#646EA5#646EA5

#646EA5 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.3% C 0.086 H 275.3°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#646EA5
RGB	rgb(100, 110, 165)
HSL	hsl(231, 27%, 52%)
HSV	hsv(231, 39%, 65%)
CMYK	cmyk(39.4%, 33.3%, 0%, 35.3%)
CIE-LAB	lab(47.72, 10.44, -30.77)
CIE-LCH	lch(47.72, 32.49, 288.73°)
OKLab	oklab(55.32% 0.0081 -0.0861)
OKLCH	oklch(55.32% 0.086 275.3)
XYZ	xyz(17.6210, 16.5770, 37.8612)
Luminance	0.1658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646EA5 #A59B64

analogous

#648FA5 #646EA5 #7B64A5

triadic

#646EA5 #A5646E #6EA564

tetradic

#646EA5 #A5648F #A59B64 #64A57B

square

#646EA5 #A5648F #A59B64 #64A57B

split-complementary

#646EA5 #A57B64 #8FA564

monochromatic

#343A5A #4B5381 #646EA5 #8B92BB #B1B6D2

Accessibility & contrast

On white

4.87

#646EA5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#646EA5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646EA5

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646EA5	#FFFFFF	#000000	##FFFFFF
##646EA5	1.00	4.87	4.32	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C74A7

Deuteranopia (green-blind)

#576FA4

Tritanopia (blue-blind)

#507982

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646ea5;
/* rgb */ color: rgb(100, 110, 165);
/* oklch */ color: oklch(55.3% 0.086 275.3);

Tailwind

colors: {
  custom: {
    50: '#9297c0',
    500: '#646ea5',
    950: '#000000',
  },
}

SCSS

$custom: #646ea5;
$custom-light: #9297c0;
$custom-dark: #000000;

JSON

{
  "hex": "#646ea5",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 165
  },
  "hsl": {
    "h": 230.769,
    "s": 26.531,
    "l": 51.961
  },
  "oklch": {
    "l": 0.55315,
    "c": 0.08645,
    "h": 275.3
  },
  "luminance": 0.16578
}

Semantic roles & 50–950 ramp

primary

#646EA5

secondary

#C1BCA4

accent

#B465C3

background

#F9F9FB

surface

#F1F2F7

border

#CBCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646EA5

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

Preview Lab → · Contrast checker → · Palette generator →