#3742AA#3742AA

#3742AA is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.6% C 0.165 H 272.8°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#3742AA
RGB	rgb(55, 66, 170)
HSL	hsl(234, 51%, 44%)
HSV	hsv(234, 68%, 67%)
CMYK	cmyk(67.6%, 61.2%, 0%, 33.3%)
CIE-LAB	lab(33.16, 30.12, -57.19)
CIE-LCH	lch(33.16, 64.64, 297.78°)
OKLab	oklab(43.57% 0.0082 -0.1648)
OKLCH	oklch(43.57% 0.165 272.8)
XYZ	xyz(10.7770, 7.6099, 38.9233)
Luminance	0.0761 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3742AA #AA9F37

analogous

#377CAA #3742AA #6637AA

triadic

#3742AA #AA3742 #42AA37

tetradic

#3742AA #AA377C #AA9F37 #37AA66

square

#3742AA #AA377C #AA9F37 #37AA66

split-complementary

#3742AA #AA6637 #7CAA37

monochromatic

#191E4E #28307C #3742AA #5661C8 #848CD7

Accessibility & contrast

On white

8.33

#3742AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#3742AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3742AA

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3742AA	#FFFFFF	#000000	##FFFFFF
##3742AA	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053AD

Deuteranopia (green-blind)

#0049A8

Tritanopia (blue-blind)

#005C6F

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3742aa;
/* rgb */ color: rgb(55, 66, 170);
/* oklch */ color: oklch(43.6% 0.165 272.8);

Tailwind

colors: {
  custom: {
    50: '#7c76c4',
    500: '#3742aa',
    950: '#000000',
  },
}

SCSS

$custom: #3742aa;
$custom-light: #7c76c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3742aa",
  "rgb": {
    "r": 55,
    "g": 66,
    "b": 170
  },
  "hsl": {
    "h": 234.261,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.43573,
    "c": 0.16505,
    "h": 272.8
  },
  "luminance": 0.07611
}

Semantic roles & 50–950 ramp

primary

#3742AA

secondary

#C1BA7C

accent

#CD4DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3742AA

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

Preview Lab → · Contrast checker → · Palette generator →