#3F9DB3#3F9DB3

#3F9DB3 is a light, moderate cyan. Relative luminance 0.284; OKLCH L 64.9% C 0.093 H 216.0°. Best body text is #000000 at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F9DB3
RGB	rgb(63, 157, 179)
HSL	hsl(191, 48%, 47%)
HSV	hsv(191, 65%, 70%)
CMYK	cmyk(64.8%, 12.3%, 0%, 29.8%)
CIE-LAB	lab(60.27, -20.64, -19.60)
CIE-LCH	lch(60.27, 28.46, 223.53°)
OKLab	oklab(64.93% -0.0751 -0.0545)
OKLCH	oklch(64.93% 0.093 216)
XYZ	xyz(22.2402, 28.4230, 46.9532)
Luminance	0.2843 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9DB3 #B3553F

analogous

#3FB38F #3F9DB3 #3F63B3

triadic

#3F9DB3 #B33F9D #9DB33F

tetradic

#3F9DB3 #8F3FB3 #B3553F #63B33F

square

#3F9DB3 #8F3FB3 #B3553F #63B33F

split-complementary

#3F9DB3 #B33F63 #B38F3F

monochromatic

#1F4E58 #2F7586 #3F9DB3 #66B6C9 #93CCD9

Accessibility & contrast

On white

3.14

#3F9DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.69

#3F9DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9DB3

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9DB3	#FFFFFF	#000000	##000000
##3F9DB3	1.00	3.14	6.69	6.69
#FFFFFF	3.14	1.00	21.00	21.00
#000000	6.69	21.00	1.00	1.00
##000000	6.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8E98B4

Deuteranopia (green-blind)

#7D8CB3

Tritanopia (blue-blind)

#00A5A4

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #3f9db3;
/* rgb */ color: rgb(63, 157, 179);
/* oklch */ color: oklch(64.9% 0.093 216.0);

Tailwind

colors: {
  custom: {
    50: '#81bac9',
    500: '#3f9db3',
    950: '#000000',
  },
}

SCSS

$custom: #3f9db3;
$custom-light: #81bac9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9db3",
  "rgb": {
    "r": 63,
    "g": 157,
    "b": 179
  },
  "hsl": {
    "h": 191.379,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.64932,
    "c": 0.09282,
    "h": 216
  },
  "luminance": 0.28425
}

Semantic roles & 50–950 ramp

primary

#3F9DB3

secondary

#C49589

accent

#6A50D8

background

#F8FBFC

surface

#F0F6F8

border

#CBD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3F9DB3

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

Preview Lab → · Contrast checker → · Palette generator →