#3738AA#3738AA

#3738AA is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.8% C 0.177 H 275.2°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#3738AA
RGB	rgb(55, 56, 170)
HSL	hsl(239, 51%, 44%)
HSV	hsv(239, 68%, 67%)
CMYK	cmyk(67.6%, 67.1%, 0%, 33.3%)
CIE-LAB	lab(30.74, 36.47, -61.14)
CIE-LCH	lch(30.74, 71.19, 300.82°)
OKLab	oklab(41.8% 0.016 -0.1765)
OKLCH	oklch(41.8% 0.177 275.2)
XYZ	xyz(10.2430, 6.5419, 38.7453)
Luminance	0.0654 (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

#3738AA #AAA937

analogous

#3772AA #3738AA #7037AA

triadic

#3738AA #AA3738 #38AA37

tetradic

#3738AA #AA3772 #AAA937 #37AA70

square

#3738AA #AA3772 #AAA937 #37AA70

split-complementary

#3738AA #AA7037 #72AA37

monochromatic

#191A4E #28297C #3738AA #5657C8 #8485D7

Accessibility & contrast

On white

9.10

#3738AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#3738AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738AA

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738AA	#FFFFFF	#000000	##FFFFFF
##3738AA	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAE

Deuteranopia (green-blind)

#0043A8

Tritanopia (blue-blind)

#00566C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3738aa;
/* rgb */ color: rgb(55, 56, 170);
/* oklch */ color: oklch(41.8% 0.177 275.2);

Tailwind

colors: {
  custom: {
    50: '#7d6fc4',
    500: '#3738aa',
    950: '#000000',
  },
}

SCSS

$custom: #3738aa;
$custom-light: #7d6fc4;
$custom-dark: #000000;

JSON

{
  "hex": "#3738aa",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 170
  },
  "hsl": {
    "h": 239.478,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.41803,
    "c": 0.17721,
    "h": 275.2
  },
  "luminance": 0.06543
}

Semantic roles & 50–950 ramp

primary

#3738AA

secondary

#C1C07C

accent

#D94DDB

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3738AA

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

Preview Lab → · Contrast checker → · Palette generator →