#3971C3#3971C3

#3971C3 is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.2% C 0.141 H 258.0°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#3971C3
RGB	rgb(57, 113, 195)
HSL	hsl(216, 55%, 49%)
HSV	hsv(216, 71%, 76%)
CMYK	cmyk(70.8%, 42.1%, 0%, 23.5%)
CIE-LAB	lab(47.78, 9.22, -48.26)
CIE-LCH	lch(47.78, 49.14, 280.82°)
OKLab	oklab(55.24% -0.0292 -0.1379)
OKLCH	oklch(55.24% 0.141 258)
XYZ	xyz(17.4392, 16.6184, 53.9078)
Luminance	0.1662 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971C3 #C38B39

analogous

#39B6C3 #3971C3 #4639C3

triadic

#3971C3 #C33971 #71C339

tetradic

#3971C3 #C339B6 #C38B39 #39C346

square

#3971C3 #C339B6 #C38B39 #39C346

split-complementary

#3971C3 #C34639 #B6C339

monochromatic

#1D3A64 #2B5694 #3971C3 #6792D2 #96B4E0

Accessibility & contrast

On white

4.86

#3971C3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#3971C3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971C3

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971C3	#FFFFFF	#000000	##FFFFFF
##3971C3	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A78C6

Deuteranopia (green-blind)

#336BC1

Tritanopia (blue-blind)

#008490

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3971c3;
/* rgb */ color: rgb(57, 113, 195);
/* oklch */ color: oklch(55.2% 0.141 258.0);

Tailwind

colors: {
  custom: {
    50: '#8099d5',
    500: '#3971c3',
    950: '#000000',
  },
}

SCSS

$custom: #3971c3;
$custom-light: #8099d5;
$custom-dark: #000000;

JSON

{
  "hex": "#3971c3",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 195
  },
  "hsl": {
    "h": 215.652,
    "s": 54.762,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55241,
    "c": 0.14091,
    "h": 258
  },
  "luminance": 0.1662
}

Semantic roles & 50–950 ramp

primary

#3971C3

secondary

#CCB28C

accent

#A24ADE

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3971C3

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

Preview Lab → · Contrast checker → · Palette generator →