#6399F4#6399F4

#6399F4 is a light, vivid blue. Relative luminance 0.320; OKLCH L 68.6% C 0.147 H 260.3°. Best body text is #000000 at 7.39:1 contrast (WCAG AA passes).

Color values

HEX	#6399F4
RGB	rgb(99, 153, 244)
HSL	hsl(218, 87%, 67%)
HSV	hsv(218, 59%, 96%)
CMYK	cmyk(59.4%, 37.3%, 0%, 4.3%)
CIE-LAB	lab(63.31, 9.06, -50.96)
CIE-LCH	lch(63.31, 51.76, 280.08°)
OKLab	oklab(68.64% -0.0248 -0.1446)
OKLCH	oklch(68.64% 0.147 260.3)
XYZ	xyz(32.8602, 31.9639, 90.0084)
Luminance	0.3197 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399F4 #F4BE63

analogous

#63E2F4 #6399F4 #7663F4

triadic

#6399F4 #F46399 #99F463

tetradic

#6399F4 #F463E2 #F4BE63 #63F476

square

#6399F4 #F463E2 #F4BE63 #63F476

split-complementary

#6399F4 #F47663 #E2F463

monochromatic

#0F56CE #2A74F0 #6399F4 #9CBEF8 #D5E4FC

Accessibility & contrast

On white

2.84

#6399F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.39

#6399F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #6399F4

7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399F4	#FFFFFF	#000000	##000000
##6399F4	1.00	2.84	7.39	7.39
#FFFFFF	2.84	1.00	21.00	21.00
#000000	7.39	21.00	1.00	1.00
##000000	7.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#72A1F8

Deuteranopia (green-blind)

#5F93F2

Tritanopia (blue-blind)

#00ADBB

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #6399f4;
/* rgb */ color: rgb(99, 153, 244);
/* oklch */ color: oklch(68.6% 0.147 260.3);

Tailwind

colors: {
  custom: {
    50: '#9ab6f8',
    500: '#6399f4',
    950: '#000000',
  },
}

SCSS

$custom: #6399f4;
$custom-light: #9ab6f8;
$custom-dark: #000000;

JSON

{
  "hex": "#6399f4",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 244
  },
  "hsl": {
    "h": 217.655,
    "s": 86.826,
    "l": 67.255
  },
  "oklch": {
    "l": 0.6864,
    "c": 0.14668,
    "h": 260.3
  },
  "luminance": 0.31967
}

Semantic roles & 50–950 ramp

primary

#6399F4

secondary

#F0DFC3

accent

#8F02E3

background

#FAFBFF

surface

#F3F6FF

border

#CDD0D7

text

#0F1117

muted

#7F8085

Preview Lab

Preview with #6399F4

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

Preview Lab → · Contrast checker → · Palette generator →