#6399BC#6399BC

#6399BC is a light, moderate cyan. Relative luminance 0.291; OKLCH L 65.9% C 0.078 H 238.0°. Best body text is #000000 at 6.81:1 contrast (WCAG AA passes).

Color values

HEX	#6399BC
RGB	rgb(99, 153, 188)
HSL	hsl(204, 40%, 56%)
HSV	hsv(204, 47%, 74%)
CMYK	cmyk(47.3%, 18.6%, 0%, 26.3%)
CIE-LAB	lab(60.84, -8.25, -23.68)
CIE-LCH	lch(60.84, 25.07, 250.79°)
OKLab	oklab(65.89% -0.0411 -0.0657)
OKLCH	oklch(65.89% 0.078 238)
XYZ	xyz(25.6107, 29.0641, 51.8276)
Luminance	0.2907 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399BC #BC8663

analogous

#63BCB3 #6399BC #636DBC

triadic

#6399BC #BC6399 #99BC63

tetradic

#6399BC #B363BC #BC8663 #6DBC63

square

#6399BC #B363BC #BC8663 #6DBC63

split-complementary

#6399BC #BC636D #BCB363

monochromatic

#315973 #447B9E #6399BC #8EB5CE #B9D1E1

Accessibility & contrast

On white

3.08

#6399BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.81

#6399BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6399BC

6.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399BC	#FFFFFF	#000000	##000000
##6399BC	1.00	3.08	6.81	6.81
#FFFFFF	3.08	1.00	21.00	21.00
#000000	6.81	21.00	1.00	1.00
##000000	6.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8998BE

Deuteranopia (green-blind)

#7D8FBB

Tritanopia (blue-blind)

#3AA2A4

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #6399bc;
/* rgb */ color: rgb(99, 153, 188);
/* oklch */ color: oklch(65.9% 0.078 238.0);

Tailwind

colors: {
  custom: {
    50: '#94b7d0',
    500: '#6399bc',
    950: '#000000',
  },
}

SCSS

$custom: #6399bc;
$custom-light: #94b7d0;
$custom-dark: #000000;

JSON

{
  "hex": "#6399bc",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 188
  },
  "hsl": {
    "h": 203.596,
    "s": 39.91,
    "l": 56.275
  },
  "oklch": {
    "l": 0.65887,
    "c": 0.07751,
    "h": 238
  },
  "luminance": 0.29066
}

Semantic roles & 50–950 ramp

primary

#6399BC

secondary

#D0B9AB

accent

#8758D0

background

#F9FBFC

surface

#F2F6F9

border

#CCD0D2

text

#0D1114

muted

#7E8082

Preview Lab

Preview with #6399BC

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

Preview Lab → · Contrast checker → · Palette generator →