#6399EF#6399EF

#6399EF is a light, vivid blue. Relative luminance 0.317; OKLCH L 68.4% C 0.140 H 259.3°. Best body text is #000000 at 7.33:1 contrast (WCAG AA passes).

Color values

HEX	#6399EF
RGB	rgb(99, 153, 239)
HSL	hsl(217, 81%, 66%)
HSV	hsv(217, 59%, 94%)
CMYK	cmyk(58.6%, 36%, 0%, 6.3%)
CIE-LAB	lab(63.06, 7.44, -48.60)
CIE-LCH	lch(63.06, 49.17, 278.71°)
OKLab	oklab(68.37% -0.0259 -0.1377)
OKLCH	oklch(68.37% 0.14 259.3)
XYZ	xyz(32.1114, 31.6643, 86.0642)
Luminance	0.3167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399EF #EFB963

analogous

#63DFEF #6399EF #7363EF

triadic

#6399EF #EF6399 #99EF63

tetradic

#6399EF #EF63DF #EFB963 #63EF73

square

#6399EF #EF63DF #EFB963 #63EF73

split-complementary

#6399EF #EF7363 #DFEF63

monochromatic

#1458C4 #2B75E9 #6399EF #9BBDF5 #D2E2FA

Accessibility & contrast

On white

2.86

#6399EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.33

#6399EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #6399EF

7.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399EF	#FFFFFF	#000000	##000000
##6399EF	1.00	2.86	7.33	7.33
#FFFFFF	2.86	1.00	21.00	21.00
#000000	7.33	21.00	1.00	1.00
##000000	7.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#75A0F3

Deuteranopia (green-blind)

#6293ED

Tritanopia (blue-blind)

#00ACB9

Achromatopsia (no color)

#999999

Design tokens & code

CSS

--color: #6399ef;
/* rgb */ color: rgb(99, 153, 239);
/* oklch */ color: oklch(68.4% 0.140 259.3);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#6399ef",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 239
  },
  "hsl": {
    "h": 216.857,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.68366,
    "c": 0.14011,
    "h": 259.3
  },
  "luminance": 0.31667
}

Semantic roles & 50–950 ramp

primary

#6399EF

secondary

#EEDCC0

accent

#8B08DE

background

#FAFBFE

surface

#F3F6FD

border

#CDD0D5

text

#0F1117

muted

#7F8085

Preview Lab

Preview with #6399EF

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

Preview Lab → · Contrast checker → · Palette generator →