#3971C8#3971C8

#3971C8 is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.6% C 0.148 H 259.0°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#3971C8
RGB	rgb(57, 113, 200)
HSL	hsl(217, 57%, 50%)
HSV	hsv(217, 72%, 78%)
CMYK	cmyk(71.5%, 43.5%, 0%, 21.6%)
CIE-LAB	lab(48.07, 11.05, -50.66)
CIE-LCH	lch(48.07, 51.86, 282.30°)
OKLab	oklab(55.56% -0.0282 -0.1449)
OKLCH	oklch(55.56% 0.148 259)
XYZ	xyz(18.0140, 16.8483, 56.9351)
Luminance	0.1685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971C8 #C89039

analogous

#39B9C8 #3971C8 #4839C8

triadic

#3971C8 #C83971 #71C839

tetradic

#3971C8 #C839B9 #C89039 #39C848

square

#3971C8 #C839B9 #C89039 #39C848

split-complementary

#3971C8 #C84839 #B9C839

monochromatic

#1D3B69 #2B5699 #3971C8 #6993D5 #99B6E3

Accessibility & contrast

On white

4.81

#3971C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#3971C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971C8

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971C8	#FFFFFF	#000000	##FFFFFF
##3971C8	1.00	4.81	4.37	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4679CB

Deuteranopia (green-blind)

#2C6CC6

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3971c8;
/* rgb */ color: rgb(57, 113, 200);
/* oklch */ color: oklch(55.6% 0.148 259.0);

Tailwind

colors: {
  custom: {
    50: '#8199d9',
    500: '#3971c8',
    950: '#000000',
  },
}

SCSS

$custom: #3971c8;
$custom-light: #8199d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3971c8",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 200
  },
  "hsl": {
    "h": 216.503,
    "s": 56.522,
    "l": 50.392
  },
  "oklch": {
    "l": 0.55562,
    "c": 0.14763,
    "h": 259
  },
  "luminance": 0.1685
}

Semantic roles & 50–950 ramp

primary

#3971C8

secondary

#CEB58F

accent

#A448E0

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3971C8

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

Preview Lab → · Contrast checker → · Palette generator →