#647BBB#647BBB

#647BBB is a mid, moderate blue. Relative luminance 0.205; OKLCH L 59.2% C 0.102 H 268.2°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#647BBB
RGB	rgb(100, 123, 187)
HSL	hsl(224, 39%, 56%)
HSV	hsv(224, 47%, 73%)
CMYK	cmyk(46.5%, 34.2%, 0%, 26.7%)
CIE-LAB	lab(52.36, 9.09, -36.27)
CIE-LCH	lch(52.36, 37.39, 284.07°)
OKLab	oklab(59.24% -0.0032 -0.102)
OKLCH	oklch(59.24% 0.102 268.2)
XYZ	xyz(21.3053, 20.4618, 49.8310)
Luminance	0.2046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647BBB #BBA464

analogous

#64A7BB #647BBB #7964BB

triadic

#647BBB #BB647B #7BBB64

tetradic

#647BBB #BB64A7 #BBA464 #64BB79

square

#647BBB #BB64A7 #BBA464 #64BB79

split-complementary

#647BBB #BB7964 #A7BB64

monochromatic

#324372 #455C9D #647BBB #8F9FCE #B9C3E0

Accessibility & contrast

On white

4.12

#647BBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#647BBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647BBB

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647BBB	#FFFFFF	#000000	##000000
##647BBB	1.00	4.12	5.09	5.09
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6381BE

Deuteranopia (green-blind)

#5B79BA

Tritanopia (blue-blind)

#438892

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #647bbb;
/* rgb */ color: rgb(100, 123, 187);
/* oklch */ color: oklch(59.2% 0.102 268.2);

Tailwind

colors: {
  custom: {
    50: '#94a0cf',
    500: '#647bbb',
    950: '#000000',
  },
}

SCSS

$custom: #647bbb;
$custom-light: #94a0cf;
$custom-dark: #000000;

JSON

{
  "hex": "#647bbb",
  "rgb": {
    "r": 100,
    "g": 123,
    "b": 187
  },
  "hsl": {
    "h": 224.138,
    "s": 39.013,
    "l": 56.275
  },
  "oklch": {
    "l": 0.5924,
    "c": 0.10202,
    "h": 268.2
  },
  "luminance": 0.20463
}

Semantic roles & 50–950 ramp

primary

#647BBB

secondary

#CFC6AB

accent

#B059CF

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0D0E14

muted

#7E7E82

Preview Lab

Preview with #647BBB

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

Preview Lab → · Contrast checker → · Palette generator →