#3F9FB3#3F9FB3

#3F9FB3 is a light, moderate cyan. Relative luminance 0.291; OKLCH L 65.4% C 0.093 H 213.9°. Best body text is #000000 at 6.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F9FB3
RGB	rgb(63, 159, 179)
HSL	hsl(190, 48%, 47%)
HSV	hsv(190, 65%, 70%)
CMYK	cmyk(64.8%, 11.2%, 0%, 29.8%)
CIE-LAB	lab(60.87, -21.68, -18.68)
CIE-LCH	lch(60.87, 28.62, 220.75°)
OKLab	oklab(65.42% -0.0772 -0.0519)
OKLCH	oklch(65.42% 0.093 213.9)
XYZ	xyz(22.5814, 29.1053, 47.0669)
Luminance	0.2911 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9FB3 #B3533F

analogous

#3FB38D #3F9FB3 #3F65B3

triadic

#3F9FB3 #B33F9F #9FB33F

tetradic

#3F9FB3 #8D3FB3 #B3533F #65B33F

square

#3F9FB3 #8D3FB3 #B3533F #65B33F

split-complementary

#3F9FB3 #B33F65 #B38D3F

monochromatic

#1F4F58 #2F7786 #3F9FB3 #66B8C9 #93CDD9

Accessibility & contrast

On white

3.08

#3F9FB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.82

#3F9FB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9FB3

6.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9FB3	#FFFFFF	#000000	##000000
##3F9FB3	1.00	3.08	6.82	6.82
#FFFFFF	3.08	1.00	21.00	21.00
#000000	6.82	21.00	1.00	1.00
##000000	6.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#909AB4

Deuteranopia (green-blind)

#7F8EB3

Tritanopia (blue-blind)

#00A7A5

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #3f9fb3;
/* rgb */ color: rgb(63, 159, 179);
/* oklch */ color: oklch(65.4% 0.093 213.9);

Tailwind

colors: {
  custom: {
    50: '#81bbc9',
    500: '#3f9fb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f9fb3;
$custom-light: #81bbc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9fb3",
  "rgb": {
    "r": 63,
    "g": 159,
    "b": 179
  },
  "hsl": {
    "h": 190.345,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.65418,
    "c": 0.09307,
    "h": 213.9
  },
  "luminance": 0.29108
}

Semantic roles & 50–950 ramp

primary

#3F9FB3

secondary

#C49489

accent

#6850D8

background

#F8FBFC

surface

#F0F6F8

border

#CBD0D1

text

#0B1213

muted

#7C8182

Preview Lab

Preview with #3F9FB3

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

Preview Lab → · Contrast checker → · Palette generator →