#645E89#645E89

#645E89 is a mid, moderate blue. Relative luminance 0.125; OKLCH L 50.5% C 0.068 H 290.1°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).

Color values

HEX	#645E89
RGB	rgb(100, 94, 137)
HSL	hsl(248, 19%, 45%)
HSV	hsv(248, 31%, 54%)
CMYK	cmyk(27%, 31.4%, 0%, 46.3%)
CIE-LAB	lab(42.03, 12.48, -22.99)
CIE-LCH	lch(42.03, 26.16, 298.50°)
OKLab	oklab(50.51% 0.0234 -0.0636)
OKLCH	oklch(50.51% 0.068 290.1)
XYZ	xyz(13.7725, 12.5206, 25.3532)
Luminance	0.1252 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645E89 #83895E

analogous

#5E6D89 #645E89 #795E89

triadic

#645E89 #89645E #5E8964

tetradic

#645E89 #895E6D #83895E #5E8979

square

#645E89 #895E6D #83895E #5E8979

split-complementary

#645E89 #89795E #6D895E

monochromatic

#2F2C40 #4A4565 #645E89 #837EA6 #A6A2BF

Accessibility & contrast

On white

5.99

#645E89 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.50

#645E89 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645E89

5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645E89	#FFFFFF	#000000	##FFFFFF
##645E89	1.00	5.99	3.50	5.99
#FFFFFF	5.99	1.00	21.00	1.00
#000000	3.50	21.00	1.00	21.00
##FFFFFF	5.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#53648B

Deuteranopia (green-blind)

#536288

Tritanopia (blue-blind)

#5C656D

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #645e89;
/* rgb */ color: rgb(100, 94, 137);
/* oklch */ color: oklch(50.5% 0.068 290.1);

Tailwind

colors: {
  custom: {
    50: '#918bab',
    500: '#645e89',
    950: '#000000',
  },
}

SCSS

$custom: #645e89;
$custom-light: #918bab;
$custom-dark: #000000;

JSON

{
  "hex": "#645e89",
  "rgb": {
    "r": 100,
    "g": 94,
    "b": 137
  },
  "hsl": {
    "h": 248.372,
    "s": 18.615,
    "l": 45.294
  },
  "oklch": {
    "l": 0.50506,
    "c": 0.0678,
    "h": 290.1
  },
  "luminance": 0.12521
}

Semantic roles & 50–950 ramp

primary

#645E89

secondary

#AAAE95

accent

#BB6DB0

background

#F8F8FA

surface

#F0F0F4

border

#CBCBCE

text

#0D0C10

muted

#7D7D7F

Preview Lab

Preview with #645E89

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

Preview Lab → · Contrast checker → · Palette generator →