#647BB3#647BB3

#647BB3 is a mid, moderate blue. Relative luminance 0.201; OKLCH L 58.8% C 0.090 H 266.6°. Best body text is #000000 at 5.03:1 contrast (WCAG AA passes).

Color values

HEX	#647BB3
RGB	rgb(100, 123, 179)
HSL	hsl(223, 34%, 55%)
HSV	hsv(223, 44%, 70%)
CMYK	cmyk(44.1%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(51.98, 6.69, -32.25)
CIE-LCH	lch(51.98, 32.94, 281.72°)
OKLab	oklab(58.83% -0.0054 -0.0903)
OKLCH	oklch(58.83% 0.09 266.6)
XYZ	xyz(20.4726, 20.1288, 45.4456)
Luminance	0.2013 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647BB3 #B39C64

analogous

#64A2B3 #647BB3 #7564B3

triadic

#647BB3 #B3647B #7BB364

tetradic

#647BB3 #B364A2 #B39C64 #64B375

square

#647BB3 #B364A2 #B39C64 #64B375

split-complementary

#647BB3 #B37564 #A2B364

monochromatic

#344369 #485D92 #647BB3 #8D9EC7 #B6C1DB

Accessibility & contrast

On white

4.18

#647BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.03

#647BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647BB3

5.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647BB3	#FFFFFF	#000000	##000000
##647BB3	1.00	4.18	5.03	5.03
#FFFFFF	4.18	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)

#6780B5

Deuteranopia (green-blind)

#5F79B2

Tritanopia (blue-blind)

#48878F

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #647bb3;
/* rgb */ color: rgb(100, 123, 179);
/* oklch */ color: oklch(58.8% 0.090 266.6);

Tailwind

colors: {
  custom: {
    50: '#94a1ca',
    500: '#647bb3',
    950: '#000000',
  },
}

SCSS

$custom: #647bb3;
$custom-light: #94a1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#647bb3",
  "rgb": {
    "r": 100,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 222.532,
    "s": 34.199,
    "l": 54.706
  },
  "oklch": {
    "l": 0.58829,
    "c": 0.09049,
    "h": 266.6
  },
  "luminance": 0.2013
}

Semantic roles & 50–950 ramp

primary

#647BB3

secondary

#CAC0A9

accent

#AB5ECA

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0E13

muted

#7E7E82

Preview Lab

Preview with #647BB3

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

Preview Lab → · Contrast checker → · Palette generator →