#6399BB#6399BB

#6399BB is a light, moderate cyan. Relative luminance 0.290; OKLCH L 65.8% C 0.076 H 237.2°. Best body text is #000000 at 6.80:1 contrast (WCAG AA passes).

Color values

HEX	#6399BB
RGB	rgb(99, 153, 187)
HSL	hsl(203, 39%, 56%)
HSV	hsv(203, 47%, 73%)
CMYK	cmyk(47.1%, 18.2%, 0%, 26.7%)
CIE-LAB	lab(60.80, -8.54, -23.17)
CIE-LCH	lch(60.80, 24.70, 249.77°)
OKLab	oklab(65.85% -0.0414 -0.0643)
OKLCH	oklch(65.85% 0.077 237.2)
XYZ	xyz(25.5033, 29.0211, 51.2618)
Luminance	0.2902 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399BB #BB8563

analogous

#63BBB1 #6399BB #636DBB

triadic

#6399BB #BB6399 #99BB63

tetradic

#6399BB #B163BB #BB8563 #6DBB63

square

#6399BB #B163BB #BB8563 #6DBB63

split-complementary

#6399BB #BB636D #BBB163

monochromatic

#325972 #447A9D #6399BB #8EB5CE #B8D1E0

Accessibility & contrast

On white

3.09

#6399BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.80

#6399BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6399BB

6.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399BB	#FFFFFF	#000000	##000000
##6399BB	1.00	3.09	6.80	6.80
#FFFFFF	3.09	1.00	21.00	21.00
#000000	6.80	21.00	1.00	1.00
##000000	6.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8A98BD

Deuteranopia (green-blind)

#7D8FBA

Tritanopia (blue-blind)

#3BA2A4

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #6399bb;
/* rgb */ color: rgb(99, 153, 187);
/* oklch */ color: oklch(65.8% 0.076 237.2);

Tailwind

colors: {
  custom: {
    50: '#94b7cf',
    500: '#6399bb',
    950: '#000000',
  },
}

SCSS

$custom: #6399bb;
$custom-light: #94b7cf;
$custom-dark: #000000;

JSON

{
  "hex": "#6399bb",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 187
  },
  "hsl": {
    "h": 203.182,
    "s": 39.286,
    "l": 56.078
  },
  "oklch": {
    "l": 0.65845,
    "c": 0.0765,
    "h": 237.2
  },
  "luminance": 0.29023
}

Semantic roles & 50–950 ramp

primary

#6399BB

secondary

#CFB9AB

accent

#8659CF

background

#F9FBFC

surface

#F2F6F9

border

#CCD0D2

text

#0D1113

muted

#7E8082

Preview Lab

Preview with #6399BB

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

Preview Lab → · Contrast checker → · Palette generator →