#646EA4#646EA4

#646EA4 is a mid, moderate blue. Relative luminance 0.165; OKLCH L 55.3% C 0.085 H 275.3°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#646EA4
RGB	rgb(100, 110, 164)
HSL	hsl(231, 26%, 52%)
HSV	hsv(231, 39%, 64%)
CMYK	cmyk(39%, 32.9%, 0%, 35.7%)
CIE-LAB	lab(47.68, 10.15, -30.26)
CIE-LCH	lch(47.68, 31.92, 288.54°)
OKLab	oklab(55.26% 0.0078 -0.0846)
OKLCH	oklch(55.26% 0.085 275.3)
XYZ	xyz(17.5303, 16.5408, 37.3838)
Luminance	0.1654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646EA4 #A49A64

analogous

#648EA4 #646EA4 #7A64A4

triadic

#646EA4 #A4646E #6EA464

tetradic

#646EA4 #A4648E #A49A64 #64A47A

square

#646EA4 #A4648E #A49A64 #64A47A

split-complementary

#646EA4 #A47A64 #8EA464

monochromatic

#343A59 #4B5380 #646EA4 #8B92BB #B1B6D1

Accessibility & contrast

On white

4.87

#646EA4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#646EA4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646EA4

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646EA4	#FFFFFF	#000000	##FFFFFF
##646EA4	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C74A6

Deuteranopia (green-blind)

#576FA3

Tritanopia (blue-blind)

#517981

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646ea4;
/* rgb */ color: rgb(100, 110, 164);
/* oklch */ color: oklch(55.3% 0.085 275.3);

Tailwind

colors: {
  custom: {
    50: '#9297bf',
    500: '#646ea4',
    950: '#000000',
  },
}

SCSS

$custom: #646ea4;
$custom-light: #9297bf;
$custom-dark: #000000;

JSON

{
  "hex": "#646ea4",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 164
  },
  "hsl": {
    "h": 230.625,
    "s": 26.016,
    "l": 51.765
  },
  "oklch": {
    "l": 0.55264,
    "c": 0.08495,
    "h": 275.3
  },
  "luminance": 0.16542
}

Semantic roles & 50–950 ramp

primary

#646EA4

secondary

#C0BCA4

accent

#B465C2

background

#F9F9FB

surface

#F1F2F7

border

#CBCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646EA4

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

Preview Lab → · Contrast checker → · Palette generator →