#3971CC#3971CC

#3971CC is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.8% C 0.153 H 259.7°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#3971CC
RGB	rgb(57, 113, 204)
HSL	hsl(217, 59%, 51%)
HSV	hsv(217, 72%, 80%)
CMYK	cmyk(72.1%, 44.6%, 0%, 20%)
CIE-LAB	lab(48.31, 12.51, -52.57)
CIE-LCH	lch(48.31, 54.04, 283.39°)
OKLab	oklab(55.82% -0.0274 -0.1505)
OKLCH	oklch(55.82% 0.153 259.7)
XYZ	xyz(18.4876, 17.0377, 59.4293)
Luminance	0.1704 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971CC #CC9439

analogous

#39BACC #3971CC #4A39CC

triadic

#3971CC #CC3971 #71CC39

tetradic

#3971CC #CC39BA #CC9439 #39CC4A

square

#3971CC #CC39BA #CC9439 #39CC4A

split-complementary

#3971CC #CC4A39 #BACC39

monochromatic

#1C3C6E #29569F #3971CC #6A94D9 #9AB7E5

Accessibility & contrast

On white

4.76

#3971CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#3971CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971CC

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971CC	#FFFFFF	#000000	##FFFFFF
##3971CC	1.00	4.76	4.41	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#437ACF

Deuteranopia (green-blind)

#266CCA

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3971cc;
/* rgb */ color: rgb(57, 113, 204);
/* oklch */ color: oklch(55.8% 0.153 259.7);

Tailwind

colors: {
  custom: {
    50: '#8199dc',
    500: '#3971cc',
    950: '#000000',
  },
}

SCSS

$custom: #3971cc;
$custom-light: #8199dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3971cc",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 204
  },
  "hsl": {
    "h": 217.143,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.55824,
    "c": 0.153,
    "h": 259.7
  },
  "luminance": 0.1704
}

Semantic roles & 50–950 ramp

primary

#3971CC

secondary

#D1B890

accent

#A746E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3971CC

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

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