#6378BB#6378BB

#6378BB is a mid, moderate blue. Relative luminance 0.197; OKLCH L 58.5% C 0.106 H 269.7°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#6378BB
RGB	rgb(99, 120, 187)
HSL	hsl(226, 39%, 56%)
HSV	hsv(226, 47%, 73%)
CMYK	cmyk(47.1%, 35.8%, 0%, 26.7%)
CIE-LAB	lab(51.46, 10.65, -37.68)
CIE-LCH	lch(51.46, 39.15, 285.79°)
OKLab	oklab(58.53% -0.0005 -0.1061)
OKLCH	oklch(58.53% 0.106 269.7)
XYZ	xyz(20.8289, 19.6722, 49.7037)
Luminance	0.1967 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6378BB #BBA663

analogous

#63A4BB #6378BB #7A63BB

triadic

#6378BB #BB6378 #78BB63

tetradic

#6378BB #BB63A4 #BBA663 #63BB7A

square

#6378BB #BB63A4 #BBA663 #63BB7A

split-complementary

#6378BB #BB7A63 #A4BB63

monochromatic

#324172 #44599D #6378BB #8E9DCE #B8C2E0

Accessibility & contrast

On white

4.26

#6378BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#6378BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6378BB

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6378BB	#FFFFFF	#000000	##000000
##6378BB	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F7FBE

Deuteranopia (green-blind)

#5777B9

Tritanopia (blue-blind)

#418691

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #6378bb;
/* rgb */ color: rgb(99, 120, 187);
/* oklch */ color: oklch(58.5% 0.106 269.7);

Tailwind

colors: {
  custom: {
    50: '#949ed0',
    500: '#6378bb',
    950: '#000000',
  },
}

SCSS

$custom: #6378bb;
$custom-light: #949ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#6378bb",
  "rgb": {
    "r": 99,
    "g": 120,
    "b": 187
  },
  "hsl": {
    "h": 225.682,
    "s": 39.286,
    "l": 56.078
  },
  "oklch": {
    "l": 0.58534,
    "c": 0.10608,
    "h": 269.7
  },
  "luminance": 0.19673
}

Semantic roles & 50–950 ramp

primary

#6378BB

secondary

#CFC6AB

accent

#B359CF

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0D0E14

muted

#7E7E82

Preview Lab

Preview with #6378BB

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

Preview Lab → · Contrast checker → · Palette generator →