#3947A0#3947A0

#3947A0 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.8% C 0.144 H 272.3°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#3947A0
RGB	rgb(57, 71, 160)
HSL	hsl(232, 47%, 43%)
HSV	hsv(232, 64%, 63%)
CMYK	cmyk(64.4%, 55.6%, 0%, 37.3%)
CIE-LAB	lab(33.80, 23.59, -50.13)
CIE-LCH	lch(33.80, 55.41, 295.20°)
OKLab	oklab(43.84% 0.0058 -0.144)
OKLCH	oklch(43.84% 0.144 272.3)
XYZ	xyz(10.2836, 7.9135, 34.2364)
Luminance	0.0791 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3947A0 #A09239

analogous

#397AA0 #3947A0 #5F39A0

triadic

#3947A0 #A03947 #47A039

tetradic

#3947A0 #A0397A #A09239 #39A05F

square

#3947A0 #A0397A #A09239 #39A05F

split-complementary

#3947A0 #A05F39 #7AA039

monochromatic

#191F46 #293373 #3947A0 #5463C2 #818CD2

Accessibility & contrast

On white

8.13

#3947A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3947A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3947A0

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3947A0	#FFFFFF	#000000	##FFFFFF
##3947A0	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0254A3

Deuteranopia (green-blind)

#004B9E

Tritanopia (blue-blind)

#005C6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3947a0;
/* rgb */ color: rgb(57, 71, 160);
/* oklch */ color: oklch(43.8% 0.144 272.3);

Tailwind

colors: {
  custom: {
    50: '#7b7abd',
    500: '#3947a0',
    950: '#000000',
  },
}

SCSS

$custom: #3947a0;
$custom-light: #7b7abd;
$custom-dark: #000000;

JSON

{
  "hex": "#3947a0",
  "rgb": {
    "r": 57,
    "g": 71,
    "b": 160
  },
  "hsl": {
    "h": 231.845,
    "s": 47.465,
    "l": 42.549
  },
  "oklch": {
    "l": 0.43842,
    "c": 0.14412,
    "h": 272.3
  },
  "luminance": 0.07914
}

Semantic roles & 50–950 ramp

primary

#3947A0

secondary

#BCB379

accent

#C551D7

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#0A0912

muted

#7C7B81

Preview Lab

Preview with #3947A0

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

Preview Lab → · Contrast checker → · Palette generator →