#3F8FB1#3F8FB1

#3F8FB1 is a mid, moderate cyan. Relative luminance 0.239; OKLCH L 61.5% C 0.093 H 229.0°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#3F8FB1
RGB	rgb(63, 143, 177)
HSL	hsl(198, 48%, 47%)
HSV	hsv(198, 64%, 69%)
CMYK	cmyk(64.4%, 19.2%, 0%, 30.6%)
CIE-LAB	lab(55.96, -13.75, -25.07)
CIE-LCH	lch(55.96, 28.59, 241.25°)
OKLab	oklab(61.46% -0.0609 -0.0701)
OKLCH	oklch(61.46% 0.093 229)
XYZ	xyz(19.8050, 23.8740, 45.1508)
Luminance	0.2388 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F8FB1 #B1613F

analogous

#3FB19A #3F8FB1 #3F56B1

triadic

#3F8FB1 #B13F8F #8FB13F

tetradic

#3F8FB1 #9A3FB1 #B1613F #56B13F

square

#3F8FB1 #9A3FB1 #B1613F #56B13F

split-complementary

#3F8FB1 #B13F56 #B19A3F

monochromatic

#1F4657 #2F6B84 #3F8FB1 #65ABC8 #92C3D8

Accessibility & contrast

On white

3.64

#3F8FB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#3F8FB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F8FB1

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F8FB1	#FFFFFF	#000000	##000000
##3F8FB1	1.00	3.64	5.78	5.78
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D8DB3

Deuteranopia (green-blind)

#6E81B1

Tritanopia (blue-blind)

#00999A

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #3f8fb1;
/* rgb */ color: rgb(63, 143, 177);
/* oklch */ color: oklch(61.5% 0.093 229.0);

Tailwind

colors: {
  custom: {
    50: '#80afc8',
    500: '#3f8fb1',
    950: '#000000',
  },
}

SCSS

$custom: #3f8fb1;
$custom-light: #80afc8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f8fb1",
  "rgb": {
    "r": 63,
    "g": 143,
    "b": 177
  },
  "hsl": {
    "h": 197.895,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.61459,
    "c": 0.09286,
    "h": 229
  },
  "luminance": 0.23876
}

Semantic roles & 50–950 ramp

primary

#3F8FB1

secondary

#C49A88

accent

#7951D7

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3F8FB1

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

Preview Lab → · Contrast checker → · Palette generator →