#3F99D8#3F99D8

#3F99D8 is a light, vivid cyan. Relative luminance 0.288; OKLCH L 65.7% C 0.127 H 242.8°. Best body text is #000000 at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#3F99D8
RGB	rgb(63, 153, 216)
HSL	hsl(205, 66%, 55%)
HSV	hsv(205, 71%, 85%)
CMYK	cmyk(70.8%, 29.2%, 0%, 15.3%)
CIE-LAB	lab(60.60, -6.30, -39.84)
CIE-LCH	lch(60.60, 40.34, 261.01°)
OKLab	oklab(65.7% -0.0579 -0.1126)
OKLCH	oklch(65.7% 0.127 242.8)
XYZ	xyz(25.8310, 28.7942, 69.1489)
Luminance	0.2880 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F99D8 #D87E3F

analogous

#3FD8CB #3F99D8 #3F4CD8

triadic

#3F99D8 #D83F99 #99D83F

tetradic

#3F99D8 #CB3FD8 #D87E3F #4CD83F

square

#3F99D8 #CB3FD8 #D87E3F #4CD83F

split-complementary

#3F99D8 #D83F4C #D8CB3F

monochromatic

#1A5782 #257AB5 #3F99D8 #72B4E2 #A5CFED

Accessibility & contrast

On white

3.11

#3F99D8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.76

#3F99D8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F99D8

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F99D8	#FFFFFF	#000000	##000000
##3F99D8	1.00	3.11	6.76	6.76
#FFFFFF	3.11	1.00	21.00	21.00
#000000	6.76	21.00	1.00	1.00
##000000	6.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C9ADB

Deuteranopia (green-blind)

#678CD7

Tritanopia (blue-blind)

#00A8AF

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #3f99d8;
/* rgb */ color: rgb(63, 153, 216);
/* oklch */ color: oklch(65.7% 0.127 242.8);

Tailwind

colors: {
  custom: {
    50: '#86b6e4',
    500: '#3f99d8',
    950: '#000000',
  },
}

SCSS

$custom: #3f99d8;
$custom-light: #86b6e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f99d8",
  "rgb": {
    "r": 63,
    "g": 153,
    "b": 216
  },
  "hsl": {
    "h": 204.706,
    "s": 66.234,
    "l": 54.706
  },
  "oklch": {
    "l": 0.65696,
    "c": 0.12663,
    "h": 242.8
  },
  "luminance": 0.28797
}

Semantic roles & 50–950 ramp

primary

#3F99D8

secondary

#DAB499

accent

#853FE9

background

#F8FBFE

surface

#F0F6FC

border

#CBD0D5

text

#0D1115

muted

#7D8084

Preview Lab

Preview with #3F99D8

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

Preview Lab → · Contrast checker → · Palette generator →