#646BB0#646BB0

#646BB0 is a mid, moderate blue. Relative luminance 0.164; OKLCH L 55.3% C 0.107 H 277.9°. Best body text is #FFFFFF at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#646BB0
RGB	rgb(100, 107, 176)
HSL	hsl(234, 32%, 54%)
HSV	hsv(234, 43%, 69%)
CMYK	cmyk(43.2%, 39.2%, 0%, 31%)
CIE-LAB	lab(47.44, 15.51, -37.64)
CIE-LCH	lch(47.44, 40.72, 292.40°)
OKLab	oklab(55.28% 0.0147 -0.106)
OKLCH	oklch(55.28% 0.107 277.9)
XYZ	xyz(18.3474, 16.3584, 43.2566)
Luminance	0.1636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB0 #B0A964

analogous

#6491B0 #646BB0 #8364B0

triadic

#646BB0 #B0646B #6BB064

tetradic

#646BB0 #B06491 #B0A964 #64B083

square

#646BB0 #B06491 #B0A964 #64B083

split-complementary

#646BB0 #B08364 #91B064

monochromatic

#343866 #494F8E #646BB0 #8D92C5 #B5B8D9

Accessibility & contrast

On white

4.92

#646BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.27

#646BB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB0

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB0	#FFFFFF	#000000	##FFFFFF
##646BB0	1.00	4.92	4.27	4.92
#FFFFFF	4.92	1.00	21.00	1.00
#000000	4.27	21.00	1.00	21.00
##FFFFFF	4.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5274B3

Deuteranopia (green-blind)

#4D6EAE

Tritanopia (blue-blind)

#4B7985

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646bb0;
/* rgb */ color: rgb(100, 107, 176);
/* oklch */ color: oklch(55.3% 0.107 277.9);

Tailwind

colors: {
  custom: {
    50: '#9495c8',
    500: '#646bb0',
    950: '#000000',
  },
}

SCSS

$custom: #646bb0;
$custom-light: #9495c8;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb0",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 176
  },
  "hsl": {
    "h": 234.474,
    "s": 32.479,
    "l": 54.118
  },
  "oklch": {
    "l": 0.55275,
    "c": 0.10704,
    "h": 277.9
  },
  "luminance": 0.16359
}

Semantic roles & 50–950 ramp

primary

#646BB0

secondary

#C8C5A8

accent

#BF5FC9

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646BB0

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

Preview Lab → · Contrast checker → · Palette generator →