#3F9BB0#3F9BB0

#3F9BB0 is a light, moderate cyan. Relative luminance 0.276; OKLCH L 64.3% C 0.091 H 215.4°. Best body text is #000000 at 6.53:1 contrast (WCAG AA passes).

Color values

HEX	#3F9BB0
RGB	rgb(63, 155, 176)
HSL	hsl(191, 47%, 47%)
HSV	hsv(191, 64%, 69%)
CMYK	cmyk(64.2%, 11.9%, 0%, 31%)
CIE-LAB	lab(59.55, -20.52, -19.00)
CIE-LCH	lch(59.55, 27.96, 222.79°)
OKLab	oklab(64.32% -0.0742 -0.0528)
OKLCH	oklch(64.32% 0.091 215.4)
XYZ	xyz(21.6045, 27.6318, 45.2608)
Luminance	0.2763 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9BB0 #B0543F

analogous

#3FB08C #3F9BB0 #3F63B0

triadic

#3F9BB0 #B03F9B #9BB03F

tetradic

#3F9BB0 #8C3FB0 #B0543F #63B03F

square

#3F9BB0 #8C3FB0 #B0543F #63B03F

split-complementary

#3F9BB0 #B03F63 #B08C3F

monochromatic

#1F4C56 #2F7383 #3F9BB0 #65B5C8 #92CBD8

Accessibility & contrast

On white

3.22

#3F9BB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.53

#3F9BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9BB0

6.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9BB0	#FFFFFF	#000000	##000000
##3F9BB0	1.00	3.22	6.53	6.53
#FFFFFF	3.22	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)

#8C96B1

Deuteranopia (green-blind)

#7C8AB0

Tritanopia (blue-blind)

#00A3A1

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #3f9bb0;
/* rgb */ color: rgb(63, 155, 176);
/* oklch */ color: oklch(64.3% 0.091 215.4);

Tailwind

colors: {
  custom: {
    50: '#81b8c7',
    500: '#3f9bb0',
    950: '#000000',
  },
}

SCSS

$custom: #3f9bb0;
$custom-light: #81b8c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9bb0",
  "rgb": {
    "r": 63,
    "g": 155,
    "b": 176
  },
  "hsl": {
    "h": 191.15,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.64322,
    "c": 0.09108,
    "h": 215.4
  },
  "luminance": 0.27634
}

Semantic roles & 50–950 ramp

primary

#3F9BB0

secondary

#C39388

accent

#6A51D7

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3F9BB0

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

Preview Lab → · Contrast checker → · Palette generator →