#3743AA#3743AA

#3743AA is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.8% C 0.164 H 272.6°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#3743AA
RGB	rgb(55, 67, 170)
HSL	hsl(234, 51%, 44%)
HSV	hsv(234, 68%, 67%)
CMYK	cmyk(67.6%, 60.6%, 0%, 33.3%)
CIE-LAB	lab(33.41, 29.47, -56.78)
CIE-LCH	lch(33.41, 63.97, 297.43°)
OKLab	oklab(43.76% 0.0074 -0.1636)
OKLCH	oklch(43.76% 0.164 272.6)
XYZ	xyz(10.8360, 7.7278, 38.9430)
Luminance	0.0773 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3743AA #AA9E37

analogous

#377DAA #3743AA #6537AA

triadic

#3743AA #AA3743 #43AA37

tetradic

#3743AA #AA377D #AA9E37 #37AA65

square

#3743AA #AA377D #AA9E37 #37AA65

split-complementary

#3743AA #AA6537 #7DAA37

monochromatic

#191F4E #28317C #3743AA #5662C8 #848DD7

Accessibility & contrast

On white

8.25

#3743AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3743AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743AA

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743AA	#FFFFFF	#000000	##FFFFFF
##3743AA	1.00	8.25	2.55	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054AD

Deuteranopia (green-blind)

#0049A8

Tritanopia (blue-blind)

#005D70

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3743aa;
/* rgb */ color: rgb(55, 67, 170);
/* oklch */ color: oklch(43.8% 0.164 272.6);

Tailwind

colors: {
  custom: {
    50: '#7c77c4',
    500: '#3743aa',
    950: '#000000',
  },
}

SCSS

$custom: #3743aa;
$custom-light: #7c77c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3743aa",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 170
  },
  "hsl": {
    "h": 233.739,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.4376,
    "c": 0.1638,
    "h": 272.6
  },
  "luminance": 0.07729
}

Semantic roles & 50–950 ramp

primary

#3743AA

secondary

#C1BA7C

accent

#CC4DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3743AA

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

Preview Lab → · Contrast checker → · Palette generator →