#3747AD#3747AD

#3747AD is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.8% C 0.163 H 271.4°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#3747AD
RGB	rgb(55, 71, 173)
HSL	hsl(232, 52%, 45%)
HSV	hsv(232, 68%, 68%)
CMYK	cmyk(68.2%, 59%, 0%, 32.2%)
CIE-LAB	lab(34.67, 27.95, -56.51)
CIE-LCH	lch(34.67, 63.05, 296.32°)
OKLab	oklab(44.77% 0.004 -0.1628)
OKLCH	oklch(44.77% 0.163 271.4)
XYZ	xyz(11.3691, 8.3348, 40.5367)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747AD #AD9D37

analogous

#3782AD #3747AD #6237AD

triadic

#3747AD #AD3747 #47AD37

tetradic

#3747AD #AD3782 #AD9D37 #37AD62

square

#3747AD #AD3782 #AD9D37 #37AD62

split-complementary

#3747AD #AD6237 #82AD37

monochromatic

#192150 #28347F #3747AD #5767CA #8691D8

Accessibility & contrast

On white

7.87

#3747AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3747AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747AD

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747AD	#FFFFFF	#000000	##FFFFFF
##3747AD	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B0

Deuteranopia (green-blind)

#004CAB

Tritanopia (blue-blind)

#006073

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3747ad;
/* rgb */ color: rgb(55, 71, 173);
/* oklch */ color: oklch(44.8% 0.163 271.4);

Tailwind

colors: {
  custom: {
    50: '#7c7ac6',
    500: '#3747ad',
    950: '#000000',
  },
}

SCSS

$custom: #3747ad;
$custom-light: #7c7ac6;
$custom-dark: #000000;

JSON

{
  "hex": "#3747ad",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 173
  },
  "hsl": {
    "h": 231.864,
    "s": 51.754,
    "l": 44.706
  },
  "oklch": {
    "l": 0.4477,
    "c": 0.16286,
    "h": 271.4
  },
  "luminance": 0.08336
}

Semantic roles & 50–950 ramp

primary

#3747AD

secondary

#C2B97D

accent

#C84DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3747AD

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

Preview Lab → · Contrast checker → · Palette generator →