#3738BE#3738BE

#3738BE is a dark, highly saturated blue. Relative luminance 0.074; OKLCH L 43.7% C 0.203 H 273.8°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#3738BE
RGB	rgb(55, 56, 190)
HSL	hsl(240, 55%, 48%)
HSV	hsv(240, 71%, 75%)
CMYK	cmyk(71.1%, 70.5%, 0%, 25.5%)
CIE-LAB	lab(32.61, 43.26, -69.96)
CIE-LCH	lch(32.61, 82.25, 301.73°)
OKLab	oklab(43.72% 0.0135 -0.2023)
OKLCH	oklch(43.72% 0.203 273.8)
XYZ	xyz(12.2809, 7.3571, 49.4781)
Luminance	0.0736 (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

#3738BE #BEBD37

analogous

#377BBE #3738BE #7A37BE

triadic

#3738BE #BE3738 #38BE37

tetradic

#3738BE #BE377B #BEBD37 #37BE7A

square

#3738BE #BE377B #BEBD37 #37BE7A

split-complementary

#3738BE #BE7A37 #7BBE37

monochromatic

#1C1C5F #292A8F #3738BE #6162D1 #9091DF

Accessibility & contrast

On white

8.50

#3738BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#3738BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738BE

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738BE	#FFFFFF	#000000	##FFFFFF
##3738BE	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C2

Deuteranopia (green-blind)

#0046BC

Tritanopia (blue-blind)

#005D77

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3738be;
/* rgb */ color: rgb(55, 56, 190);
/* oklch */ color: oklch(43.7% 0.203 273.8);

Tailwind

colors: {
  custom: {
    50: '#8170d3',
    500: '#3738be',
    950: '#000000',
  },
}

SCSS

$custom: #3738be;
$custom-light: #8170d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3738be",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 190
  },
  "hsl": {
    "h": 239.556,
    "s": 55.102,
    "l": 48.039
  },
  "oklch": {
    "l": 0.43717,
    "c": 0.20273,
    "h": 273.8
  },
  "luminance": 0.07358
}

Semantic roles & 50–950 ramp

primary

#3738BE

secondary

#CAC987

accent

#DD49DE

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3738BE

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

Preview Lab → · Contrast checker → · Palette generator →