#3F99DC#3F99DC

#3F99DC is a light, vivid cyan. Relative luminance 0.290; OKLCH L 65.9% C 0.131 H 244.4°. Best body text is #000000 at 6.80:1 contrast (WCAG AA passes).

Color values

HEX	#3F99DC
RGB	rgb(63, 153, 220)
HSL	hsl(206, 69%, 55%)
HSV	hsv(206, 71%, 86%)
CMYK	cmyk(71.4%, 30.5%, 0%, 13.7%)
CIE-LAB	lab(60.78, -4.93, -41.78)
CIE-LCH	lch(60.78, 42.07, 263.28°)
OKLab	oklab(65.9% -0.0567 -0.1183)
OKLCH	oklch(65.9% 0.131 244.4)
XYZ	xyz(26.3544, 29.0036, 71.9056)
Luminance	0.2901 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F99DC #DC823F

analogous

#3FDCD0 #3F99DC #3F4ADC

triadic

#3F99DC #DC3F99 #99DC3F

tetradic

#3F99DC #D03FDC #DC823F #4ADC3F

square

#3F99DC #D03FDC #DC823F #4ADC3F

split-complementary

#3F99DC #DC3F4A #DCD03F

monochromatic

#195888 #227ABC #3F99DC #73B4E5 #A7D0EF

Accessibility & contrast

On white

3.09

#3F99DC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.80

#3F99DC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F99DC

6.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F99DC	#FFFFFF	#000000	##000000
##3F99DC	1.00	3.09	6.80	6.80
#FFFFFF	3.09	1.00	21.00	21.00
#000000	6.80	21.00	1.00	1.00
##000000	6.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A9BDF

Deuteranopia (green-blind)

#658CDB

Tritanopia (blue-blind)

#00A9B1

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #3f99dc;
/* rgb */ color: rgb(63, 153, 220);
/* oklch */ color: oklch(65.9% 0.131 244.4);

Tailwind

colors: {
  custom: {
    50: '#87b6e7',
    500: '#3f99dc',
    950: '#000000',
  },
}

SCSS

$custom: #3f99dc;
$custom-light: #87b6e7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f99dc",
  "rgb": {
    "r": 63,
    "g": 153,
    "b": 220
  },
  "hsl": {
    "h": 205.605,
    "s": 69.163,
    "l": 55.49
  },
  "oklch": {
    "l": 0.65903,
    "c": 0.13114,
    "h": 244.4
  },
  "luminance": 0.29007
}

Semantic roles & 50–950 ramp

primary

#3F99DC

secondary

#DCB79B

accent

#873CEC

background

#F9FBFE

surface

#F1F6FC

border

#CBD0D5

text

#0D1116

muted

#7E8084

Preview Lab

Preview with #3F99DC

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

Preview Lab → · Contrast checker → · Palette generator →