#6378CB#6378CB

#6378CB is a mid, vivid blue. Relative luminance 0.204; OKLCH L 59.4% C 0.129 H 271.3°. Best body text is #000000 at 5.08:1 contrast (WCAG AA passes).

Color values

HEX	#6378CB
RGB	rgb(99, 120, 203)
HSL	hsl(228, 50%, 59%)
HSV	hsv(228, 51%, 80%)
CMYK	cmyk(51.2%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(52.28, 15.62, -45.54)
CIE-LCH	lch(52.28, 48.14, 288.93°)
OKLab	oklab(59.43% 0.0029 -0.129)
OKLCH	oklch(59.43% 0.129 271.3)
XYZ	xyz(22.6381, 20.3959, 59.2322)
Luminance	0.2040 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6378CB #CBB663

analogous

#63ACCB #6378CB #8263CB

triadic

#6378CB #CB6378 #78CB63

tetradic

#6378CB #CB63AC #CBB663 #63CB82

square

#6378CB #CB63AC #CBB663 #63CB82

split-complementary

#6378CB #CB8263 #ACCB63

monochromatic

#2D3F87 #3C55B5 #6378CB #91A0DA #BFC7EA

Accessibility & contrast

On white

4.13

#6378CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.08

#6378CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6378CB

5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6378CB	#FFFFFF	#000000	##000000
##6378CB	1.00	4.13	5.08	5.08
#FFFFFF	4.13	1.00	21.00	21.00
#000000	5.08	21.00	1.00	1.00
##000000	5.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5781CE

Deuteranopia (green-blind)

#4C79C9

Tritanopia (blue-blind)

#358A98

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #6378cb;
/* rgb */ color: rgb(99, 120, 203);
/* oklch */ color: oklch(59.4% 0.129 271.3);

Tailwind

colors: {
  custom: {
    50: '#969edb',
    500: '#6378cb',
    950: '#000000',
  },
}

SCSS

$custom: #6378cb;
$custom-light: #969edb;
$custom-dark: #000000;

JSON

{
  "hex": "#6378cb",
  "rgb": {
    "r": 99,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 227.885,
    "s": 50,
    "l": 59.216
  },
  "oklch": {
    "l": 0.59431,
    "c": 0.12905,
    "h": 271.3
  },
  "luminance": 0.20397
}

Semantic roles & 50–950 ramp

primary

#6378CB

secondary

#D9D1B1

accent

#BD4EDA

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0E15

muted

#7E7E83

Preview Lab

Preview with #6378CB

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

Preview Lab → · Contrast checker → · Palette generator →