#3973BB#3973BB

#3973BB is a mid, vivid cyan. Relative luminance 0.167; OKLCH L 55.2% C 0.128 H 255.1°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#3973BB
RGB	rgb(57, 115, 187)
HSL	hsl(213, 53%, 48%)
HSV	hsv(213, 70%, 73%)
CMYK	cmyk(69.5%, 38.5%, 0%, 26.7%)
CIE-LAB	lab(47.90, 5.08, -43.45)
CIE-LCH	lch(47.90, 43.74, 276.67°)
OKLab	oklab(55.19% -0.0329 -0.1237)
OKLCH	oklch(55.19% 0.128 255.1)
XYZ	xyz(16.7844, 16.7174, 49.3463)
Luminance	0.1672 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973BB #BB8139

analogous

#39B4BB #3973BB #4039BB

triadic

#3973BB #BB3973 #73BB39

tetradic

#3973BB #BB39B4 #BB8139 #39BB40

square

#3973BB #BB39B4 #BB8139 #39BB40

split-complementary

#3973BB #BB4039 #B4BB39

monochromatic

#1C395D #2B568C #3973BB #6293CF #91B3DD

Accessibility & contrast

On white

4.83

#3973BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#3973BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3973BB

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973BB	#FFFFFF	#000000	##FFFFFF
##3973BB	1.00	4.83	4.34	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5278BE

Deuteranopia (green-blind)

#3F6CBA

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3973bb;
/* rgb */ color: rgb(57, 115, 187);
/* oklch */ color: oklch(55.2% 0.128 255.1);

Tailwind

colors: {
  custom: {
    50: '#7e9ad0',
    500: '#3973bb',
    950: '#000000',
  },
}

SCSS

$custom: #3973bb;
$custom-light: #7e9ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#3973bb",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 187
  },
  "hsl": {
    "h": 213.231,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.55193,
    "c": 0.128,
    "h": 255.1
  },
  "luminance": 0.16719
}

Semantic roles & 50–950 ramp

primary

#3973BB

secondary

#C8AB87

accent

#9C4BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3973BB

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

Preview Lab → · Contrast checker → · Palette generator →