#3F9BB3#3F9BB3

#3F9BB3 is a light, moderate cyan. Relative luminance 0.278; OKLCH L 64.4% C 0.093 H 218.0°. Best body text is #000000 at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#3F9BB3
RGB	rgb(63, 155, 179)
HSL	hsl(192, 48%, 47%)
HSV	hsv(192, 65%, 70%)
CMYK	cmyk(64.8%, 13.4%, 0%, 29.8%)
CIE-LAB	lab(59.66, -19.59, -20.53)
CIE-LCH	lch(59.66, 28.37, 226.34°)
OKLab	oklab(64.45% -0.073 -0.0571)
OKLCH	oklch(64.45% 0.093 218)
XYZ	xyz(21.9046, 27.7518, 46.8413)
Luminance	0.2775 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9BB3 #B3573F

analogous

#3FB391 #3F9BB3 #3F61B3

triadic

#3F9BB3 #B33F9B #9BB33F

tetradic

#3F9BB3 #913FB3 #B3573F #61B33F

square

#3F9BB3 #913FB3 #B3573F #61B33F

split-complementary

#3F9BB3 #B33F61 #B3913F

monochromatic

#1F4D58 #2F7486 #3F9BB3 #66B5C9 #93CBD9

Accessibility & contrast

On white

3.21

#3F9BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.55

#3F9BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9BB3

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9BB3	#FFFFFF	#000000	##000000
##3F9BB3	1.00	3.21	6.55	6.55
#FFFFFF	3.21	1.00	21.00	21.00
#000000	6.55	21.00	1.00	1.00
##000000	6.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8C97B4

Deuteranopia (green-blind)

#7B8AB3

Tritanopia (blue-blind)

#00A3A3

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #3f9bb3;
/* rgb */ color: rgb(63, 155, 179);
/* oklch */ color: oklch(64.4% 0.093 218.0);

Tailwind

colors: {
  custom: {
    50: '#81b8c9',
    500: '#3f9bb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f9bb3;
$custom-light: #81b8c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9bb3",
  "rgb": {
    "r": 63,
    "g": 155,
    "b": 179
  },
  "hsl": {
    "h": 192.414,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.64446,
    "c": 0.09269,
    "h": 218
  },
  "luminance": 0.27754
}

Semantic roles & 50–950 ramp

primary

#3F9BB3

secondary

#C49689

accent

#6C50D8

background

#F8FBFC

surface

#F0F6F8

border

#CBD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3F9BB3

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

Preview Lab → · Contrast checker → · Palette generator →