#3947B7#3947B7

#3947B7 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.7% C 0.176 H 272.0°. Best body text is #FFFFFF at 7.61:1 contrast (WCAG AA passes).

Color values

HEX	#3947B7
RGB	rgb(57, 71, 183)
HSL	hsl(233, 53%, 47%)
HSV	hsv(233, 69%, 72%)
CMYK	cmyk(68.9%, 61.2%, 0%, 28.2%)
CIE-LAB	lab(35.58, 31.82, -60.95)
CIE-LCH	lch(35.58, 68.75, 297.57°)
OKLab	oklab(45.73% 0.0061 -0.1758)
OKLCH	oklch(45.73% 0.176 272)
XYZ	xyz(12.4849, 8.7940, 45.8300)
Luminance	0.0880 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3947B7 #B7A939

analogous

#3986B7 #3947B7 #6A39B7

triadic

#3947B7 #B73947 #47B739

tetradic

#3947B7 #B73986 #B7A939 #39B76A

square

#3947B7 #B73986 #B7A939 #39B76A

split-complementary

#3947B7 #B76A39 #86B739

monochromatic

#1C235A #2A3588 #3947B7 #606CCD #8E97DC

Accessibility & contrast

On white

7.61

#3947B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#3947B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3947B7

7.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3947B7	#FFFFFF	#000000	##FFFFFF
##3947B7	1.00	7.61	2.76	7.61
#FFFFFF	7.61	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ABB

Deuteranopia (green-blind)

#004EB5

Tritanopia (blue-blind)

#006378

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3947b7;
/* rgb */ color: rgb(57, 71, 183);
/* oklch */ color: oklch(45.7% 0.176 272.0);

Tailwind

colors: {
  custom: {
    50: '#7f7acd',
    500: '#3947b7',
    950: '#000000',
  },
}

SCSS

$custom: #3947b7;
$custom-light: #7f7acd;
$custom-dark: #000000;

JSON

{
  "hex": "#3947b7",
  "rgb": {
    "r": 57,
    "g": 71,
    "b": 183
  },
  "hsl": {
    "h": 233.333,
    "s": 52.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.45728,
    "c": 0.17588,
    "h": 272
  },
  "luminance": 0.08795
}

Semantic roles & 50–950 ramp

primary

#3947B7

secondary

#C7BF85

accent

#CC4CDC

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3947B7

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

Preview Lab → · Contrast checker → · Palette generator →