#646EA3#646EA3

#646EA3 is a mid, moderate blue. Relative luminance 0.165; OKLCH L 55.2% C 0.083 H 275.2°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#646EA3
RGB	rgb(100, 110, 163)
HSL	hsl(230, 26%, 52%)
HSV	hsv(230, 39%, 64%)
CMYK	cmyk(38.7%, 32.5%, 0%, 36.1%)
CIE-LAB	lab(47.63, 9.86, -29.75)
CIE-LCH	lch(47.63, 31.34, 288.34°)
OKLab	oklab(55.21% 0.0075 -0.0831)
OKLCH	oklch(55.21% 0.083 275.2)
XYZ	xyz(17.4404, 16.5048, 36.9100)
Luminance	0.1651 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646EA3 #A39964

analogous

#648EA3 #646EA3 #7A64A3

triadic

#646EA3 #A3646E #6EA364

tetradic

#646EA3 #A3648E #A39964 #64A37A

square

#646EA3 #A3648E #A39964 #64A37A

split-complementary

#646EA3 #A37A64 #8EA364

monochromatic

#343A58 #4B537F #646EA3 #8A92BA #B1B6D1

Accessibility & contrast

On white

4.88

#646EA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#646EA3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646EA3

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646EA3	#FFFFFF	#000000	##FFFFFF
##646EA3	1.00	4.88	4.30	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D74A5

Deuteranopia (green-blind)

#586FA2

Tritanopia (blue-blind)

#517881

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646ea3;
/* rgb */ color: rgb(100, 110, 163);
/* oklch */ color: oklch(55.2% 0.083 275.2);

Tailwind

colors: {
  custom: {
    50: '#9297be',
    500: '#646ea3',
    950: '#000000',
  },
}

SCSS

$custom: #646ea3;
$custom-light: #9297be;
$custom-dark: #000000;

JSON

{
  "hex": "#646ea3",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 163
  },
  "hsl": {
    "h": 230.476,
    "s": 25.506,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55213,
    "c": 0.08344,
    "h": 275.2
  },
  "luminance": 0.16506
}

Semantic roles & 50–950 ramp

primary

#646EA3

secondary

#BFBBA4

accent

#B366C2

background

#F9F9FB

surface

#F1F2F7

border

#CBCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646EA3

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

Preview Lab → · Contrast checker → · Palette generator →