#6388EB#6388EB

#6388EB is a light, vivid blue. Relative luminance 0.263; OKLCH L 64.6% C 0.154 H 266.7°. Best body text is #000000 at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#6388EB
RGB	rgb(99, 136, 235)
HSL	hsl(224, 77%, 65%)
HSV	hsv(224, 58%, 92%)
CMYK	cmyk(57.9%, 42.1%, 0%, 7.8%)
CIE-LAB	lab(58.28, 16.20, -53.99)
CIE-LCH	lch(58.28, 56.36, 286.71°)
OKLab	oklab(64.6% -0.0089 -0.1536)
OKLCH	oklch(64.6% 0.154 266.7)
XYZ	xyz(28.9401, 26.2568, 82.1242)
Luminance	0.2626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6388EB #EBC663

analogous

#63CCEB #6388EB #8263EB

triadic

#6388EB #EB6388 #88EB63

tetradic

#6388EB #EB63CC #EBC663 #63EB82

square

#6388EB #EB63CC #EBC663 #63EB82

split-complementary

#6388EB #EB8263 #CCEB63

monochromatic

#1845BC #2D5FE4 #6388EB #99B1F2 #CFDBF9

Accessibility & contrast

On white

3.36

#6388EB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.25

#6388EB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6388EB

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6388EB	#FFFFFF	#000000	##000000
##6388EB	1.00	3.36	6.25	6.25
#FFFFFF	3.36	1.00	21.00	21.00
#000000	6.25	21.00	1.00	1.00
##000000	6.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C93EF

Deuteranopia (green-blind)

#4A86E9

Tritanopia (blue-blind)

#009EAE

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #6388eb;
/* rgb */ color: rgb(99, 136, 235);
/* oklch */ color: oklch(64.6% 0.154 266.7);

Tailwind

colors: {
  custom: {
    50: '#99aaf2',
    500: '#6388eb',
    950: '#000000',
  },
}

SCSS

$custom: #6388eb;
$custom-light: #99aaf2;
$custom-dark: #000000;

JSON

{
  "hex": "#6388eb",
  "rgb": {
    "r": 99,
    "g": 136,
    "b": 235
  },
  "hsl": {
    "h": 223.676,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.64599,
    "c": 0.15388,
    "h": 266.7
  },
  "luminance": 0.26259
}

Semantic roles & 50–950 ramp

primary

#6388EB

secondary

#ECDFBE

accent

#A20CDA

background

#FAFAFE

surface

#F3F4FD

border

#CDCED5

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #6388EB

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

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