#3F83BB#3F83BB

#3F83BB is a mid, moderate cyan. Relative luminance 0.209; OKLCH L 59.1% C 0.110 H 246.0°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#3F83BB
RGB	rgb(63, 131, 187)
HSL	hsl(207, 50%, 49%)
HSV	hsv(207, 66%, 73%)
CMYK	cmyk(66.3%, 29.9%, 0%, 26.7%)
CIE-LAB	lab(52.81, -3.58, -35.68)
CIE-LCH	lch(52.81, 35.86, 264.28°)
OKLab	oklab(59.11% -0.0448 -0.1008)
OKLCH	oklch(59.11% 0.11 246)
XYZ	xyz(19.1325, 20.8753, 50.0251)
Luminance	0.2088 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F83BB #BB773F

analogous

#3FBBB5 #3F83BB #3F45BB

triadic

#3F83BB #BB3F83 #83BB3F

tetradic

#3F83BB #B53FBB #BB773F #45BB3F

square

#3F83BB #B53FBB #BB773F #45BB3F

split-complementary

#3F83BB #BB3F45 #BBB53F

monochromatic

#20435F #30638D #3F83BB #6AA0CD #98BEDC

Accessibility & contrast

On white

4.06

#3F83BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#3F83BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F83BB

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F83BB	#FFFFFF	#000000	##000000
##3F83BB	1.00	4.06	5.18	5.18
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A85BD

Deuteranopia (green-blind)

#5979BA

Tritanopia (blue-blind)

#009097

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3f83bb;
/* rgb */ color: rgb(63, 131, 187);
/* oklch */ color: oklch(59.1% 0.110 246.0);

Tailwind

colors: {
  custom: {
    50: '#81a6cf',
    500: '#3f83bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f83bb;
$custom-light: #81a6cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f83bb",
  "rgb": {
    "r": 63,
    "g": 131,
    "b": 187
  },
  "hsl": {
    "h": 207.097,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.59105,
    "c": 0.11028,
    "h": 246
  },
  "luminance": 0.20877
}

Semantic roles & 50–950 ramp

primary

#3F83BB

secondary

#C8A88E

accent

#8D4FD9

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3F83BB

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

Preview Lab → · Contrast checker → · Palette generator →