#3971E3#3971E3

#3971E3 is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.4% C 0.184 H 262.5°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3971E3
RGB	rgb(57, 113, 227)
HSL	hsl(220, 75%, 56%)
HSV	hsv(220, 75%, 89%)
CMYK	cmyk(74.9%, 50.2%, 0%, 11%)
CIE-LAB	lab(49.77, 20.95, -63.27)
CIE-LCH	lch(49.77, 66.65, 288.32°)
OKLab	oklab(57.41% -0.024 -0.182)
OKLCH	oklch(57.41% 0.184 262.5)
XYZ	xyz(21.4526, 18.2238, 75.0451)
Luminance	0.1823 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971E3 #E3AB39

analogous

#39C6E3 #3971E3 #5639E3

triadic

#3971E3 #E33971 #71E339

tetradic

#3971E3 #E339C6 #E3AB39 #39E356

square

#3971E3 #E339C6 #E3AB39 #39E356

split-complementary

#3971E3 #E35639 #C6E339

monochromatic

#143C8E #1C53C3 #3971E3 #6F97EB #A4BEF2

Accessibility & contrast

On white

4.52

#3971E3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#3971E3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3971E3

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971E3	#FFFFFF	#000000	##000000
##3971E3	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A7FE7

Deuteranopia (green-blind)

#006FE1

Tritanopia (blue-blind)

#008C9F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3971e3;
/* rgb */ color: rgb(57, 113, 227);
/* oklch */ color: oklch(57.4% 0.184 262.5);

Tailwind

colors: {
  custom: {
    50: '#8699ec',
    500: '#3971e3',
    950: '#000000',
  },
}

SCSS

$custom: #3971e3;
$custom-light: #8699ec;
$custom-dark: #000000;

JSON

{
  "hex": "#3971e3",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 227
  },
  "hsl": {
    "h": 220.235,
    "s": 75.221,
    "l": 55.686
  },
  "oklch": {
    "l": 0.57411,
    "c": 0.18359,
    "h": 262.5
  },
  "luminance": 0.18226
}

Semantic roles & 50–950 ramp

primary

#3971E3

secondary

#DFC899

accent

#B436F2

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3971E3

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

Preview Lab → · Contrast checker → · Palette generator →