#646FBD#646FBD

#646FBD is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.8% C 0.121 H 275.8°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#646FBD
RGB	rgb(100, 111, 189)
HSL	hsl(233, 40%, 57%)
HSV	hsv(233, 47%, 74%)
CMYK	cmyk(47.1%, 41.3%, 0%, 25.9%)
CIE-LAB	lab(49.19, 17.00, -42.41)
CIE-LCH	lch(49.19, 45.69, 291.84°)
OKLab	oklab(56.84% 0.0122 -0.1199)
OKLCH	oklch(56.84% 0.121 275.8)
XYZ	xyz(20.1224, 17.7512, 50.5003)
Luminance	0.1775 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FBD #BDB264

analogous

#649CBD #646FBD #8664BD

triadic

#646FBD #BD646F #6FBD64

tetradic

#646FBD #BD649C #BDB264 #64BD86

square

#646FBD #BD649C #BDB264 #64BD86

split-complementary

#646FBD #BD8664 #9CBD64

monochromatic

#323A75 #444FA0 #646FBD #8F97CF #BABFE2

Accessibility & contrast

On white

4.61

#646FBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#646FBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #646FBD

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FBD	#FFFFFF	#000000	##FFFFFF
##646FBD	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5179C0

Deuteranopia (green-blind)

#4A72BB

Tritanopia (blue-blind)

#437F8D

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #646fbd;
/* rgb */ color: rgb(100, 111, 189);
/* oklch */ color: oklch(56.8% 0.121 275.8);

Tailwind

colors: {
  custom: {
    50: '#9598d1',
    500: '#646fbd',
    950: '#000000',
  },
}

SCSS

$custom: #646fbd;
$custom-light: #9598d1;
$custom-dark: #000000;

JSON

{
  "hex": "#646fbd",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 189
  },
  "hsl": {
    "h": 232.584,
    "s": 40.271,
    "l": 56.667
  },
  "oklch": {
    "l": 0.56838,
    "c": 0.12054,
    "h": 275.8
  },
  "luminance": 0.17752
}

Semantic roles & 50–950 ramp

primary

#646FBD

secondary

#D1CCAC

accent

#C158D0

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646FBD

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

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