#646FA6#646FA6

#646FA6 is a mid, moderate blue. Relative luminance 0.168; OKLCH L 55.6% C 0.087 H 274.6°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#646FA6
RGB	rgb(100, 111, 166)
HSL	hsl(230, 27%, 52%)
HSV	hsv(230, 40%, 65%)
CMYK	cmyk(39.8%, 33.1%, 0%, 34.9%)
CIE-LAB	lab(48.05, 10.12, -30.85)
CIE-LCH	lch(48.05, 32.47, 288.15°)
OKLab	oklab(55.58% 0.007 -0.0863)
OKLCH	oklch(55.58% 0.087 274.6)
XYZ	xyz(17.8209, 16.8306, 38.3786)
Luminance	0.1683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FA6 #A69B64

analogous

#6490A6 #646FA6 #7A64A6

triadic

#646FA6 #A6646F #6FA664

tetradic

#646FA6 #A66490 #A69B64 #64A67A

square

#646FA6 #A66490 #A69B64 #64A67A

split-complementary

#646FA6 #A67A64 #90A664

monochromatic

#343B5B #4B5482 #646FA6 #8B93BC #B2B7D3

Accessibility & contrast

On white

4.81

#646FA6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#646FA6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646FA6

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FA6	#FFFFFF	#000000	##FFFFFF
##646FA6	1.00	4.81	4.37	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D75A8

Deuteranopia (green-blind)

#5870A5

Tritanopia (blue-blind)

#507A83

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646fa6;
/* rgb */ color: rgb(100, 111, 166);
/* oklch */ color: oklch(55.6% 0.087 274.6);

Tailwind

colors: {
  custom: {
    50: '#9398c0',
    500: '#646fa6',
    950: '#000000',
  },
}

SCSS

$custom: #646fa6;
$custom-light: #9398c0;
$custom-dark: #000000;

JSON

{
  "hex": "#646fa6",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 166
  },
  "hsl": {
    "h": 230,
    "s": 27.049,
    "l": 52.157
  },
  "oklch": {
    "l": 0.5558,
    "c": 0.08658,
    "h": 274.6
  },
  "luminance": 0.16831
}

Semantic roles & 50–950 ramp

primary

#646FA6

secondary

#C1BDA4

accent

#B464C3

background

#F9F9FB

surface

#F1F2F7

border

#CBCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646FA6

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

Preview Lab → · Contrast checker → · Palette generator →