#646CB7#646CB7

#646CB7 is a mid, moderate blue. Relative luminance 0.169; OKLCH L 55.9% C 0.116 H 277.3°. Best body text is #FFFFFF at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#646CB7
RGB	rgb(100, 108, 183)
HSL	hsl(234, 37%, 55%)
HSV	hsv(234, 45%, 72%)
CMYK	cmyk(45.4%, 41%, 0%, 28.2%)
CIE-LAB	lab(48.07, 17.01, -40.71)
CIE-LCH	lch(48.07, 44.12, 292.67°)
OKLab	oklab(55.88% 0.0148 -0.115)
OKLCH	oklch(55.88% 0.116 277.3)
XYZ	xyz(19.1627, 16.8524, 47.0337)
Luminance	0.1685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CB7 #B7AF64

analogous

#6495B7 #646CB7 #8564B7

triadic

#646CB7 #B7646C #6CB764

tetradic

#646CB7 #B76495 #B7AF64 #64B785

square

#646CB7 #B76495 #B7AF64 #64B785

split-complementary

#646CB7 #B78564 #95B764

monochromatic

#33396E #464E97 #646CB7 #8E94CA #B8BBDE

Accessibility & contrast

On white

4.80

#646CB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#646CB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646CB7

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CB7	#FFFFFF	#000000	##FFFFFF
##646CB7	1.00	4.80	4.37	4.80
#FFFFFF	4.80	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5075BA

Deuteranopia (green-blind)

#4A6FB5

Tritanopia (blue-blind)

#477B89

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646cb7;
/* rgb */ color: rgb(100, 108, 183);
/* oklch */ color: oklch(55.9% 0.116 277.3);

Tailwind

colors: {
  custom: {
    50: '#9496cd',
    500: '#646cb7',
    950: '#000000',
  },
}

SCSS

$custom: #646cb7;
$custom-light: #9496cd;
$custom-dark: #000000;

JSON

{
  "hex": "#646cb7",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 183
  },
  "hsl": {
    "h": 234.217,
    "s": 36.564,
    "l": 55.49
  },
  "oklch": {
    "l": 0.55878,
    "c": 0.11593,
    "h": 277.3
  },
  "luminance": 0.16853
}

Semantic roles & 50–950 ramp

primary

#646CB7

secondary

#CDC9AA

accent

#C25BCD

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646CB7

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

Preview Lab → · Contrast checker → · Palette generator →