#3971BF#3971BF

#3971BF is a mid, vivid cyan. Relative luminance 0.164; OKLCH L 55.0% C 0.136 H 257.2°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3971BF
RGB	rgb(57, 113, 191)
HSL	hsl(215, 54%, 49%)
HSV	hsv(215, 70%, 75%)
CMYK	cmyk(70.2%, 40.8%, 0%, 25.1%)
CIE-LAB	lab(47.55, 7.77, -46.32)
CIE-LCH	lch(47.55, 46.97, 279.52°)
OKLab	oklab(54.99% -0.03 -0.1322)
OKLCH	oklch(54.99% 0.136 257.2)
XYZ	xyz(16.9930, 16.4399, 51.5578)
Luminance	0.1644 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971BF #BF8739

analogous

#39B4BF #3971BF #4439BF

triadic

#3971BF #BF3971 #71BF39

tetradic

#3971BF #BF39B4 #BF8739 #39BF44

square

#3971BF #BF39B4 #BF8739 #39BF44

split-complementary

#3971BF #BF4439 #B4BF39

monochromatic

#1D3961 #2B5590 #3971BF #6492D1 #93B3DF

Accessibility & contrast

On white

4.90

#3971BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#3971BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971BF

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971BF	#FFFFFF	#000000	##FFFFFF
##3971BF	1.00	4.90	4.29	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D78C2

Deuteranopia (green-blind)

#376BBD

Tritanopia (blue-blind)

#00838F

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3971bf;
/* rgb */ color: rgb(57, 113, 191);
/* oklch */ color: oklch(55.0% 0.136 257.2);

Tailwind

colors: {
  custom: {
    50: '#7f99d3',
    500: '#3971bf',
    950: '#000000',
  },
}

SCSS

$custom: #3971bf;
$custom-light: #7f99d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3971bf",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 191
  },
  "hsl": {
    "h": 214.925,
    "s": 54.032,
    "l": 48.627
  },
  "oklch": {
    "l": 0.54989,
    "c": 0.13554,
    "h": 257.2
  },
  "luminance": 0.16442
}

Semantic roles & 50–950 ramp

primary

#3971BF

secondary

#CAAF8A

accent

#A04ADD

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3971BF

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

Preview Lab → · Contrast checker → · Palette generator →