#3999C7#3999C7

#3999C7 is a light, moderate cyan. Relative luminance 0.278; OKLCH L 64.7% C 0.112 H 233.2°. Best body text is #000000 at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#3999C7
RGB	rgb(57, 153, 199)
HSL	hsl(199, 56%, 50%)
HSV	hsv(199, 71%, 78%)
CMYK	cmyk(71.4%, 23.1%, 0%, 22%)
CIE-LAB	lab(59.68, -12.92, -31.78)
CIE-LCH	lch(59.68, 34.30, 247.87°)
OKLab	oklab(64.68% -0.0667 -0.0893)
OKLCH	oklch(64.68% 0.112 233.2)
XYZ	xyz(23.3833, 27.7732, 58.1502)
Luminance	0.2778 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3999C7 #C76739

analogous

#39C7AE #3999C7 #3952C7

triadic

#3999C7 #C73999 #99C739

tetradic

#3999C7 #AE39C7 #C76739 #52C739

square

#3999C7 #AE39C7 #C76739 #52C739

split-complementary

#3999C7 #C73952 #C7AE39

monochromatic

#1D5068 #2B7598 #3999C7 #69B2D4 #98CAE2

Accessibility & contrast

On white

3.20

#3999C7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.56

#3999C7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3999C7

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3999C7	#FFFFFF	#000000	##000000
##3999C7	1.00	3.20	6.56	6.56
#FFFFFF	3.20	1.00	21.00	21.00
#000000	6.56	21.00	1.00	1.00
##000000	6.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8298C9

Deuteranopia (green-blind)

#6F8AC6

Tritanopia (blue-blind)

#00A5A8

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #3999c7;
/* rgb */ color: rgb(57, 153, 199);
/* oklch */ color: oklch(64.7% 0.112 233.2);

Tailwind

colors: {
  custom: {
    50: '#81b7d8',
    500: '#3999c7',
    950: '#000000',
  },
}

SCSS

$custom: #3999c7;
$custom-light: #81b7d8;
$custom-dark: #000000;

JSON

{
  "hex": "#3999c7",
  "rgb": {
    "r": 57,
    "g": 153,
    "b": 199
  },
  "hsl": {
    "h": 199.437,
    "s": 55.906,
    "l": 50.196
  },
  "oklch": {
    "l": 0.64675,
    "c": 0.11151,
    "h": 233.2
  },
  "luminance": 0.27776
}

Semantic roles & 50–950 ramp

primary

#3999C7

secondary

#CEA38E

accent

#7949DF

background

#F8FBFD

surface

#F0F6FA

border

#CBD0D3

text

#0C1114

muted

#7D8083

Preview Lab

Preview with #3999C7

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

Preview Lab → · Contrast checker → · Palette generator →