#6399CC#6399CC

#6399CC is a light, moderate cyan. Relative luminance 0.298; OKLCH L 66.6% C 0.095 H 248.1°. Best body text is #000000 at 6.96:1 contrast (WCAG AA passes).

Color values

HEX	#6399CC
RGB	rgb(99, 153, 204)
HSL	hsl(209, 51%, 59%)
HSV	hsv(209, 51%, 80%)
CMYK	cmyk(51.5%, 25%, 0%, 20%)
CIE-LAB	lab(61.47, -3.52, -31.67)
CIE-LCH	lch(61.47, 31.87, 263.67°)
OKLab	oklab(66.6% -0.0356 -0.0886)
OKLCH	oklch(66.6% 0.095 248.1)
XYZ	xyz(27.4321, 29.7926, 61.4200)
Luminance	0.2979 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399CC #CC9663

analogous

#63CCCB #6399CC #6365CC

triadic

#6399CC #CC6399 #99CC63

tetradic

#6399CC #CB63CC #CC9663 #65CC63

square

#6399CC #CB63CC #CC9663 #65CC63

split-complementary

#6399CC #CC6365 #CCCB63

monochromatic

#2C5C88 #3C7BB6 #6399CC #91B7DB #BFD5EA

Accessibility & contrast

On white

3.02

#6399CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.96

#6399CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6399CC

6.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399CC	#FFFFFF	#000000	##000000
##6399CC	1.00	3.02	6.96	6.96
#FFFFFF	3.02	1.00	21.00	21.00
#000000	6.96	21.00	1.00	1.00
##000000	6.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#849ACE

Deuteranopia (green-blind)

#7690CB

Tritanopia (blue-blind)

#2BA5AA

Achromatopsia (no color)

#949494

Design tokens & code

CSS

--color: #6399cc;
/* rgb */ color: rgb(99, 153, 204);
/* oklch */ color: oklch(66.6% 0.095 248.1);

Tailwind

colors: {
  custom: {
    50: '#96b6db',
    500: '#6399cc',
    950: '#000000',
  },
}

SCSS

$custom: #6399cc;
$custom-light: #96b6db;
$custom-dark: #000000;

JSON

{
  "hex": "#6399cc",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 204
  },
  "hsl": {
    "h": 209.143,
    "s": 50.725,
    "l": 59.412
  },
  "oklch": {
    "l": 0.666,
    "c": 0.09549,
    "h": 248.1
  },
  "luminance": 0.29795
}

Semantic roles & 50–950 ramp

primary

#6399CC

secondary

#DAC5B1

accent

#924EDA

background

#F9FBFD

surface

#F2F6FB

border

#CCD0D4

text

#0E1115

muted

#7E8083

Preview Lab

Preview with #6399CC

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

Preview Lab → · Contrast checker → · Palette generator →