#6399D3#6399D3

#6399D3 is a light, moderate cyan. Relative luminance 0.301; OKLCH L 66.9% C 0.104 H 251.2°. Best body text is #000000 at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#6399D3
RGB	rgb(99, 153, 211)
HSL	hsl(211, 56%, 61%)
HSV	hsv(211, 53%, 83%)
CMYK	cmyk(53.1%, 27.5%, 0%, 17.3%)
CIE-LAB	lab(61.77, -1.38, -35.12)
CIE-LCH	lch(61.77, 35.15, 267.75°)
OKLab	oklab(66.93% -0.0335 -0.0985)
OKLCH	oklch(66.93% 0.104 251.2)
XYZ	xyz(28.2906, 30.1360, 65.9414)
Luminance	0.3014 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399D3 #D39D63

analogous

#63D1D3 #6399D3 #6563D3

triadic

#6399D3 #D36399 #99D363

tetradic

#6399D3 #D363D1 #D39D63 #63D365

square

#6399D3 #D363D1 #D39D63 #63D365

split-complementary

#6399D3 #D36563 #D1D363

monochromatic

#295C92 #377AC2 #6399D3 #93B8E0 #C2D7EE

Accessibility & contrast

On white

2.99

#6399D3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.03

#6399D3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #6399D3

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399D3	#FFFFFF	#000000	##000000
##6399D3	1.00	2.99	7.03	7.03
#FFFFFF	2.99	1.00	21.00	21.00
#000000	7.03	21.00	1.00	1.00
##000000	7.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#819BD6

Deuteranopia (green-blind)

#7390D2

Tritanopia (blue-blind)

#22A6AD

Achromatopsia (no color)

#959595

Design tokens & code

CSS

--color: #6399d3;
/* rgb */ color: rgb(99, 153, 211);
/* oklch */ color: oklch(66.9% 0.104 251.2);

Tailwind

colors: {
  custom: {
    50: '#96b6e0',
    500: '#6399d3',
    950: '#000000',
  },
}

SCSS

$custom: #6399d3;
$custom-light: #96b6e0;
$custom-dark: #000000;

JSON

{
  "hex": "#6399d3",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 211
  },
  "hsl": {
    "h": 211.071,
    "s": 56,
    "l": 60.784
  },
  "oklch": {
    "l": 0.66931,
    "c": 0.10405,
    "h": 251.2
  },
  "luminance": 0.30138
}

Semantic roles & 50–950 ramp

primary

#6399D3

secondary

#DECAB4

accent

#7622C4

background

#F9FBFD

surface

#F2F6FB

border

#CCD0D4

text

#0E1115

muted

#7E8083

Preview Lab

Preview with #6399D3

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

Preview Lab → · Contrast checker → · Palette generator →