#646FA3#646FA3

#646FA3 is a mid, moderate blue. Relative luminance 0.167; OKLCH L 55.4% C 0.082 H 274.3°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#646FA3
RGB	rgb(100, 111, 163)
HSL	hsl(230, 26%, 52%)
HSV	hsv(230, 39%, 64%)
CMYK	cmyk(38.7%, 31.9%, 0%, 36.1%)
CIE-LAB	lab(47.91, 9.25, -29.31)
CIE-LCH	lch(47.91, 30.74, 287.51°)
OKLab	oklab(55.43% 0.0061 -0.0819)
OKLCH	oklch(55.43% 0.082 274.3)
XYZ	xyz(17.5489, 16.7218, 36.9462)
Luminance	0.1672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FA3 #A39864

analogous

#648FA3 #646FA3 #7964A3

triadic

#646FA3 #A3646F #6FA364

tetradic

#646FA3 #A3648F #A39864 #64A379

square

#646FA3 #A3648F #A39864 #64A379

split-complementary

#646FA3 #A37964 #8FA364

monochromatic

#343B58 #4B547F #646FA3 #8A93BA #B1B6D1

Accessibility & contrast

On white

4.83

#646FA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#646FA3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646FA3

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FA3	#FFFFFF	#000000	##FFFFFF
##646FA3	1.00	4.83	4.34	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E74A5

Deuteranopia (green-blind)

#596FA2

Tritanopia (blue-blind)

#517982

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646fa3;
/* rgb */ color: rgb(100, 111, 163);
/* oklch */ color: oklch(55.4% 0.082 274.3);

Tailwind

colors: {
  custom: {
    50: '#9298be',
    500: '#646fa3',
    950: '#000000',
  },
}

SCSS

$custom: #646fa3;
$custom-light: #9298be;
$custom-dark: #000000;

JSON

{
  "hex": "#646fa3",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 163
  },
  "hsl": {
    "h": 229.524,
    "s": 25.506,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55428,
    "c": 0.08208,
    "h": 274.3
  },
  "luminance": 0.16723
}

Semantic roles & 50–950 ramp

primary

#646FA3

secondary

#BFBAA4

accent

#B266C2

background

#F9F9FB

surface

#F1F2F7

border

#CBCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646FA3

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

Preview Lab → · Contrast checker → · Palette generator →