#3F99D7#3F99D7

#3F99D7 is a light, vivid cyan. Relative luminance 0.287; OKLCH L 65.6% C 0.126 H 242.4°. Best body text is #000000 at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F99D7
RGB	rgb(63, 153, 215)
HSL	hsl(204, 66%, 55%)
HSV	hsv(204, 71%, 84%)
CMYK	cmyk(70.7%, 28.8%, 0%, 15.7%)
CIE-LAB	lab(60.55, -6.64, -39.36)
CIE-LCH	lch(60.55, 39.91, 260.42°)
OKLab	oklab(65.65% -0.0582 -0.1112)
OKLCH	oklch(65.65% 0.126 242.4)
XYZ	xyz(25.7021, 28.7427, 68.4701)
Luminance	0.2875 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F99D7 #D77D3F

analogous

#3FD7C9 #3F99D7 #3F4DD7

triadic

#3F99D7 #D73F99 #99D73F

tetradic

#3F99D7 #C93FD7 #D77D3F #4DD73F

square

#3F99D7 #C93FD7 #D77D3F #4DD73F

split-complementary

#3F99D7 #D73F4D #D7C93F

monochromatic

#1B5781 #2579B3 #3F99D7 #72B4E2 #A4CFEC

Accessibility & contrast

On white

3.11

#3F99D7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.75

#3F99D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F99D7

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F99D7	#FFFFFF	#000000	##000000
##3F99D7	1.00	3.11	6.75	6.75
#FFFFFF	3.11	1.00	21.00	21.00
#000000	6.75	21.00	1.00	1.00
##000000	6.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D9ADA

Deuteranopia (green-blind)

#688CD6

Tritanopia (blue-blind)

#00A8AF

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #3f99d7;
/* rgb */ color: rgb(63, 153, 215);
/* oklch */ color: oklch(65.6% 0.126 242.4);

Tailwind

colors: {
  custom: {
    50: '#86b6e3',
    500: '#3f99d7',
    950: '#000000',
  },
}

SCSS

$custom: #3f99d7;
$custom-light: #86b6e3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f99d7",
  "rgb": {
    "r": 63,
    "g": 153,
    "b": 215
  },
  "hsl": {
    "h": 204.474,
    "s": 65.517,
    "l": 54.51
  },
  "oklch": {
    "l": 0.65645,
    "c": 0.12552,
    "h": 242.4
  },
  "luminance": 0.28746
}

Semantic roles & 50–950 ramp

primary

#3F99D7

secondary

#D9B399

accent

#843FE8

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0C1115

muted

#7D8083

Preview Lab

Preview with #3F99D7

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

Preview Lab → · Contrast checker → · Palette generator →