#3F9CB0#3F9CB0

#3F9CB0 is a light, moderate cyan. Relative luminance 0.280; OKLCH L 64.6% C 0.091 H 214.4°. Best body text is #000000 at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F9CB0
RGB	rgb(63, 156, 176)
HSL	hsl(191, 47%, 47%)
HSV	hsv(191, 64%, 69%)
CMYK	cmyk(64.2%, 11.4%, 0%, 31%)
CIE-LAB	lab(59.86, -21.05, -18.53)
CIE-LCH	lch(59.86, 28.04, 221.37°)
OKLab	oklab(64.57% -0.0753 -0.0515)
OKLCH	oklch(64.57% 0.091 214.4)
XYZ	xyz(21.7716, 27.9660, 45.3165)
Luminance	0.2797 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9CB0 #B0533F

analogous

#3FB08B #3F9CB0 #3F64B0

triadic

#3F9CB0 #B03F9C #9CB03F

tetradic

#3F9CB0 #8B3FB0 #B0533F #64B03F

square

#3F9CB0 #8B3FB0 #B0533F #64B03F

split-complementary

#3F9CB0 #B03F64 #B08B3F

monochromatic

#1F4C56 #2F7483 #3F9CB0 #65B6C8 #92CBD8

Accessibility & contrast

On white

3.18

#3F9CB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.59

#3F9CB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9CB0

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9CB0	#FFFFFF	#000000	##000000
##3F9CB0	1.00	3.18	6.59	6.59
#FFFFFF	3.18	1.00	21.00	21.00
#000000	6.59	21.00	1.00	1.00
##000000	6.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8E97B1

Deuteranopia (green-blind)

#7D8BB0

Tritanopia (blue-blind)

#00A4A2

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #3f9cb0;
/* rgb */ color: rgb(63, 156, 176);
/* oklch */ color: oklch(64.6% 0.091 214.4);

Tailwind

colors: {
  custom: {
    50: '#81b9c7',
    500: '#3f9cb0',
    950: '#000000',
  },
}

SCSS

$custom: #3f9cb0;
$custom-light: #81b9c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9cb0",
  "rgb": {
    "r": 63,
    "g": 156,
    "b": 176
  },
  "hsl": {
    "h": 190.619,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.64566,
    "c": 0.09121,
    "h": 214.4
  },
  "luminance": 0.27968
}

Semantic roles & 50–950 ramp

primary

#3F9CB0

secondary

#C39288

accent

#6951D7

background

#F8FBFC

surface

#F0F6F8

border

#CBD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3F9CB0

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

Preview Lab → · Contrast checker → · Palette generator →