#6399F3#6399F3

#6399F3 is a light, vivid blue. Relative luminance 0.319; OKLCH L 68.6% C 0.145 H 260.1°. Best body text is #000000 at 7.38:1 contrast (WCAG AA passes).

Color values

HEX	#6399F3
RGB	rgb(99, 153, 243)
HSL	hsl(218, 86%, 67%)
HSV	hsv(218, 59%, 95%)
CMYK	cmyk(59.3%, 37%, 0%, 4.7%)
CIE-LAB	lab(63.26, 8.73, -50.49)
CIE-LCH	lch(63.26, 51.24, 279.82°)
OKLab	oklab(68.58% -0.025 -0.1432)
OKLCH	oklch(68.58% 0.145 260.1)
XYZ	xyz(32.7088, 31.9033, 89.2109)
Luminance	0.3191 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399F3 #F3BD63

analogous

#63E1F3 #6399F3 #7563F3

triadic

#6399F3 #F36399 #99F363

tetradic

#6399F3 #F363E1 #F3BD63 #63F375

square

#6399F3 #F363E1 #F3BD63 #63F375

split-complementary

#6399F3 #F37563 #E1F363

monochromatic

#1056CC #2A74EF #6399F3 #9CBEF7 #D5E3FC

Accessibility & contrast

On white

2.85

#6399F3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.38

#6399F3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #6399F3

7.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399F3	#FFFFFF	#000000	##000000
##6399F3	1.00	2.85	7.38	7.38
#FFFFFF	2.85	1.00	21.00	21.00
#000000	7.38	21.00	1.00	1.00
##000000	7.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#73A0F7

Deuteranopia (green-blind)

#5F93F1

Tritanopia (blue-blind)

#00ADBA

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #6399f3;
/* rgb */ color: rgb(99, 153, 243);
/* oklch */ color: oklch(68.6% 0.145 260.1);

Tailwind

colors: {
  custom: {
    50: '#9ab6f7',
    500: '#6399f3',
    950: '#000000',
  },
}

SCSS

$custom: #6399f3;
$custom-light: #9ab6f7;
$custom-dark: #000000;

JSON

{
  "hex": "#6399f3",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 243
  },
  "hsl": {
    "h": 217.5,
    "s": 85.714,
    "l": 67.059
  },
  "oklch": {
    "l": 0.68585,
    "c": 0.14536,
    "h": 260.1
  },
  "luminance": 0.31906
}

Semantic roles & 50–950 ramp

primary

#6399F3

secondary

#F0DFC2

accent

#8F03E2

background

#FAFBFF

surface

#F3F6FF

border

#CDD0D7

text

#0F1117

muted

#7F8085

Preview Lab

Preview with #6399F3

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

Preview Lab → · Contrast checker → · Palette generator →