#3947B1#3947B1

#3947B1 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.2% C 0.168 H 272.1°. Best body text is #FFFFFF at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#3947B1
RGB	rgb(57, 71, 177)
HSL	hsl(233, 51%, 46%)
HSV	hsv(233, 68%, 69%)
CMYK	cmyk(67.8%, 59.9%, 0%, 30.6%)
CIE-LAB	lab(35.10, 29.68, -58.18)
CIE-LCH	lch(35.10, 65.32, 297.03°)
OKLab	oklab(45.22% 0.0062 -0.1677)
OKLCH	oklch(45.22% 0.168 272.1)
XYZ	xyz(11.8737, 8.5496, 42.6109)
Luminance	0.0855 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3947B1 #B1A339

analogous

#3983B1 #3947B1 #6739B1

triadic

#3947B1 #B13947 #47B139

tetradic

#3947B1 #B13983 #B1A339 #39B167

square

#3947B1 #B13983 #B1A339 #39B167

split-complementary

#3947B1 #B16739 #83B139

monochromatic

#1B2254 #2A3483 #3947B1 #5D69CB #8B94DA

Accessibility & contrast

On white

7.75

#3947B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#3947B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3947B1

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3947B1	#FFFFFF	#000000	##FFFFFF
##3947B1	1.00	7.75	2.71	7.75
#FFFFFF	7.75	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B5

Deuteranopia (green-blind)

#004DAF

Tritanopia (blue-blind)

#006175

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3947b1;
/* rgb */ color: rgb(57, 71, 177);
/* oklch */ color: oklch(45.2% 0.168 272.1);

Tailwind

colors: {
  custom: {
    50: '#7e7ac9',
    500: '#3947b1',
    950: '#000000',
  },
}

SCSS

$custom: #3947b1;
$custom-light: #7e7ac9;
$custom-dark: #000000;

JSON

{
  "hex": "#3947b1",
  "rgb": {
    "r": 57,
    "g": 71,
    "b": 177
  },
  "hsl": {
    "h": 233,
    "s": 51.282,
    "l": 45.882
  },
  "oklch": {
    "l": 0.45221,
    "c": 0.16778,
    "h": 272.1
  },
  "luminance": 0.08551
}

Semantic roles & 50–950 ramp

primary

#3947B1

secondary

#C4BC82

accent

#CA4DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3947B1

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

Preview Lab → · Contrast checker → · Palette generator →