#647DDD#647DDD

#647DDD is a mid, vivid blue. Relative luminance 0.226; OKLCH L 61.6% C 0.148 H 270.6°. Best body text is #000000 at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#647DDD
RGB	rgb(100, 125, 221)
HSL	hsl(228, 64%, 63%)
HSV	hsv(228, 55%, 87%)
CMYK	cmyk(54.8%, 43.4%, 0%, 13.3%)
CIE-LAB	lab(54.65, 18.51, -51.94)
CIE-LCH	lch(54.65, 55.15, 289.62°)
OKLab	oklab(61.58% 0.0015 -0.1477)
OKLCH	oklch(61.58% 0.148 270.6)
XYZ	xyz(25.6360, 22.5952, 71.4030)
Luminance	0.2260 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647DDD #DDC464

analogous

#64BADD #647DDD #8764DD

triadic

#647DDD #DD647D #7DDD64

tetradic

#647DDD #DD64BA #DDC464 #64DD87

square

#647DDD #DD64BA #DDC464 #64DD87

split-complementary

#647DDD #DD8764 #BADD64

monochromatic

#243EA3 #3253D2 #647DDD #96A7E8 #C8D1F3

Accessibility & contrast

On white

3.80

#647DDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.52

#647DDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647DDD

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647DDD	#FFFFFF	#000000	##000000
##647DDD	1.00	3.80	5.52	5.52
#FFFFFF	3.80	1.00	21.00	21.00
#000000	5.52	21.00	1.00	1.00
##000000	5.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5388E1

Deuteranopia (green-blind)

#447EDB

Tritanopia (blue-blind)

#2192A2

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #647ddd;
/* rgb */ color: rgb(100, 125, 221);
/* oklch */ color: oklch(61.6% 0.148 270.6);

Tailwind

colors: {
  custom: {
    50: '#98a2e8',
    500: '#647ddd',
    950: '#000000',
  },
}

SCSS

$custom: #647ddd;
$custom-light: #98a2e8;
$custom-dark: #000000;

JSON

{
  "hex": "#647ddd",
  "rgb": {
    "r": 100,
    "g": 125,
    "b": 221
  },
  "hsl": {
    "h": 227.603,
    "s": 64.021,
    "l": 62.941
  },
  "oklch": {
    "l": 0.61582,
    "c": 0.14774,
    "h": 270.6
  },
  "luminance": 0.22597
}

Semantic roles & 50–950 ramp

primary

#647DDD

secondary

#E4DBB9

accent

#A71ACC

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0F16

muted

#7E7E84

Preview Lab

Preview with #647DDD

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

Preview Lab → · Contrast checker → · Palette generator →