#3133B4#3133B4

#3133B4 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.6% C 0.197 H 273.1°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#3133B4
RGB	rgb(49, 51, 180)
HSL	hsl(239, 57%, 45%)
HSV	hsv(239, 73%, 71%)
CMYK	cmyk(72.8%, 71.7%, 0%, 29.4%)
CIE-LAB	lab(30.19, 42.21, -68.03)
CIE-LCH	lch(30.19, 80.06, 301.82°)
OKLab	oklab(41.59% 0.0107 -0.1968)
OKLCH	oklch(41.59% 0.197 273.1)
XYZ	xyz(10.6859, 6.3148, 43.8269)
Luminance	0.0632 (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

#3133B4 #B4B231

analogous

#3175B4 #3133B4 #7131B4

triadic

#3133B4 #B43133 #33B431

tetradic

#3133B4 #B43175 #B4B231 #31B471

square

#3133B4 #B43175 #B4B231 #31B471

split-complementary

#3133B4 #B47131 #75B431

monochromatic

#171854 #242584 #3133B4 #5254D0 #8284DD

Accessibility & contrast

On white

9.28

#3133B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#3133B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3133B4

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3133B4	#FFFFFF	#000000	##FFFFFF
##3133B4	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DB8

Deuteranopia (green-blind)

#0041B2

Tritanopia (blue-blind)

#005770

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3133b4;
/* rgb */ color: rgb(49, 51, 180);
/* oklch */ color: oklch(41.6% 0.197 273.1);

Tailwind

colors: {
  custom: {
    50: '#7d6ccc',
    500: '#3133b4',
    950: '#000000',
  },
}

SCSS

$custom: #3133b4;
$custom-light: #7d6ccc;
$custom-dark: #000000;

JSON

{
  "hex": "#3133b4",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 180
  },
  "hsl": {
    "h": 239.084,
    "s": 57.205,
    "l": 44.902
  },
  "oklch": {
    "l": 0.41594,
    "c": 0.19706,
    "h": 273.1
  },
  "luminance": 0.06316
}

Semantic roles & 50–950 ramp

primary

#3133B4

secondary

#C6C57B

accent

#DE47E0

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3133B4

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

Preview Lab → · Contrast checker → · Palette generator →