#3F9BB1#3F9BB1

#3F9BB1 is a light, moderate cyan. Relative luminance 0.277; OKLCH L 64.4% C 0.092 H 216.3°. Best body text is #000000 at 6.53:1 contrast (WCAG AA passes).

Color values

HEX	#3F9BB1
RGB	rgb(63, 155, 177)
HSL	hsl(192, 48%, 47%)
HSV	hsv(192, 64%, 69%)
CMYK	cmyk(64.4%, 12.4%, 0%, 30.6%)
CIE-LAB	lab(59.59, -20.21, -19.51)
CIE-LCH	lch(59.59, 28.09, 223.98°)
OKLab	oklab(64.36% -0.0738 -0.0542)
OKLCH	oklch(64.36% 0.092 216.3)
XYZ	xyz(21.7038, 27.6715, 45.7838)
Luminance	0.2767 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9BB1 #B1553F

analogous

#3FB18E #3F9BB1 #3F62B1

triadic

#3F9BB1 #B13F9B #9BB13F

tetradic

#3F9BB1 #8E3FB1 #B1553F #62B13F

square

#3F9BB1 #8E3FB1 #B1553F #62B13F

split-complementary

#3F9BB1 #B13F62 #B18E3F

monochromatic

#1F4C57 #2F7384 #3F9BB1 #65B5C8 #92CBD8

Accessibility & contrast

On white

3.21

#3F9BB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.53

#3F9BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9BB1

6.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9BB1	#FFFFFF	#000000	##000000
##3F9BB1	1.00	3.21	6.53	6.53
#FFFFFF	3.21	1.00	21.00	21.00
#000000	6.53	21.00	1.00	1.00
##000000	6.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8C96B2

Deuteranopia (green-blind)

#7C8AB1

Tritanopia (blue-blind)

#00A3A2

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #3f9bb1;
/* rgb */ color: rgb(63, 155, 177);
/* oklch */ color: oklch(64.4% 0.092 216.3);

Tailwind

colors: {
  custom: {
    50: '#81b8c8',
    500: '#3f9bb1',
    950: '#000000',
  },
}

SCSS

$custom: #3f9bb1;
$custom-light: #81b8c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9bb1",
  "rgb": {
    "r": 63,
    "g": 155,
    "b": 177
  },
  "hsl": {
    "h": 191.579,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.64364,
    "c": 0.09159,
    "h": 216.3
  },
  "luminance": 0.27674
}

Semantic roles & 50–950 ramp

primary

#3F9BB1

secondary

#C49488

accent

#6B51D7

background

#F8FBFC

surface

#F0F6F8

border

#CBD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3F9BB1

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

Preview Lab → · Contrast checker → · Palette generator →