#6399EE#6399EE

#6399EE is a light, vivid blue. Relative luminance 0.316; OKLCH L 68.3% C 0.139 H 259.1°. Best body text is #000000 at 7.32:1 contrast (WCAG AA passes).

Color values

HEX	#6399EE
RGB	rgb(99, 153, 238)
HSL	hsl(217, 80%, 66%)
HSV	hsv(217, 58%, 93%)
CMYK	cmyk(58.4%, 35.7%, 0%, 6.7%)
CIE-LAB	lab(63.02, 7.12, -48.13)
CIE-LCH	lch(63.02, 48.65, 278.42°)
OKLab	oklab(68.31% -0.0261 -0.1363)
OKLCH	oklch(68.31% 0.139 259.1)
XYZ	xyz(31.9640, 31.6054, 85.2884)
Luminance	0.3161 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399EE #EEB863

analogous

#63DEEE #6399EE #7263EE

triadic

#6399EE #EE6399 #99EE63

tetradic

#6399EE #EE63DE #EEB863 #63EE72

square

#6399EE #EE63DE #EEB863 #63EE72

split-complementary

#6399EE #EE7263 #DEEE63

monochromatic

#1558C2 #2C75E8 #6399EE #9ABDF4 #D1E1FA

Accessibility & contrast

On white

2.87

#6399EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.32

#6399EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #6399EE

7.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399EE	#FFFFFF	#000000	##000000
##6399EE	1.00	2.87	7.32	7.32
#FFFFFF	2.87	1.00	21.00	21.00
#000000	7.32	21.00	1.00	1.00
##000000	7.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#75A0F1

Deuteranopia (green-blind)

#6393EC

Tritanopia (blue-blind)

#00ACB8

Achromatopsia (no color)

#989898

Design tokens & code

CSS

--color: #6399ee;
/* rgb */ color: rgb(99, 153, 238);
/* oklch */ color: oklch(68.3% 0.139 259.1);

Tailwind

colors: {
  custom: {
    50: '#9ab6f4',
    500: '#6399ee',
    950: '#000000',
  },
}

SCSS

$custom: #6399ee;
$custom-light: #9ab6f4;
$custom-dark: #000000;

JSON

{
  "hex": "#6399ee",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 238
  },
  "hsl": {
    "h": 216.691,
    "s": 80.347,
    "l": 66.078
  },
  "oklch": {
    "l": 0.68312,
    "c": 0.1388,
    "h": 259.1
  },
  "luminance": 0.31608
}

Semantic roles & 50–950 ramp

primary

#6399EE

secondary

#EDDBC0

accent

#8A09DD

background

#FAFBFE

surface

#F3F6FD

border

#CDD0D5

text

#0F1117

muted

#7F8085

Preview Lab

Preview with #6399EE

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

Preview Lab → · Contrast checker → · Palette generator →