#3F99DA#3F99DA

#3F99DA is a light, vivid cyan. Relative luminance 0.289; OKLCH L 65.8% C 0.129 H 243.6°. Best body text is #000000 at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#3F99DA
RGB	rgb(63, 153, 218)
HSL	hsl(205, 68%, 55%)
HSV	hsv(205, 71%, 85%)
CMYK	cmyk(71.1%, 29.8%, 0%, 14.5%)
CIE-LAB	lab(60.69, -5.61, -40.81)
CIE-LCH	lch(60.69, 41.20, 262.17°)
OKLab	oklab(65.8% -0.0573 -0.1154)
OKLCH	oklch(65.8% 0.129 243.6)
XYZ	xyz(26.0912, 28.8983, 70.5189)
Luminance	0.2890 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F99DA #DA803F

analogous

#3FDACD #3F99DA #3F4CDA

triadic

#3F99DA #DA3F99 #99DA3F

tetradic

#3F99DA #CD3FDA #DA803F #4CDA3F

square

#3F99DA #CD3FDA #DA803F #4CDA3F

split-complementary

#3F99DA #DA3F4C #DACD3F

monochromatic

#1A5885 #247AB8 #3F99DA #72B4E4 #A6D0EE

Accessibility & contrast

On white

3.10

#3F99DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.78

#3F99DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F99DA

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F99DA	#FFFFFF	#000000	##000000
##3F99DA	1.00	3.10	6.78	6.78
#FFFFFF	3.10	1.00	21.00	21.00
#000000	6.78	21.00	1.00	1.00
##000000	6.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B9BDD

Deuteranopia (green-blind)

#668CD9

Tritanopia (blue-blind)

#00A9B0

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #3f99da;
/* rgb */ color: rgb(63, 153, 218);
/* oklch */ color: oklch(65.8% 0.129 243.6);

Tailwind

colors: {
  custom: {
    50: '#86b6e5',
    500: '#3f99da',
    950: '#000000',
  },
}

SCSS

$custom: #3f99da;
$custom-light: #86b6e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f99da",
  "rgb": {
    "r": 63,
    "g": 153,
    "b": 218
  },
  "hsl": {
    "h": 205.161,
    "s": 67.686,
    "l": 55.098
  },
  "oklch": {
    "l": 0.65799,
    "c": 0.12887,
    "h": 243.6
  },
  "luminance": 0.28901
}

Semantic roles & 50–950 ramp

primary

#3F99DA

secondary

#DBB59A

accent

#863DEB

background

#F8FBFE

surface

#F0F6FC

border

#CBD0D5

text

#0D1116

muted

#7D8084

Preview Lab

Preview with #3F99DA

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

Preview Lab → · Contrast checker → · Palette generator →