#646BB3#646BB3

#646BB3 is a mid, moderate blue. Relative luminance 0.165; OKLCH L 55.4% C 0.111 H 277.9°. Best body text is #FFFFFF at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#646BB3
RGB	rgb(100, 107, 179)
HSL	hsl(235, 34%, 55%)
HSV	hsv(235, 44%, 70%)
CMYK	cmyk(44.1%, 40.2%, 0%, 29.8%)
CIE-LAB	lab(47.60, 16.41, -39.15)
CIE-LCH	lch(47.60, 42.45, 292.75°)
OKLab	oklab(55.44% 0.0153 -0.1104)
OKLCH	oklch(55.44% 0.111 277.9)
XYZ	xyz(18.6475, 16.4785, 44.8372)
Luminance	0.1648 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB3 #B3AC64

analogous

#6492B3 #646BB3 #8564B3

triadic

#646BB3 #B3646B #6BB364

tetradic

#646BB3 #B36492 #B3AC64 #64B385

square

#646BB3 #B36492 #B3AC64 #64B385

split-complementary

#646BB3 #B38564 #92B364

monochromatic

#343869 #484E92 #646BB3 #8D92C7 #B6B9DB

Accessibility & contrast

On white

4.89

#646BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#646BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB3

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB3	#FFFFFF	#000000	##FFFFFF
##646BB3	1.00	4.89	4.30	4.89
#FFFFFF	4.89	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5174B6

Deuteranopia (green-blind)

#4B6EB1

Tritanopia (blue-blind)

#4A7A86

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646bb3;
/* rgb */ color: rgb(100, 107, 179);
/* oklch */ color: oklch(55.4% 0.111 277.9);

Tailwind

colors: {
  custom: {
    50: '#9495ca',
    500: '#646bb3',
    950: '#000000',
  },
}

SCSS

$custom: #646bb3;
$custom-light: #9495ca;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb3",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 179
  },
  "hsl": {
    "h": 234.684,
    "s": 34.199,
    "l": 54.706
  },
  "oklch": {
    "l": 0.55444,
    "c": 0.11147,
    "h": 277.9
  },
  "luminance": 0.16479
}

Semantic roles & 50–950 ramp

primary

#646BB3

secondary

#CAC7A9

accent

#C15ECA

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646BB3

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

Preview Lab → · Contrast checker → · Palette generator →