#3971B7#3971B7

#3971B7 is a mid, vivid cyan. Relative luminance 0.161; OKLCH L 54.5% C 0.125 H 255.2°. Best body text is #FFFFFF at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#3971B7
RGB	rgb(57, 113, 183)
HSL	hsl(213, 53%, 47%)
HSV	hsv(213, 69%, 72%)
CMYK	cmyk(68.9%, 38.3%, 0%, 28.2%)
CIE-LAB	lab(47.10, 4.87, -42.40)
CIE-LCH	lch(47.10, 42.68, 276.55°)
OKLab	oklab(54.5% -0.0319 -0.1207)
OKLCH	oklch(54.5% 0.125 255.2)
XYZ	xyz(16.1366, 16.0973, 47.0472)
Luminance	0.1610 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3971B7 #B77F39

analogous

#39B0B7 #3971B7 #4039B7

triadic

#3971B7 #B73971 #71B739

tetradic

#3971B7 #B739B0 #B77F39 #39B740

square

#3971B7 #B739B0 #B77F39 #39B740

split-complementary

#3971B7 #B74039 #B0B739

monochromatic

#1C375A #2A5488 #3971B7 #6091CD #8EB1DC

Accessibility & contrast

On white

4.98

#3971B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#3971B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3971B7

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3971B7	#FFFFFF	#000000	##FFFFFF
##3971B7	1.00	4.98	4.22	4.98
#FFFFFF	4.98	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5176BA

Deuteranopia (green-blind)

#3F6AB6

Tritanopia (blue-blind)

#00818B

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3971b7;
/* rgb */ color: rgb(57, 113, 183);
/* oklch */ color: oklch(54.5% 0.125 255.2);

Tailwind

colors: {
  custom: {
    50: '#7d99cd',
    500: '#3971b7',
    950: '#000000',
  },
}

SCSS

$custom: #3971b7;
$custom-light: #7d99cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3971b7",
  "rgb": {
    "r": 57,
    "g": 113,
    "b": 183
  },
  "hsl": {
    "h": 213.333,
    "s": 52.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.54499,
    "c": 0.12481,
    "h": 255.2
  },
  "luminance": 0.16099
}

Semantic roles & 50–950 ramp

primary

#3971B7

secondary

#C7AA85

accent

#9C4CDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3971B7

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

Preview Lab → · Contrast checker → · Palette generator →