#647BB7#647BB7

#647BB7 is a mid, moderate blue. Relative luminance 0.203; OKLCH L 59.0% C 0.096 H 267.4°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#647BB7
RGB	rgb(100, 123, 183)
HSL	hsl(223, 37%, 55%)
HSV	hsv(223, 45%, 72%)
CMYK	cmyk(45.4%, 32.8%, 0%, 28.2%)
CIE-LAB	lab(52.17, 7.89, -34.27)
CIE-LCH	lch(52.17, 35.17, 282.96°)
OKLab	oklab(59.03% -0.0043 -0.0962)
OKLCH	oklch(59.03% 0.096 267.4)
XYZ	xyz(20.8830, 20.2929, 47.6071)
Luminance	0.2029 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647BB7 #B7A064

analogous

#64A5B7 #647BB7 #7664B7

triadic

#647BB7 #B7647B #7BB764

tetradic

#647BB7 #B764A5 #B7A064 #64B776

square

#647BB7 #B764A5 #B7A064 #64B776

split-complementary

#647BB7 #B77664 #A5B764

monochromatic

#33436E #465D97 #647BB7 #8E9FCA #B8C2DE

Accessibility & contrast

On white

4.15

#647BB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#647BB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647BB7

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647BB7	#FFFFFF	#000000	##000000
##647BB7	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6580BA

Deuteranopia (green-blind)

#5D79B6

Tritanopia (blue-blind)

#458891

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #647bb7;
/* rgb */ color: rgb(100, 123, 183);
/* oklch */ color: oklch(59.0% 0.096 267.4);

Tailwind

colors: {
  custom: {
    50: '#94a1cd',
    500: '#647bb7',
    950: '#000000',
  },
}

SCSS

$custom: #647bb7;
$custom-light: #94a1cd;
$custom-dark: #000000;

JSON

{
  "hex": "#647bb7",
  "rgb": {
    "r": 100,
    "g": 123,
    "b": 183
  },
  "hsl": {
    "h": 223.373,
    "s": 36.564,
    "l": 55.49
  },
  "oklch": {
    "l": 0.59032,
    "c": 0.09626,
    "h": 267.4
  },
  "luminance": 0.20294
}

Semantic roles & 50–950 ramp

primary

#647BB7

secondary

#CDC3AA

accent

#AD5BCD

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0D0E13

muted

#7E7E82

Preview Lab

Preview with #647BB7

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

Preview Lab → · Contrast checker → · Palette generator →