#3733BE#3733BE

#3733BE is a dark, highly saturated blue. Relative luminance 0.069; OKLCH L 43.0% C 0.208 H 274.5°. Best body text is #FFFFFF at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#3733BE
RGB	rgb(55, 51, 190)
HSL	hsl(242, 58%, 47%)
HSV	hsv(242, 73%, 75%)
CMYK	cmyk(71.1%, 73.2%, 0%, 25.5%)
CIE-LAB	lab(31.57, 46.14, -71.66)
CIE-LCH	lch(31.57, 85.23, 302.78°)
OKLab	oklab(42.98% 0.0162 -0.2072)
OKLCH	oklch(42.98% 0.208 274.5)
XYZ	xyz(12.0506, 6.8964, 49.4013)
Luminance	0.0690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.16

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733BE #BABE33

analogous

#3374BE #3733BE #7D33BE

triadic

#3733BE #BE3733 #33BE37

tetradic

#3733BE #BE3374 #BABE33 #33BE7D

square

#3733BE #BE3374 #BABE33 #33BE7D

split-complementary

#3733BE #BE7D33 #74BE33

monochromatic

#1B195E #29268E #3733BE #5F5BD3 #8E8BE0

Accessibility & contrast

On white

8.83

#3733BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3733BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733BE

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733BE	#FFFFFF	#000000	##FFFFFF
##3733BE	1.00	8.83	2.38	8.83
#FFFFFF	8.83	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051C2

Deuteranopia (green-blind)

#0044BB

Tritanopia (blue-blind)

#005B76

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3733be;
/* rgb */ color: rgb(55, 51, 190);
/* oklch */ color: oklch(43.0% 0.208 274.5);

Tailwind

colors: {
  custom: {
    50: '#826cd3',
    500: '#3733be',
    950: '#000000',
  },
}

SCSS

$custom: #3733be;
$custom-light: #826cd3;
$custom-dark: #000000;

JSON

{
  "hex": "#3733be",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 190
  },
  "hsl": {
    "h": 241.727,
    "s": 57.676,
    "l": 47.255
  },
  "oklch": {
    "l": 0.42976,
    "c": 0.20787,
    "h": 274.5
  },
  "luminance": 0.06898
}

Semantic roles & 50–950 ramp

primary

#3733BE

secondary

#C8CA83

accent

#E147DC

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3733BE

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

Preview Lab → · Contrast checker → · Palette generator →