#3971B5#3971B5

#3971B5 is a mid, vivid cyan. Relative luminance 0.160; OKLCH L 54.4% C 0.122 H 254.6°. Best body text is #FFFFFF at 5.00:1 contrast (WCAG AA passes).

Color values

HEX	#3971B5
RGB	rgb(57, 113, 181)
HSL	hsl(213, 52%, 47%)
HSV	hsv(213, 69%, 71%)
CMYK	cmyk(68.5%, 37.6%, 0%, 29%)
CIE-LAB	lab(46.99, 4.15, -41.42)
CIE-LCH	lch(46.99, 41.62, 275.72°)
OKLab	oklab(54.38% -0.0324 -0.1178)
OKLCH	oklch(54.38% 0.122 254.6)
XYZ	xyz(15.9299, 16.0147, 45.9587)
Luminance	0.1602 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971B5 #B57D39

analogous

#39AFB5 #3971B5 #3F39B5

triadic

#3971B5 #B53971 #71B539

tetradic

#3971B5 #B539AF #B57D39 #39B53F

square

#3971B5 #B539AF #B57D39 #39B53F

split-complementary

#3971B5 #B53F39 #AFB539

monochromatic

#1C3758 #2A5486 #3971B5 #5F90CD #8DB0DB

Accessibility & contrast

On white

5.00

#3971B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.20

#3971B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971B5

5.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971B5	#FFFFFF	#000000	##FFFFFF
##3971B5	1.00	5.00	4.20	5.00
#FFFFFF	5.00	1.00	21.00	1.00
#000000	4.20	21.00	1.00	21.00
##FFFFFF	5.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5276B8

Deuteranopia (green-blind)

#406AB4

Tritanopia (blue-blind)

#00818A

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #3971b5;
/* rgb */ color: rgb(57, 113, 181);
/* oklch */ color: oklch(54.4% 0.122 254.6);

Tailwind

colors: {
  custom: {
    50: '#7d99cb',
    500: '#3971b5',
    950: '#000000',
  },
}

SCSS

$custom: #3971b5;
$custom-light: #7d99cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3971b5",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 181
  },
  "hsl": {
    "h": 212.903,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.54379,
    "c": 0.12215,
    "h": 254.6
  },
  "luminance": 0.16016
}

Semantic roles & 50–950 ramp

primary

#3971B5

secondary

#C6A884

accent

#9B4CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3971B5

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

Preview Lab → · Contrast checker → · Palette generator →