#3647AB#3647AB

#3647AB is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.5% C 0.160 H 271.1°. Best body text is #FFFFFF at 7.94:1 contrast (WCAG AA passes).

Color values

HEX	#3647AB
RGB	rgb(54, 71, 171)
HSL	hsl(231, 52%, 44%)
HSV	hsv(231, 68%, 67%)
CMYK	cmyk(68.4%, 58.5%, 0%, 32.9%)
CIE-LAB	lab(34.46, 27.08, -55.67)
CIE-LCH	lch(34.46, 61.91, 295.94°)
OKLab	oklab(44.55% 0.003 -0.1604)
OKLCH	oklch(44.55% 0.16 271.1)
XYZ	xyz(11.1228, 8.2300, 39.5226)
Luminance	0.0823 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3647AB #AB9A36

analogous

#3682AB #3647AB #6036AB

triadic

#3647AB #AB3647 #47AB36

tetradic

#3647AB #AB3682 #AB9A36 #36AB60

square

#3647AB #AB3682 #AB9A36 #36AB60

split-complementary

#3647AB #AB6036 #82AB36

monochromatic

#19204E #27347C #3647AB #5566C9 #8390D8

Accessibility & contrast

On white

7.94

#3647AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#3647AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3647AB

7.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3647AB	#FFFFFF	#000000	##FFFFFF
##3647AB	1.00	7.94	2.65	7.94
#FFFFFF	7.94	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056AE

Deuteranopia (green-blind)

#004CA9

Tritanopia (blue-blind)

#006072

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3647ab;
/* rgb */ color: rgb(54, 71, 171);
/* oklch */ color: oklch(44.5% 0.160 271.1);

Tailwind

colors: {
  custom: {
    50: '#7b7ac5',
    500: '#3647ab',
    950: '#000000',
  },
}

SCSS

$custom: #3647ab;
$custom-light: #7b7ac5;
$custom-dark: #000000;

JSON

{
  "hex": "#3647ab",
  "rgb": {
    "r": 54,
    "g": 71,
    "b": 171
  },
  "hsl": {
    "h": 231.282,
    "s": 52,
    "l": 44.118
  },
  "oklch": {
    "l": 0.44547,
    "c": 0.16039,
    "h": 271.1
  },
  "luminance": 0.08231
}

Semantic roles & 50–950 ramp

primary

#3647AB

secondary

#C2B77B

accent

#C74CDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3647AB

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

Preview Lab → · Contrast checker → · Palette generator →