#3947B0#3947B0

#3947B0 is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.1% C 0.166 H 272.1°. Best body text is #FFFFFF at 7.77:1 contrast (WCAG AA passes).

Color values

HEX	#3947B0
RGB	rgb(57, 71, 176)
HSL	hsl(233, 51%, 46%)
HSV	hsv(233, 68%, 69%)
CMYK	cmyk(67.6%, 59.7%, 0%, 31%)
CIE-LAB	lab(35.02, 29.32, -57.72)
CIE-LCH	lch(35.02, 64.74, 296.93°)
OKLab	oklab(45.14% 0.0062 -0.1663)
OKLCH	oklch(45.14% 0.166 272.1)
XYZ	xyz(11.7744, 8.5098, 42.0879)
Luminance	0.0851 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3947B0 #B0A239

analogous

#3982B0 #3947B0 #6639B0

triadic

#3947B0 #B03947 #47B039

tetradic

#3947B0 #B03982 #B0A239 #39B066

square

#3947B0 #B03982 #B0A239 #39B066

split-complementary

#3947B0 #B06639 #82B039

monochromatic

#1B2254 #2A3482 #3947B0 #5C69CA #8A94D9

Accessibility & contrast

On white

7.77

#3947B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#3947B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3947B0

7.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3947B0	#FFFFFF	#000000	##FFFFFF
##3947B0	1.00	7.77	2.70	7.77
#FFFFFF	7.77	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B3

Deuteranopia (green-blind)

#004DAE

Tritanopia (blue-blind)

#006174

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3947b0;
/* rgb */ color: rgb(57, 71, 176);
/* oklch */ color: oklch(45.1% 0.166 272.1);

Tailwind

colors: {
  custom: {
    50: '#7e7ac8',
    500: '#3947b0',
    950: '#000000',
  },
}

SCSS

$custom: #3947b0;
$custom-light: #7e7ac8;
$custom-dark: #000000;

JSON

{
  "hex": "#3947b0",
  "rgb": {
    "r": 57,
    "g": 71,
    "b": 176
  },
  "hsl": {
    "h": 232.941,
    "s": 51.073,
    "l": 45.686
  },
  "oklch": {
    "l": 0.45137,
    "c": 0.16641,
    "h": 272.1
  },
  "luminance": 0.08511
}

Semantic roles & 50–950 ramp

primary

#3947B0

secondary

#C4BC81

accent

#CA4DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3947B0

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

Preview Lab → · Contrast checker → · Palette generator →