#3971B8#3971B8

#3971B8 is a mid, vivid cyan. Relative luminance 0.161; OKLCH L 54.6% C 0.126 H 255.5°. Best body text is #FFFFFF at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#3971B8
RGB	rgb(57, 113, 184)
HSL	hsl(214, 53%, 47%)
HSV	hsv(214, 69%, 72%)
CMYK	cmyk(69%, 38.6%, 0%, 27.8%)
CIE-LAB	lab(47.16, 5.23, -42.90)
CIE-LCH	lch(47.16, 43.22, 276.95°)
OKLab	oklab(54.56% -0.0316 -0.1221)
OKLCH	oklch(54.56% 0.126 255.5)
XYZ	xyz(16.2410, 16.1391, 47.5973)
Luminance	0.1614 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971B8 #B88039

analogous

#39B1B8 #3971B8 #4039B8

triadic

#3971B8 #B83971 #71B839

tetradic

#3971B8 #B839B1 #B88039 #39B840

square

#3971B8 #B839B1 #B88039 #39B840

split-complementary

#3971B8 #B84039 #B1B839

monochromatic

#1C385B #2B5489 #3971B8 #6091CE #8FB1DC

Accessibility & contrast

On white

4.97

#3971B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.23

#3971B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971B8

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971B8	#FFFFFF	#000000	##FFFFFF
##3971B8	1.00	4.97	4.23	4.97
#FFFFFF	4.97	1.00	21.00	1.00
#000000	4.23	21.00	1.00	21.00
##FFFFFF	4.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5176BB

Deuteranopia (green-blind)

#3E6AB7

Tritanopia (blue-blind)

#00818B

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3971b8;
/* rgb */ color: rgb(57, 113, 184);
/* oklch */ color: oklch(54.6% 0.126 255.5);

Tailwind

colors: {
  custom: {
    50: '#7e99ce',
    500: '#3971b8',
    950: '#000000',
  },
}

SCSS

$custom: #3971b8;
$custom-light: #7e99ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3971b8",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 184
  },
  "hsl": {
    "h": 213.543,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.54559,
    "c": 0.12615,
    "h": 255.5
  },
  "luminance": 0.16141
}

Semantic roles & 50–950 ramp

primary

#3971B8

secondary

#C7AA86

accent

#9C4CDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3971B8

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

Preview Lab → · Contrast checker → · Palette generator →