#3973B9#3973B9

#3973B9 is a mid, vivid cyan. Relative luminance 0.166; OKLCH L 55.1% C 0.125 H 254.6°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#3973B9
RGB	rgb(57, 115, 185)
HSL	hsl(213, 53%, 47%)
HSV	hsv(213, 69%, 73%)
CMYK	cmyk(69.2%, 37.8%, 0%, 27.5%)
CIE-LAB	lab(47.79, 4.36, -42.47)
CIE-LCH	lch(47.79, 42.69, 275.86°)
OKLab	oklab(55.07% -0.0334 -0.1208)
OKLCH	oklch(55.07% 0.125 254.6)
XYZ	xyz(16.5718, 16.6324, 48.2265)
Luminance	0.1663 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973B9 #B97F39

analogous

#39B3B9 #3973B9 #3F39B9

triadic

#3973B9 #B93973 #73B939

tetradic

#3973B9 #B939B3 #B97F39 #39B93F

square

#3973B9 #B939B3 #B97F39 #39B93F

split-complementary

#3973B9 #B93F39 #B3B939

monochromatic

#1C395B #2B568A #3973B9 #6192CE #90B3DD

Accessibility & contrast

On white

4.85

#3973B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#3973B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3973B9

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973B9	#FFFFFF	#000000	##FFFFFF
##3973B9	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5378BC

Deuteranopia (green-blind)

#406CB8

Tritanopia (blue-blind)

#00838D

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3973b9;
/* rgb */ color: rgb(57, 115, 185);
/* oklch */ color: oklch(55.1% 0.125 254.6);

Tailwind

colors: {
  custom: {
    50: '#7e9ace',
    500: '#3973b9',
    950: '#000000',
  },
}

SCSS

$custom: #3973b9;
$custom-light: #7e9ace;
$custom-dark: #000000;

JSON

{
  "hex": "#3973b9",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 185
  },
  "hsl": {
    "h": 212.813,
    "s": 52.893,
    "l": 47.451
  },
  "oklch": {
    "l": 0.55073,
    "c": 0.12534,
    "h": 254.6
  },
  "luminance": 0.16634
}

Semantic roles & 50–950 ramp

primary

#3973B9

secondary

#C8AA86

accent

#9B4BDC

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3973B9

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

Preview Lab → · Contrast checker → · Palette generator →