#3973B8#3973B8

#3973B8 is a mid, vivid cyan. Relative luminance 0.166; OKLCH L 55.0% C 0.124 H 254.3°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#3973B8
RGB	rgb(57, 115, 184)
HSL	hsl(213, 53%, 47%)
HSV	hsv(213, 69%, 72%)
CMYK	cmyk(69%, 37.5%, 0%, 27.8%)
CIE-LAB	lab(47.74, 4.00, -41.97)
CIE-LCH	lch(47.74, 42.16, 275.44°)
OKLab	oklab(55.01% -0.0336 -0.1194)
OKLCH	oklch(55.01% 0.124 254.3)
XYZ	xyz(16.4666, 16.5903, 47.6725)
Luminance	0.1659 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973B8 #B87E39

analogous

#39B3B8 #3973B8 #3E39B8

triadic

#3973B8 #B83973 #73B839

tetradic

#3973B8 #B839B3 #B87E39 #39B83E

square

#3973B8 #B839B3 #B87E39 #39B83E

split-complementary

#3973B8 #B83E39 #B3B839

monochromatic

#1C395B #2B5689 #3973B8 #6092CE #8FB2DC

Accessibility & contrast

On white

4.86

#3973B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#3973B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3973B8

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973B8	#FFFFFF	#000000	##FFFFFF
##3973B8	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5478BB

Deuteranopia (green-blind)

#416CB7

Tritanopia (blue-blind)

#00838D

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3973b8;
/* rgb */ color: rgb(57, 115, 184);
/* oklch */ color: oklch(55.0% 0.124 254.3);

Tailwind

colors: {
  custom: {
    50: '#7e9acd',
    500: '#3973b8',
    950: '#000000',
  },
}

SCSS

$custom: #3973b8;
$custom-light: #7e9acd;
$custom-dark: #000000;

JSON

{
  "hex": "#3973b8",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 184
  },
  "hsl": {
    "h": 212.598,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.55014,
    "c": 0.12402,
    "h": 254.3
  },
  "luminance": 0.16592
}

Semantic roles & 50–950 ramp

primary

#3973B8

secondary

#C7A986

accent

#9A4CDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3973B8

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

Preview Lab → · Contrast checker → · Palette generator →