#3738AD#3738AD

#3738AD is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.1% C 0.181 H 275.0°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#3738AD
RGB	rgb(55, 56, 173)
HSL	hsl(239, 52%, 45%)
HSV	hsv(239, 68%, 68%)
CMYK	cmyk(68.2%, 67.6%, 0%, 32.2%)
CIE-LAB	lab(31.01, 37.50, -62.49)
CIE-LCH	lch(31.01, 72.88, 300.97°)
OKLab	oklab(42.08% 0.0157 -0.1804)
OKLCH	oklch(42.08% 0.181 275)
XYZ	xyz(10.5301, 6.6567, 40.2570)
Luminance	0.0666 (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

#3738AD #ADAC37

analogous

#3773AD #3738AD #7137AD

triadic

#3738AD #AD3738 #38AD37

tetradic

#3738AD #AD3773 #ADAC37 #37AD71

square

#3738AD #AD3773 #ADAC37 #37AD71

split-complementary

#3738AD #AD7137 #73AD37

monochromatic

#191A50 #28297F #3738AD #5758CA #8687D8

Accessibility & contrast

On white

9.01

#3738AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3738AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738AD

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738AD	#FFFFFF	#000000	##FFFFFF
##3738AD	1.00	9.01	2.33	9.01
#FFFFFF	9.01	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB1

Deuteranopia (green-blind)

#0044AB

Tritanopia (blue-blind)

#00576E

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3738ad;
/* rgb */ color: rgb(55, 56, 173);
/* oklch */ color: oklch(42.1% 0.181 275.0);

Tailwind

colors: {
  custom: {
    50: '#7e6fc6',
    500: '#3738ad',
    950: '#000000',
  },
}

SCSS

$custom: #3738ad;
$custom-light: #7e6fc6;
$custom-dark: #000000;

JSON

{
  "hex": "#3738ad",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 173
  },
  "hsl": {
    "h": 239.492,
    "s": 51.754,
    "l": 44.706
  },
  "oklch": {
    "l": 0.42083,
    "c": 0.18113,
    "h": 275
  },
  "luminance": 0.06658
}

Semantic roles & 50–950 ramp

primary

#3738AD

secondary

#C2C27D

accent

#DA4DDB

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3738AD

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

Preview Lab → · Contrast checker → · Palette generator →