#646FBF#646FBF

#646FBF is a mid, vivid blue. Relative luminance 0.178; OKLCH L 57.0% C 0.123 H 275.8°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#646FBF
RGB	rgb(100, 111, 191)
HSL	hsl(233, 42%, 57%)
HSV	hsv(233, 48%, 75%)
CMYK	cmyk(47.6%, 41.9%, 0%, 25.1%)
CIE-LAB	lab(49.30, 17.61, -43.39)
CIE-LCH	lch(49.30, 46.83, 292.09°)
OKLab	oklab(56.96% 0.0126 -0.1228)
OKLCH	oklch(56.96% 0.123 275.8)
XYZ	xyz(20.3410, 17.8387, 51.6515)
Luminance	0.1784 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646FBF #BFB464

analogous

#649DBF #646FBF #8664BF

triadic

#646FBF #BF646F #6FBF64

tetradic

#646FBF #BF649D #BFB464 #64BF86

square

#646FBF #BF649D #BFB464 #64BF86

split-complementary

#646FBF #BF8664 #9DBF64

monochromatic

#313A77 #434FA3 #646FBF #8F97D1 #BBBFE3

Accessibility & contrast

On white

4.60

#646FBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#646FBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #646FBF

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646FBF	#FFFFFF	#000000	##FFFFFF
##646FBF	1.00	4.60	4.57	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5079C2

Deuteranopia (green-blind)

#4872BD

Tritanopia (blue-blind)

#42808E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #646fbf;
/* rgb */ color: rgb(100, 111, 191);
/* oklch */ color: oklch(57.0% 0.123 275.8);

Tailwind

colors: {
  custom: {
    50: '#9598d3',
    500: '#646fbf',
    950: '#000000',
  },
}

SCSS

$custom: #646fbf;
$custom-light: #9598d3;
$custom-dark: #000000;

JSON

{
  "hex": "#646fbf",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 191
  },
  "hsl": {
    "h": 232.747,
    "s": 41.553,
    "l": 57.059
  },
  "oklch": {
    "l": 0.56955,
    "c": 0.12343,
    "h": 275.8
  },
  "luminance": 0.1784
}

Semantic roles & 50–950 ramp

primary

#646FBF

secondary

#D2CDAD

accent

#C356D1

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #646FBF

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

Preview Lab → · Contrast checker → · Palette generator →