#647CDD#647CDD

#647CDD is a mid, vivid blue. Relative luminance 0.223; OKLCH L 61.4% C 0.149 H 271.0°. Best body text is #000000 at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#647CDD
RGB	rgb(100, 124, 221)
HSL	hsl(228, 64%, 63%)
HSV	hsv(228, 55%, 87%)
CMYK	cmyk(54.8%, 43.9%, 0%, 13.3%)
CIE-LAB	lab(54.39, 19.12, -52.36)
CIE-LCH	lch(54.39, 55.75, 290.06°)
OKLab	oklab(61.38% 0.0026 -0.149)
OKLCH	oklch(61.38% 0.149 271)
XYZ	xyz(25.5100, 22.3432, 71.3610)
Luminance	0.2235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647CDD #DDC564

analogous

#64B8DD #647CDD #8864DD

triadic

#647CDD #DD647C #7CDD64

tetradic

#647CDD #DD64B8 #DDC564 #64DD88

square

#647CDD #DD64B8 #DDC564 #64DD88

split-complementary

#647CDD #DD8864 #B8DD64

monochromatic

#243DA3 #3252D2 #647CDD #96A6E8 #C8D1F3

Accessibility & contrast

On white

3.84

#647CDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.47

#647CDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647CDD

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647CDD	#FFFFFF	#000000	##000000
##647CDD	1.00	3.84	5.47	5.47
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.47	21.00	1.00	1.00
##000000	5.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5288E1

Deuteranopia (green-blind)

#437DDB

Tritanopia (blue-blind)

#2191A2

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #647cdd;
/* rgb */ color: rgb(100, 124, 221);
/* oklch */ color: oklch(61.4% 0.149 271.0);

Tailwind

colors: {
  custom: {
    50: '#98a1e8',
    500: '#647cdd',
    950: '#000000',
  },
}

SCSS

$custom: #647cdd;
$custom-light: #98a1e8;
$custom-dark: #000000;

JSON

{
  "hex": "#647cdd",
  "rgb": {
    "r": 100,
    "g": 124,
    "b": 221
  },
  "hsl": {
    "h": 228.099,
    "s": 64.021,
    "l": 62.941
  },
  "oklch": {
    "l": 0.61381,
    "c": 0.14899,
    "h": 271
  },
  "luminance": 0.22345
}

Semantic roles & 50–950 ramp

primary

#647CDD

secondary

#E4DCB9

accent

#A81ACC

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #647CDD

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

Preview Lab → · Contrast checker → · Palette generator →