#646BB2#646BB2

#646BB2 is a mid, moderate blue. Relative luminance 0.164; OKLCH L 55.4% C 0.110 H 277.9°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#646BB2
RGB	rgb(100, 107, 178)
HSL	hsl(235, 34%, 55%)
HSV	hsv(235, 44%, 70%)
CMYK	cmyk(43.8%, 39.9%, 0%, 30.2%)
CIE-LAB	lab(47.54, 16.11, -38.65)
CIE-LCH	lch(47.54, 41.87, 292.63°)
OKLab	oklab(55.39% 0.0151 -0.1089)
OKLCH	oklch(55.39% 0.11 277.9)
XYZ	xyz(18.5467, 16.4382, 44.3065)
Luminance	0.1644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB2 #B2AB64

analogous

#6492B2 #646BB2 #8464B2

triadic

#646BB2 #B2646B #6BB264

tetradic

#646BB2 #B26492 #B2AB64 #64B284

square

#646BB2 #B26492 #B2AB64 #64B284

split-complementary

#646BB2 #B28464 #92B264

monochromatic

#343868 #484E91 #646BB2 #8D92C6 #B6B9DB

Accessibility & contrast

On white

4.90

#646BB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#646BB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB2

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB2	#FFFFFF	#000000	##FFFFFF
##646BB2	1.00	4.90	4.29	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5174B5

Deuteranopia (green-blind)

#4C6EB0

Tritanopia (blue-blind)

#4A7986

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646bb2;
/* rgb */ color: rgb(100, 107, 178);
/* oklch */ color: oklch(55.4% 0.110 277.9);

Tailwind

colors: {
  custom: {
    50: '#9495c9',
    500: '#646bb2',
    950: '#000000',
  },
}

SCSS

$custom: #646bb2;
$custom-light: #9495c9;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb2",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 178
  },
  "hsl": {
    "h": 234.615,
    "s": 33.621,
    "l": 54.51
  },
  "oklch": {
    "l": 0.55387,
    "c": 0.10999,
    "h": 277.9
  },
  "luminance": 0.16439
}

Semantic roles & 50–950 ramp

primary

#646BB2

secondary

#C9C6A8

accent

#C05ECA

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646BB2

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

Preview Lab → · Contrast checker → · Palette generator →