#3999CC#3999CC

#3999CC is a light, moderate cyan. Relative luminance 0.280; OKLCH L 64.9% C 0.116 H 236.0°. Best body text is #000000 at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#3999CC
RGB	rgb(57, 153, 204)
HSL	hsl(201, 59%, 51%)
HSV	hsv(201, 72%, 80%)
CMYK	cmyk(72.1%, 25%, 0%, 20%)
CIE-LAB	lab(59.90, -11.23, -34.25)
CIE-LCH	lch(59.90, 36.04, 251.85°)
OKLab	oklab(64.92% -0.065 -0.0965)
OKLCH	oklch(64.92% 0.116 236)
XYZ	xyz(23.9734, 28.0092, 61.2579)
Luminance	0.2801 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3999CC #CC6C39

analogous

#39CCB5 #3999CC #394FCC

triadic

#3999CC #CC3999 #99CC39

tetradic

#3999CC #B539CC #CC6C39 #4FCC39

square

#3999CC #B539CC #CC6C39 #4FCC39

split-complementary

#3999CC #CC394F #CCB539

monochromatic

#1C526E #29769F #3999CC #6AB2D9 #9ACBE5

Accessibility & contrast

On white

3.18

#3999CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.60

#3999CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3999CC

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3999CC	#FFFFFF	#000000	##000000
##3999CC	1.00	3.18	6.60	6.60
#FFFFFF	3.18	1.00	21.00	21.00
#000000	6.60	21.00	1.00	1.00
##000000	6.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8198CE

Deuteranopia (green-blind)

#6D8ACB

Tritanopia (blue-blind)

#00A6AA

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #3999cc;
/* rgb */ color: rgb(57, 153, 204);
/* oklch */ color: oklch(64.9% 0.116 236.0);

Tailwind

colors: {
  custom: {
    50: '#82b7db',
    500: '#3999cc',
    950: '#000000',
  },
}

SCSS

$custom: #3999cc;
$custom-light: #82b7db;
$custom-dark: #000000;

JSON

{
  "hex": "#3999cc",
  "rgb": {
    "r": 57,
    "g": 153,
    "b": 204
  },
  "hsl": {
    "h": 200.816,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.64915,
    "c": 0.11634,
    "h": 236
  },
  "luminance": 0.28012
}

Semantic roles & 50–950 ramp

primary

#3999CC

secondary

#D1A690

accent

#7C46E2

background

#F8FBFD

surface

#F0F6FB

border

#CBD0D4

text

#0C1115

muted

#7D8083

Preview Lab

Preview with #3999CC

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

Preview Lab → · Contrast checker → · Palette generator →