#646DDD#646DDD

#646DDD is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.5% C 0.168 H 276.4°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#646DDD
RGB	rgb(100, 109, 221)
HSL	hsl(236, 64%, 63%)
HSV	hsv(236, 55%, 87%)
CMYK	cmyk(54.8%, 50.7%, 0%, 13.3%)
CIE-LAB	lab(50.53, 28.26, -58.55)
CIE-LCH	lch(50.53, 65.01, 295.76°)
OKLab	oklab(58.45% 0.0188 -0.1673)
OKLCH	oklch(58.45% 0.168 276.4)
XYZ	xyz(23.7711, 18.8655, 70.7814)
Luminance	0.1887 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DDD #DDD464

analogous

#64A9DD #646DDD #9764DD

triadic

#646DDD #DD646D #6DDD64

tetradic

#646DDD #DD64A9 #DDD464 #64DD97

square

#646DDD #DD64A9 #DDD464 #64DD97

split-complementary

#646DDD #DD9764 #A9DD64

monochromatic

#242DA3 #323ED2 #646DDD #969CE8 #C8CCF3

Accessibility & contrast

On white

4.40

#646DDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#646DDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646DDD

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DDD	#FFFFFF	#000000	##000000
##646DDD	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#327DE1

Deuteranopia (green-blind)

#1F73DB

Tritanopia (blue-blind)

#26869B

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #646ddd;
/* rgb */ color: rgb(100, 109, 221);
/* oklch */ color: oklch(58.5% 0.168 276.4);

Tailwind

colors: {
  custom: {
    50: '#9996e8',
    500: '#646ddd',
    950: '#000000',
  },
}

SCSS

$custom: #646ddd;
$custom-light: #9996e8;
$custom-dark: #000000;

JSON

{
  "hex": "#646ddd",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 221
  },
  "hsl": {
    "h": 235.537,
    "s": 64.021,
    "l": 62.941
  },
  "oklch": {
    "l": 0.58452,
    "c": 0.16833,
    "h": 276.4
  },
  "luminance": 0.18867
}

Semantic roles & 50–950 ramp

primary

#646DDD

secondary

#E4E1B9

accent

#BF1ACC

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646DDD

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

Preview Lab → · Contrast checker → · Palette generator →