#646DB7#646DB7

#646DB7 is a mid, moderate blue. Relative luminance 0.171; OKLCH L 56.1% C 0.115 H 276.8°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#646DB7
RGB	rgb(100, 109, 183)
HSL	hsl(233, 37%, 55%)
HSV	hsv(233, 45%, 72%)
CMYK	cmyk(45.4%, 40.4%, 0%, 28.2%)
CIE-LAB	lab(48.34, 16.39, -40.29)
CIE-LCH	lch(48.34, 43.50, 292.14°)
OKLab	oklab(56.08% 0.0135 -0.1137)
OKLCH	oklch(56.08% 0.115 276.8)
XYZ	xyz(19.2688, 17.0645, 47.0690)
Luminance	0.1707 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DB7 #B7AE64

analogous

#6496B7 #646DB7 #8464B7

triadic

#646DB7 #B7646D #6DB764

tetradic

#646DB7 #B76496 #B7AE64 #64B784

square

#646DB7 #B76496 #B7AE64 #64B784

split-complementary

#646DB7 #B78464 #96B764

monochromatic

#33396E #464F97 #646DB7 #8E94CA #B8BCDE

Accessibility & contrast

On white

4.76

#646DB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#646DB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646DB7

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DB7	#FFFFFF	#000000	##FFFFFF
##646DB7	1.00	4.76	4.41	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5276BA

Deuteranopia (green-blind)

#4B70B5

Tritanopia (blue-blind)

#477C89

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646db7;
/* rgb */ color: rgb(100, 109, 183);
/* oklch */ color: oklch(56.1% 0.115 276.8);

Tailwind

colors: {
  custom: {
    50: '#9496cd',
    500: '#646db7',
    950: '#000000',
  },
}

SCSS

$custom: #646db7;
$custom-light: #9496cd;
$custom-dark: #000000;

JSON

{
  "hex": "#646db7",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 183
  },
  "hsl": {
    "h": 233.494,
    "s": 36.564,
    "l": 55.49
  },
  "oklch": {
    "l": 0.56083,
    "c": 0.11454,
    "h": 276.8
  },
  "luminance": 0.17066
}

Semantic roles & 50–950 ramp

primary

#646DB7

secondary

#CDC9AA

accent

#C05BCD

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646DB7

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

Preview Lab → · Contrast checker → · Palette generator →