#646DCB#646DCB

#646DCB is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.3% C 0.143 H 276.8°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#646DCB
RGB	rgb(100, 109, 203)
HSL	hsl(235, 50%, 59%)
HSV	hsv(235, 51%, 80%)
CMYK	cmyk(50.7%, 46.3%, 0%, 20.4%)
CIE-LAB	lab(49.44, 22.57, -50.05)
CIE-LCH	lch(49.44, 54.91, 294.27°)
OKLab	oklab(57.28% 0.0169 -0.1423)
OKLCH	oklch(57.28% 0.143 276.8)
XYZ	xyz(21.5003, 17.9571, 58.8215)
Luminance	0.1796 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DCB #CBC264

analogous

#64A1CB #646DCB #8F64CB

triadic

#646DCB #CB646D #6DCB64

tetradic

#646DCB #CB64A1 #CBC264 #64CB8F

square

#646DCB #CB64A1 #CBC264 #64CB8F

split-complementary

#646DCB #CB8F64 #A1CB64

monochromatic

#2D3587 #3D47B5 #646DCB #9298DA #C0C3EA

Accessibility & contrast

On white

4.57

#646DCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#646DCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646DCB

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DCB	#FFFFFF	#000000	##000000
##646DCB	1.00	4.57	4.59	4.59
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#447ACE

Deuteranopia (green-blind)

#3A72C9

Tritanopia (blue-blind)

#398192

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #646dcb;
/* rgb */ color: rgb(100, 109, 203);
/* oklch */ color: oklch(57.3% 0.143 276.8);

Tailwind

colors: {
  custom: {
    50: '#9796db',
    500: '#646dcb',
    950: '#000000',
  },
}

SCSS

$custom: #646dcb;
$custom-light: #9796db;
$custom-dark: #000000;

JSON

{
  "hex": "#646dcb",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 203
  },
  "hsl": {
    "h": 234.757,
    "s": 49.758,
    "l": 59.412
  },
  "oklch": {
    "l": 0.57282,
    "c": 0.14332,
    "h": 276.8
  },
  "luminance": 0.17958
}

Semantic roles & 50–950 ramp

primary

#646DCB

secondary

#D9D6B1

accent

#CD4FD9

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646DCB

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

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