#6399F0#6399F0

#6399F0 is a light, vivid blue. Relative luminance 0.317; OKLCH L 68.4% C 0.141 H 259.5°. Best body text is #000000 at 7.35:1 contrast (WCAG AA passes).

Color values

HEX	#6399F0
RGB	rgb(99, 153, 240)
HSL	hsl(217, 82%, 66%)
HSV	hsv(217, 59%, 94%)
CMYK	cmyk(58.8%, 36.3%, 0%, 5.9%)
CIE-LAB	lab(63.11, 7.77, -49.07)
CIE-LCH	lch(63.11, 49.68, 278.99°)
OKLab	oklab(68.42% -0.0257 -0.1391)
OKLCH	oklch(68.42% 0.141 259.5)
XYZ	xyz(32.2595, 31.7236, 86.8444)
Luminance	0.3173 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399F0 #F0BA63

analogous

#63E0F0 #6399F0 #7463F0

triadic

#6399F0 #F06399 #99F063

tetradic

#6399F0 #F063E0 #F0BA63 #63F074

square

#6399F0 #F063E0 #F0BA63 #63F074

split-complementary

#6399F0 #F07463 #E0F063

monochromatic

#1357C6 #2B74EB #6399F0 #9BBEF5 #D3E2FB

Accessibility & contrast

On white

2.86

#6399F0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.35

#6399F0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #6399F0

7.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399F0	#FFFFFF	#000000	##000000
##6399F0	1.00	2.86	7.35	7.35
#FFFFFF	2.86	1.00	21.00	21.00
#000000	7.35	21.00	1.00	1.00
##000000	7.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#74A0F4

Deuteranopia (green-blind)

#6293EE

Tritanopia (blue-blind)

#00ADB9

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #6399f0;
/* rgb */ color: rgb(99, 153, 240);
/* oklch */ color: oklch(68.4% 0.141 259.5);

Tailwind

colors: {
  custom: {
    50: '#9ab6f5',
    500: '#6399f0',
    950: '#000000',
  },
}

SCSS

$custom: #6399f0;
$custom-light: #9ab6f5;
$custom-dark: #000000;

JSON

{
  "hex": "#6399f0",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 240
  },
  "hsl": {
    "h": 217.021,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.6842,
    "c": 0.14142,
    "h": 259.5
  },
  "luminance": 0.31726
}

Semantic roles & 50–950 ramp

primary

#6399F0

secondary

#EEDDC1

accent

#8C07DF

background

#FAFBFF

surface

#F3F6FE

border

#CDD0D6

text

#0F1117

muted

#7F8085

Preview Lab

Preview with #6399F0

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

Preview Lab → · Contrast checker → · Palette generator →