#647BB5#647BB5

#647BB5 is a mid, moderate blue. Relative luminance 0.202; OKLCH L 58.9% C 0.093 H 267.0°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#647BB5
RGB	rgb(100, 123, 181)
HSL	hsl(223, 35%, 55%)
HSV	hsv(223, 45%, 71%)
CMYK	cmyk(44.8%, 32%, 0%, 29%)
CIE-LAB	lab(52.07, 7.29, -33.26)
CIE-LCH	lch(52.07, 34.05, 282.36°)
OKLab	oklab(58.93% -0.0048 -0.0932)
OKLCH	oklch(58.93% 0.093 267)
XYZ	xyz(20.6763, 20.2103, 46.5186)
Luminance	0.2021 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647BB5 #B59E64

analogous

#64A3B5 #647BB5 #7664B5

triadic

#647BB5 #B5647B #7BB564

tetradic

#647BB5 #B564A3 #B59E64 #64B576

square

#647BB5 #B564A3 #B59E64 #64B576

split-complementary

#647BB5 #B57664 #A3B564

monochromatic

#33436B #475D95 #647BB5 #8D9EC9 #B7C2DD

Accessibility & contrast

On white

4.16

#647BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#647BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647BB5

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647BB5	#FFFFFF	#000000	##000000
##647BB5	1.00	4.16	5.04	5.04
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6680B7

Deuteranopia (green-blind)

#5E79B4

Tritanopia (blue-blind)

#478790

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #647bb5;
/* rgb */ color: rgb(100, 123, 181);
/* oklch */ color: oklch(58.9% 0.093 267.0);

Tailwind

colors: {
  custom: {
    50: '#94a1cb',
    500: '#647bb5',
    950: '#000000',
  },
}

SCSS

$custom: #647bb5;
$custom-light: #94a1cb;
$custom-dark: #000000;

JSON

{
  "hex": "#647bb5",
  "rgb": {
    "r": 100,
    "g": 123,
    "b": 181
  },
  "hsl": {
    "h": 222.963,
    "s": 35.371,
    "l": 55.098
  },
  "oklch": {
    "l": 0.5893,
    "c": 0.09338,
    "h": 267
  },
  "luminance": 0.20211
}

Semantic roles & 50–950 ramp

primary

#647BB5

secondary

#CBC2A9

accent

#AC5CCB

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0E13

muted

#7E7E82

Preview Lab

Preview with #647BB5

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

Preview Lab → · Contrast checker → · Palette generator →