#3F9BB5#3F9BB5

#3F9BB5 is a light, moderate cyan. Relative luminance 0.278; OKLCH L 64.5% C 0.094 H 219.7°. Best body text is #000000 at 6.57:1 contrast (WCAG AA passes).

Color values

HEX	#3F9BB5
RGB	rgb(63, 155, 181)
HSL	hsl(193, 48%, 48%)
HSV	hsv(193, 65%, 71%)
CMYK	cmyk(65.2%, 14.4%, 0%, 29%)
CIE-LAB	lab(59.74, -18.96, -21.54)
CIE-LCH	lch(59.74, 28.70, 228.65°)
OKLab	oklab(64.53% -0.0722 -0.06)
OKLCH	oklch(64.53% 0.094 219.7)
XYZ	xyz(22.1083, 27.8333, 47.9143)
Luminance	0.2784 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F9BB5 #B5593F

analogous

#3FB594 #3F9BB5 #3F60B5

triadic

#3F9BB5 #B53F9B #9BB53F

tetradic

#3F9BB5 #943FB5 #B5593F #60B53F

square

#3F9BB5 #943FB5 #B5593F #60B53F

split-complementary

#3F9BB5 #B53F60 #B5943F

monochromatic

#1F4D5A #2F7488 #3F9BB5 #67B4CA #94CBDA

Accessibility & contrast

On white

3.20

#3F9BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.57

#3F9BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F9BB5

6.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F9BB5	#FFFFFF	#000000	##000000
##3F9BB5	1.00	3.20	6.57	6.57
#FFFFFF	3.20	1.00	21.00	21.00
#000000	6.57	21.00	1.00	1.00
##000000	6.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8B97B6

Deuteranopia (green-blind)

#7A8BB5

Tritanopia (blue-blind)

#00A4A3

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #3f9bb5;
/* rgb */ color: rgb(63, 155, 181);
/* oklch */ color: oklch(64.5% 0.094 219.7);

Tailwind

colors: {
  custom: {
    50: '#81b8cb',
    500: '#3f9bb5',
    950: '#000000',
  },
}

SCSS

$custom: #3f9bb5;
$custom-light: #81b8cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f9bb5",
  "rgb": {
    "r": 63,
    "g": 155,
    "b": 181
  },
  "hsl": {
    "h": 193.22,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.6453,
    "c": 0.09388,
    "h": 219.7
  },
  "luminance": 0.27836
}

Semantic roles & 50–950 ramp

primary

#3F9BB5

secondary

#C5978A

accent

#6E50D8

background

#F8FBFC

surface

#F0F6F8

border

#CBD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #3F9BB5

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

Preview Lab → · Contrast checker → · Palette generator →