#647BB4#647BB4

#647BB4 is a mid, moderate blue. Relative luminance 0.202; OKLCH L 58.9% C 0.092 H 266.8°. Best body text is #000000 at 5.03:1 contrast (WCAG AA passes).

Color values

HEX	#647BB4
RGB	rgb(100, 123, 180)
HSL	hsl(223, 35%, 55%)
HSV	hsv(223, 44%, 71%)
CMYK	cmyk(44.4%, 31.7%, 0%, 29.4%)
CIE-LAB	lab(52.03, 6.99, -32.76)
CIE-LCH	lch(52.03, 33.50, 282.04°)
OKLab	oklab(58.88% -0.0051 -0.0918)
OKLCH	oklch(58.88% 0.092 266.8)
XYZ	xyz(20.5741, 20.1694, 45.9801)
Luminance	0.2017 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647BB4 #B49D64

analogous

#64A3B4 #647BB4 #7564B4

triadic

#647BB4 #B4647B #7BB464

tetradic

#647BB4 #B464A3 #B49D64 #64B475

square

#647BB4 #B464A3 #B49D64 #64B475

split-complementary

#647BB4 #B47564 #A3B464

monochromatic

#33436A #475D93 #647BB4 #8D9EC8 #B6C1DC

Accessibility & contrast

On white

4.17

#647BB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.03

#647BB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647BB4

5.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647BB4	#FFFFFF	#000000	##000000
##647BB4	1.00	4.17	5.03	5.03
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.03	21.00	1.00	1.00
##000000	5.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B6

Deuteranopia (green-blind)

#5F79B3

Tritanopia (blue-blind)

#47878F

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #647bb4;
/* rgb */ color: rgb(100, 123, 180);
/* oklch */ color: oklch(58.9% 0.092 266.8);

Tailwind

colors: {
  custom: {
    50: '#94a1ca',
    500: '#647bb4',
    950: '#000000',
  },
}

SCSS

$custom: #647bb4;
$custom-light: #94a1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#647bb4",
  "rgb": {
    "r": 100,
    "g": 123,
    "b": 180
  },
  "hsl": {
    "h": 222.75,
    "s": 34.783,
    "l": 54.902
  },
  "oklch": {
    "l": 0.58879,
    "c": 0.09193,
    "h": 266.8
  },
  "luminance": 0.20171
}

Semantic roles & 50–950 ramp

primary

#647BB4

secondary

#CBC1A9

accent

#AB5DCB

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0E13

muted

#7E7E82

Preview Lab

Preview with #647BB4

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

Preview Lab → · Contrast checker → · Palette generator →