#6388DD#6388DD

#6388DD is a light, vivid blue. Relative luminance 0.255; OKLCH L 63.8% C 0.135 H 265.0°. Best body text is #000000 at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#6388DD
RGB	rgb(99, 136, 221)
HSL	hsl(222, 64%, 63%)
HSV	hsv(222, 55%, 87%)
CMYK	cmyk(55.2%, 38.5%, 0%, 13.3%)
CIE-LAB	lab(57.54, 11.69, -47.36)
CIE-LCH	lch(57.54, 48.78, 283.86°)
OKLab	oklab(63.79% -0.0116 -0.1342)
OKLCH	oklch(63.79% 0.135 265)
XYZ	xyz(26.9965, 25.4794, 71.8880)
Luminance	0.2548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6388DD #DDB863

analogous

#63C5DD #6388DD #7B63DD

triadic

#6388DD #DD6388 #88DD63

tetradic

#6388DD #DD63C5 #DDB863 #63DD7B

square

#6388DD #DD63C5 #DDB863 #63DD7B

split-complementary

#6388DD #DD7B63 #C5DD63

monochromatic

#234AA2 #3162D2 #6388DD #95AEE8 #C7D5F3

Accessibility & contrast

On white

3.44

#6388DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.10

#6388DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6388DD

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6388DD	#FFFFFF	#000000	##000000
##6388DD	1.00	3.44	6.10	6.10
#FFFFFF	3.44	1.00	21.00	21.00
#000000	6.10	21.00	1.00	1.00
##000000	6.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6590E0

Deuteranopia (green-blind)

#5685DB

Tritanopia (blue-blind)

#179BA8

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #6388dd;
/* rgb */ color: rgb(99, 136, 221);
/* oklch */ color: oklch(63.8% 0.135 265.0);

Tailwind

colors: {
  custom: {
    50: '#98aae8',
    500: '#6388dd',
    950: '#000000',
  },
}

SCSS

$custom: #6388dd;
$custom-light: #98aae8;
$custom-dark: #000000;

JSON

{
  "hex": "#6388dd",
  "rgb": {
    "r": 99,
    "g": 136,
    "b": 221
  },
  "hsl": {
    "h": 221.803,
    "s": 64.211,
    "l": 62.745
  },
  "oklch": {
    "l": 0.63787,
    "c": 0.13472,
    "h": 265
  },
  "luminance": 0.25481
}

Semantic roles & 50–950 ramp

primary

#6388DD

secondary

#E4D7B8

accent

#9619CC

background

#F9FAFE

surface

#F2F4FC

border

#CCCED5

text

#0E1016

muted

#7E7F84

Preview Lab

Preview with #6388DD

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

Preview Lab → · Contrast checker → · Palette generator →