#3738B2#3738B2

#3738B2 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.6% C 0.188 H 274.6°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#3738B2
RGB	rgb(55, 56, 178)
HSL	hsl(240, 53%, 46%)
HSV	hsv(240, 69%, 70%)
CMYK	cmyk(69.1%, 68.5%, 0%, 30.2%)
CIE-LAB	lab(31.47, 39.21, -64.72)
CIE-LCH	lch(31.47, 75.67, 301.21°)
OKLab	oklab(42.56% 0.0151 -0.187)
OKLCH	oklch(42.56% 0.188 274.6)
XYZ	xyz(11.0229, 6.8539, 42.8529)
Luminance	0.0685 (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

#3738B2 #B2B137

analogous

#3775B2 #3738B2 #7337B2

triadic

#3738B2 #B23738 #38B237

tetradic

#3738B2 #B23775 #B2B137 #37B273

square

#3738B2 #B23775 #B2B137 #37B273

split-complementary

#3738B2 #B27337 #75B237

monochromatic

#1A1B54 #292983 #3738B2 #5A5BCC #898ADB

Accessibility & contrast

On white

8.86

#3738B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3738B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738B2

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738B2	#FFFFFF	#000000	##FFFFFF
##3738B2	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B6

Deuteranopia (green-blind)

#0044B0

Tritanopia (blue-blind)

#005970

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3738b2;
/* rgb */ color: rgb(55, 56, 178);
/* oklch */ color: oklch(42.6% 0.188 274.6);

Tailwind

colors: {
  custom: {
    50: '#7f6fca',
    500: '#3738b2',
    950: '#000000',
  },
}

SCSS

$custom: #3738b2;
$custom-light: #7f6fca;
$custom-dark: #000000;

JSON

{
  "hex": "#3738b2",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 178
  },
  "hsl": {
    "h": 239.512,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42556,
    "c": 0.18758,
    "h": 274.6
  },
  "luminance": 0.06855
}

Semantic roles & 50–950 ramp

primary

#3738B2

secondary

#C5C480

accent

#DB4CDC

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3738B2

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

Preview Lab → · Contrast checker → · Palette generator →