#6399E4#6399E4

#6399E4 is a light, vivid cyan. Relative luminance 0.310; OKLCH L 67.8% C 0.126 H 256.8°. Best body text is #000000 at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#6399E4
RGB	rgb(99, 153, 228)
HSL	hsl(215, 70%, 64%)
HSV	hsv(215, 57%, 89%)
CMYK	cmyk(56.6%, 32.9%, 0%, 10.6%)
CIE-LAB	lab(62.54, 3.93, -43.37)
CIE-LCH	lch(62.54, 43.54, 275.17°)
OKLab	oklab(67.78% -0.0286 -0.1224)
OKLCH	oklch(67.78% 0.126 256.8)
XYZ	xyz(30.5355, 31.0340, 77.7648)
Luminance	0.3104 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6399E4 #E4AE63

analogous

#63D9E4 #6399E4 #6E63E4

triadic

#6399E4 #E46399 #99E463

tetradic

#6399E4 #E463D9 #E4AE63 #63E46E

square

#6399E4 #E463D9 #E4AE63 #63E46E

split-complementary

#6399E4 #E46E63 #D9E463

monochromatic

#1E5BAE #2F77DB #6399E4 #97BBED #CBDDF6

Accessibility & contrast

On white

2.91

#6399E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.21

#6399E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #6399E4

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6399E4	#FFFFFF	#000000	##000000
##6399E4	1.00	2.91	7.21	7.21
#FFFFFF	2.91	1.00	21.00	21.00
#000000	7.21	21.00	1.00	1.00
##000000	7.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A9EE7

Deuteranopia (green-blind)

#6A92E2

Tritanopia (blue-blind)

#00AAB4

Achromatopsia (no color)

#979797

Design tokens & code

CSS

--color: #6399e4;
/* rgb */ color: rgb(99, 153, 228);
/* oklch */ color: oklch(67.8% 0.126 256.8);

Tailwind

colors: {
  custom: {
    50: '#98b6ed',
    500: '#6399e4',
    950: '#000000',
  },
}

SCSS

$custom: #6399e4;
$custom-light: #98b6ed;
$custom-dark: #000000;

JSON

{
  "hex": "#6399e4",
  "rgb": {
    "r": 99,
    "g": 153,
    "b": 228
  },
  "hsl": {
    "h": 214.884,
    "s": 70.492,
    "l": 64.118
  },
  "oklch": {
    "l": 0.67782,
    "c": 0.12573,
    "h": 256.8
  },
  "luminance": 0.31037
}

Semantic roles & 50–950 ramp

primary

#6399E4

secondary

#E8D5BB

accent

#8213D3

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1116

muted

#7E8084

Preview Lab

Preview with #6399E4

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

Preview Lab → · Contrast checker → · Palette generator →