#646DBD#646DBD

#646DBD is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.4% C 0.123 H 276.8°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#646DBD
RGB	rgb(100, 109, 189)
HSL	hsl(234, 40%, 57%)
HSV	hsv(234, 47%, 74%)
CMYK	cmyk(47.1%, 42.3%, 0%, 25.9%)
CIE-LAB	lab(48.66, 18.22, -43.26)
CIE-LCH	lch(48.66, 46.94, 292.84°)
OKLab	oklab(56.43% 0.0147 -0.1224)
OKLCH	oklch(56.43% 0.123 276.8)
XYZ	xyz(19.9066, 17.3197, 50.4283)
Luminance	0.1732 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DBD #BDB464

analogous

#649ABD #646DBD #8864BD

triadic

#646DBD #BD646D #6DBD64

tetradic

#646DBD #BD649A #BDB464 #64BD88

square

#646DBD #BD649A #BDB464 #64BD88

split-complementary

#646DBD #BD8864 #9ABD64

monochromatic

#323975 #444DA0 #646DBD #8F95CF #BABEE2

Accessibility & contrast

On white

4.70

#646DBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#646DBD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646DBD

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DBD	#FFFFFF	#000000	##FFFFFF
##646DBD	1.00	4.70	4.46	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E77C0

Deuteranopia (green-blind)

#4770BB

Tritanopia (blue-blind)

#447E8C

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #646dbd;
/* rgb */ color: rgb(100, 109, 189);
/* oklch */ color: oklch(56.4% 0.123 276.8);

Tailwind

colors: {
  custom: {
    50: '#9596d1',
    500: '#646dbd',
    950: '#000000',
  },
}

SCSS

$custom: #646dbd;
$custom-light: #9596d1;
$custom-dark: #000000;

JSON

{
  "hex": "#646dbd",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 189
  },
  "hsl": {
    "h": 233.933,
    "s": 40.271,
    "l": 56.667
  },
  "oklch": {
    "l": 0.56431,
    "c": 0.12328,
    "h": 276.8
  },
  "luminance": 0.17321
}

Semantic roles & 50–950 ramp

primary

#646DBD

secondary

#D1CDAC

accent

#C458D0

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646DBD

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

Preview Lab → · Contrast checker → · Palette generator →