#3F9DB2#3F9DB2

#3F9DB2 is a light, moderate cyan. Relative luminance 0.284; OKLCH L 64.9% C 0.092 H 215.1°. Best body text is #000000 at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F9DB2
RGB	rgb(63, 157, 178)
HSL	hsl(191, 48%, 47%)
HSV	hsv(191, 65%, 70%)
CMYK	cmyk(64.6%, 11.8%, 0%, 30.2%)
CIE-LAB	lab(60.23, -20.95, -19.09)
CIE-LCH	lch(60.23, 28.34, 222.35°)
OKLab	oklab(64.89% -0.0755 -0.0531)
OKLCH	oklch(64.89% 0.092 215.1)
XYZ	xyz(22.1394, 28.3827, 46.4225)
Luminance	0.2838 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9DB2 #B2543F

analogous

#3FB28E #3F9DB2 #3F63B2

triadic

#3F9DB2 #B23F9D #9DB23F

tetradic

#3F9DB2 #8E3FB2 #B2543F #63B23F

square

#3F9DB2 #8E3FB2 #B2543F #63B23F

split-complementary

#3F9DB2 #B23F63 #B28E3F

monochromatic

#1F4D58 #2F7585 #3F9DB2 #66B7C9 #93CCD9

Accessibility & contrast

On white

3.15

#3F9DB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.68

#3F9DB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9DB2

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9DB2	#FFFFFF	#000000	##000000
##3F9DB2	1.00	3.15	6.68	6.68
#FFFFFF	3.15	1.00	21.00	21.00
#000000	6.68	21.00	1.00	1.00
##000000	6.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8E98B3

Deuteranopia (green-blind)

#7E8CB2

Tritanopia (blue-blind)

#00A5A3

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #3f9db2;
/* rgb */ color: rgb(63, 157, 178);
/* oklch */ color: oklch(64.9% 0.092 215.1);

Tailwind

colors: {
  custom: {
    50: '#81bac9',
    500: '#3f9db2',
    950: '#000000',
  },
}

SCSS

$custom: #3f9db2;
$custom-light: #81bac9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9db2",
  "rgb": {
    "r": 63,
    "g": 157,
    "b": 178
  },
  "hsl": {
    "h": 190.957,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.64891,
    "c": 0.09231,
    "h": 215.1
  },
  "luminance": 0.28385
}

Semantic roles & 50–950 ramp

primary

#3F9DB2

secondary

#C49489

accent

#6950D7

background

#F8FBFC

surface

#F0F6F8

border

#CBD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3F9DB2

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

Preview Lab → · Contrast checker → · Palette generator →