#6399EC#6399EC

#6399EC is a light, vivid blue. Relative luminance 0.315; OKLCH L 68.2% C 0.136 H 258.7°. Best body text is #000000 at 7.30:1 contrast (WCAG AA passes).

Color values

HEX	#6399EC
RGB	rgb(99, 153, 236)
HSL	hsl(216, 78%, 66%)
HSV	hsv(216, 58%, 93%)
CMYK	cmyk(58.1%, 35.2%, 0%, 7.5%)
CIE-LAB	lab(62.92, 6.48, -47.18)
CIE-LCH	lch(62.92, 47.62, 277.82°)
OKLab	oklab(68.2% -0.0266 -0.1335)
OKLCH	oklch(68.2% 0.136 258.7)
XYZ	xyz(31.6718, 31.4885, 83.7495)
Luminance	0.3149 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399EC #ECB663

analogous

#63DEEC #6399EC #7163EC

triadic

#6399EC #EC6399 #99EC63

tetradic

#6399EC #EC63DE #ECB663 #63EC71

square

#6399EC #EC63DE #ECB663 #63EC71

split-complementary

#6399EC #EC7163 #DEEC63

monochromatic

#1759BE #2C75E5 #6399EC #9ABDF3 #D0E0F9

Accessibility & contrast

On white

2.88

#6399EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.30

#6399EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #6399EC

7.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399EC	#FFFFFF	#000000	##000000
##6399EC	1.00	2.88	7.30	7.30
#FFFFFF	2.88	1.00	21.00	21.00
#000000	7.30	21.00	1.00	1.00
##000000	7.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#769FEF

Deuteranopia (green-blind)

#6492EA

Tritanopia (blue-blind)

#00ACB7

Achromatopsia (no color)

#989898

Design tokens & code

CSS

--color: #6399ec;
/* rgb */ color: rgb(99, 153, 236);
/* oklch */ color: oklch(68.2% 0.136 258.7);

Tailwind

colors: {
  custom: {
    50: '#99b6f2',
    500: '#6399ec',
    950: '#000000',
  },
}

SCSS

$custom: #6399ec;
$custom-light: #99b6f2;
$custom-dark: #000000;

JSON

{
  "hex": "#6399ec",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 236
  },
  "hsl": {
    "h": 216.35,
    "s": 78.286,
    "l": 65.686
  },
  "oklch": {
    "l": 0.68204,
    "c": 0.13617,
    "h": 258.7
  },
  "luminance": 0.31491
}

Semantic roles & 50–950 ramp

primary

#6399EC

secondary

#ECDABF

accent

#890BDB

background

#FAFBFE

surface

#F3F6FD

border

#CDD0D5

text

#0F1117

muted

#7F8085

Preview Lab

Preview with #6399EC

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

Preview Lab → · Contrast checker → · Palette generator →