133B3
RGB	rgb(49, 51, 179)
HSL	hsl(239, 57%, 45%)
HSV	hsv(239, 73%, 70%)
CMYK	cmyk(72.6%, 71.5%, 0%, 29.8%)
CIE-LAB	lab(30.09, 41.87, -67.59)
CIE-LCH	lch(30.09, 79.51, 301.78°)
OKLab	oklab(41.49% 0.0109 -0.1955)
OKLCH	oklch(41.49% 0.196 273.2)
XYZ	xyz(10.5844, 6.2742, 43.2923)
Luminance	0.0628 (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

#3133B3 #B3B131

analogous

#3174B3 #3133B3 #7031B3

triadic

#3133B3 #B33133 #33B331

tetradic

#3133B3 #B33174 #B3B131 #31B370

square

#3133B3 #B33174 #B3B131 #31B370

split-complementary

#3133B3 #B37031 #74B331

monochromatic

#171853 #242583 #3133B3 #5254D0 #8283DD

Accessibility & contrast

On white

9.31

#3133B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#3133B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3133B3

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3133B3	#FFFFFF	#000000	##FFFFFF
##3133B3	1.00	9.31	2.26	9.31
#FFFFFF	9.31	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DB7

Deuteranopia (green-blind)

#0041B1

Tritanopia (blue-blind)

#00576F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3133b3;
/* rgb */ color: rgb(49, 51, 179);
/* oklch */ color: oklch(41.5% 0.196 273.2);

Tailwind

colors: {
  custom: {
    50: '#7d6ccb',
    500: '#3133b3',
    950: '#000000',
  },
}

SCSS

$custom: #3133b3;
$custom-light: #7d6ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#3133b3",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 179
  },
  "hsl": {
    "h": 239.077,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.41493,
    "c": 0.19581,
    "h": 273.2
  },
  "luminance": 0.06275
}

Semantic roles & 50–950 ramp

primary

#3133B3

secondary

#C6C57A

accent

#DE48E0

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3133B3

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

Preview Lab → · Contrast checker → · Palette generator →