#3947B3#3947B3

#3947B3 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.4% C 0.171 H 272.1°. Best body text is #FFFFFF at 7.70:1 contrast (WCAG AA passes).

Color values

HEX	#3947B3
RGB	rgb(57, 71, 179)
HSL	hsl(233, 52%, 46%)
HSV	hsv(233, 68%, 70%)
CMYK	cmyk(68.2%, 60.3%, 0%, 29.8%)
CIE-LAB	lab(35.26, 30.40, -59.11)
CIE-LCH	lch(35.26, 66.47, 297.21°)
OKLab	oklab(45.39% 0.0061 -0.1704)
OKLCH	oklch(45.39% 0.171 272.1)
XYZ	xyz(12.0745, 8.6299, 43.6685)
Luminance	0.0863 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3947B3 #B3A539

analogous

#3984B3 #3947B3 #6839B3

triadic

#3947B3 #B33947 #47B339

tetradic

#3947B3 #B33984 #B3A539 #39B368

square

#3947B3 #B33984 #B3A539 #39B368

split-complementary

#3947B3 #B36839 #84B339

monochromatic

#1B2256 #2A3585 #3947B3 #5E6ACC #8C95DA

Accessibility & contrast

On white

7.70

#3947B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#3947B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3947B3

7.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3947B3	#FFFFFF	#000000	##FFFFFF
##3947B3	1.00	7.70	2.73	7.70
#FFFFFF	7.70	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B7

Deuteranopia (green-blind)

#004EB1

Tritanopia (blue-blind)

#006276

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3947b3;
/* rgb */ color: rgb(57, 71, 179);
/* oklch */ color: oklch(45.4% 0.171 272.1);

Tailwind

colors: {
  custom: {
    50: '#7e7acb',
    500: '#3947b3',
    950: '#000000',
  },
}

SCSS

$custom: #3947b3;
$custom-light: #7e7acb;
$custom-dark: #000000;

JSON

{
  "hex": "#3947b3",
  "rgb": {
    "r": 57,
    "g": 71,
    "b": 179
  },
  "hsl": {
    "h": 233.115,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.45389,
    "c": 0.1705,
    "h": 272.1
  },
  "luminance": 0.08631
}

Semantic roles & 50–950 ramp

primary

#3947B3

secondary

#C5BD83

accent

#CB4DDB

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3947B3

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

Preview Lab → · Contrast checker → · Palette generator →