#646EA6#646EA6

#646EA6 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.4% C 0.088 H 275.4°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#646EA6
RGB	rgb(100, 110, 166)
HSL	hsl(231, 27%, 52%)
HSV	hsv(231, 40%, 65%)
CMYK	cmyk(39.8%, 33.7%, 0%, 34.9%)
CIE-LAB	lab(47.77, 10.73, -31.29)
CIE-LCH	lch(47.77, 33.07, 288.92°)
OKLab	oklab(55.37% 0.0083 -0.0876)
OKLCH	oklch(55.37% 0.088 275.4)
XYZ	xyz(17.7124, 16.6136, 38.3425)
Luminance	0.1661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646EA6 #A69C64

analogous

#648FA6 #646EA6 #7B64A6

triadic

#646EA6 #A6646E #6EA664

tetradic

#646EA6 #A6648F #A69C64 #64A67B

square

#646EA6 #A6648F #A69C64 #64A67B

split-complementary

#646EA6 #A67B64 #8FA664

monochromatic

#343A5B #4B5382 #646EA6 #8B92BC #B2B7D3

Accessibility & contrast

On white

4.86

#646EA6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#646EA6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646EA6

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646EA6	#FFFFFF	#000000	##FFFFFF
##646EA6	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B74A8

Deuteranopia (green-blind)

#566FA5

Tritanopia (blue-blind)

#507982

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646ea6;
/* rgb */ color: rgb(100, 110, 166);
/* oklch */ color: oklch(55.4% 0.088 275.4);

Tailwind

colors: {
  custom: {
    50: '#9397c0',
    500: '#646ea6',
    950: '#000000',
  },
}

SCSS

$custom: #646ea6;
$custom-light: #9397c0;
$custom-dark: #000000;

JSON

{
  "hex": "#646ea6",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 166
  },
  "hsl": {
    "h": 230.909,
    "s": 27.049,
    "l": 52.157
  },
  "oklch": {
    "l": 0.55367,
    "c": 0.08795,
    "h": 275.4
  },
  "luminance": 0.16614
}

Semantic roles & 50–950 ramp

primary

#646EA6

secondary

#C1BDA4

accent

#B564C3

background

#F9F9FB

surface

#F1F2F7

border

#CBCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646EA6

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

Preview Lab → · Contrast checker → · Palette generator →