#3133B7#3133B7

#3133B7 is a dark, highly saturated blue. Relative luminance 0.064; OKLCH L 41.9% C 0.201 H 272.9°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#3133B7
RGB	rgb(49, 51, 183)
HSL	hsl(239, 58%, 45%)
HSV	hsv(239, 73%, 72%)
CMYK	cmyk(73.2%, 72.1%, 0%, 28.2%)
CIE-LAB	lab(30.49, 43.22, -69.31)
CIE-LCH	lch(30.49, 81.69, 301.95°)
OKLab	oklab(41.9% 0.0103 -0.2005)
OKLCH	oklch(41.9% 0.201 272.9)
XYZ	xyz(10.9948, 6.4384, 45.4539)
Luminance	0.0644 (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

#3133B7 #B7B531

analogous

#3176B7 #3133B7 #7231B7

triadic

#3133B7 #B73133 #33B731

tetradic

#3133B7 #B73176 #B7B531 #31B772

square

#3133B7 #B73176 #B7B531 #31B772

split-complementary

#3133B7 #B77231 #76B731

monochromatic

#171856 #242687 #3133B7 #5456D1 #8486DE

Accessibility & contrast

On white

9.18

#3133B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#3133B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3133B7

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3133B7	#FFFFFF	#000000	##FFFFFF
##3133B7	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBB

Deuteranopia (green-blind)

#0041B5

Tritanopia (blue-blind)

#005872

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3133b7;
/* rgb */ color: rgb(49, 51, 183);
/* oklch */ color: oklch(41.9% 0.201 272.9);

Tailwind

colors: {
  custom: {
    50: '#7e6cce',
    500: '#3133b7',
    950: '#000000',
  },
}

SCSS

$custom: #3133b7;
$custom-light: #7e6cce;
$custom-dark: #000000;

JSON

{
  "hex": "#3133b7",
  "rgb": {
    "r": 49,
    "g": 51,
    "b": 183
  },
  "hsl": {
    "h": 239.104,
    "s": 57.759,
    "l": 45.49
  },
  "oklch": {
    "l": 0.41898,
    "c": 0.20079,
    "h": 272.9
  },
  "luminance": 0.0644
}

Semantic roles & 50–950 ramp

primary

#3133B7

secondary

#C8C67C

accent

#DF47E1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #3133B7

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

Preview Lab → · Contrast checker → · Palette generator →