#6399CB#6399CB

#6399CB is a light, moderate cyan. Relative luminance 0.297; OKLCH L 66.6% C 0.094 H 247.6°. Best body text is #000000 at 6.95:1 contrast (WCAG AA passes).

Color values

HEX	#6399CB
RGB	rgb(99, 153, 203)
HSL	hsl(209, 50%, 59%)
HSV	hsv(209, 51%, 80%)
CMYK	cmyk(51.2%, 24.6%, 0%, 20.4%)
CIE-LAB	lab(61.43, -3.82, -31.18)
CIE-LCH	lch(61.43, 31.41, 263.02°)
OKLab	oklab(66.55% -0.036 -0.0872)
OKLCH	oklch(66.55% 0.094 247.6)
XYZ	xyz(27.3125, 29.7448, 60.7904)
Luminance	0.2975 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399CB #CB9563

analogous

#63CBC9 #6399CB #6365CB

triadic

#6399CB #CB6399 #99CB63

tetradic

#6399CB #C963CB #CB9563 #65CB63

square

#6399CB #C963CB #CB9563 #65CB63

split-complementary

#6399CB #CB6365 #CBC963

monochromatic

#2D5C87 #3C7BB5 #6399CB #91B7DA #BFD5EA

Accessibility & contrast

On white

3.02

#6399CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.95

#6399CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6399CB

6.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399CB	#FFFFFF	#000000	##000000
##6399CB	1.00	3.02	6.95	6.95
#FFFFFF	3.02	1.00	21.00	21.00
#000000	6.95	21.00	1.00	1.00
##000000	6.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#849ACD

Deuteranopia (green-blind)

#7790CA

Tritanopia (blue-blind)

#2CA5AA

Achromatopsia (no color)

#949494

Design tokens & code

CSS

--color: #6399cb;
/* rgb */ color: rgb(99, 153, 203);
/* oklch */ color: oklch(66.6% 0.094 247.6);

Tailwind

colors: {
  custom: {
    50: '#95b6db',
    500: '#6399cb',
    950: '#000000',
  },
}

SCSS

$custom: #6399cb;
$custom-light: #95b6db;
$custom-dark: #000000;

JSON

{
  "hex": "#6399cb",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 203
  },
  "hsl": {
    "h": 208.846,
    "s": 50,
    "l": 59.216
  },
  "oklch": {
    "l": 0.66554,
    "c": 0.09429,
    "h": 247.6
  },
  "luminance": 0.29747
}

Semantic roles & 50–950 ramp

primary

#6399CB

secondary

#D9C4B1

accent

#914EDA

background

#F9FBFD

surface

#F2F6FB

border

#CCD0D4

text

#0E1115

muted

#7E8083

Preview Lab

Preview with #6399CB

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

Preview Lab → · Contrast checker → · Palette generator →