#3971C6#3971C6

#3971C6 is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.4% C 0.145 H 258.6°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#3971C6
RGB	rgb(57, 113, 198)
HSL	hsl(216, 55%, 50%)
HSV	hsv(216, 71%, 78%)
CMYK	cmyk(71.2%, 42.9%, 0%, 22.4%)
CIE-LAB	lab(47.95, 10.32, -49.71)
CIE-LCH	lch(47.95, 50.77, 281.73°)
OKLab	oklab(55.43% -0.0286 -0.1421)
OKLCH	oklch(55.43% 0.145 258.6)
XYZ	xyz(17.7818, 16.7554, 55.7121)
Luminance	0.1676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971C6 #C68E39

analogous

#39B8C6 #3971C6 #4739C6

triadic

#3971C6 #C63971 #71C639

tetradic

#3971C6 #C639B8 #C68E39 #39C647

square

#3971C6 #C639B8 #C68E39 #39C647

split-complementary

#3971C6 #C64739 #B8C639

monochromatic

#1E3B67 #2B5696 #3971C6 #6993D4 #98B5E1

Accessibility & contrast

On white

4.83

#3971C6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#3971C6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971C6

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971C6	#FFFFFF	#000000	##FFFFFF
##3971C6	1.00	4.83	4.35	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4879C9

Deuteranopia (green-blind)

#2F6CC4

Tritanopia (blue-blind)

#008592

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3971c6;
/* rgb */ color: rgb(57, 113, 198);
/* oklch */ color: oklch(55.4% 0.145 258.6);

Tailwind

colors: {
  custom: {
    50: '#8099d8',
    500: '#3971c6',
    950: '#000000',
  },
}

SCSS

$custom: #3971c6;
$custom-light: #8099d8;
$custom-dark: #000000;

JSON

{
  "hex": "#3971c6",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 198
  },
  "hsl": {
    "h": 216.17,
    "s": 55.294,
    "l": 50
  },
  "oklch": {
    "l": 0.55433,
    "c": 0.14494,
    "h": 258.6
  },
  "luminance": 0.16757
}

Semantic roles & 50–950 ramp

primary

#3971C6

secondary

#CDB48E

accent

#A349DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #3971C6

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

Preview Lab → · Contrast checker → · Palette generator →