#646BB4#646BB4

#646BB4 is a mid, moderate blue. Relative luminance 0.165; OKLCH L 55.5% C 0.113 H 277.9°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#646BB4
RGB	rgb(100, 107, 180)
HSL	hsl(235, 35%, 55%)
HSV	hsv(235, 44%, 71%)
CMYK	cmyk(44.4%, 40.6%, 0%, 29.4%)
CIE-LAB	lab(47.65, 16.71, -39.65)
CIE-LCH	lch(47.65, 43.03, 292.86°)
OKLab	oklab(55.5% 0.0155 -0.1119)
OKLCH	oklch(55.5% 0.113 277.9)
XYZ	xyz(18.7490, 16.5191, 45.3718)
Luminance	0.1652 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB4 #B4AD64

analogous

#6493B4 #646BB4 #8564B4

triadic

#646BB4 #B4646B #6BB464

tetradic

#646BB4 #B46493 #B4AD64 #64B485

square

#646BB4 #B46493 #B4AD64 #64B485

split-complementary

#646BB4 #B48564 #93B464

monochromatic

#33386A #474E93 #646BB4 #8D92C8 #B6BADC

Accessibility & contrast

On white

4.88

#646BB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.30

#646BB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB4

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB4	#FFFFFF	#000000	##FFFFFF
##646BB4	1.00	4.88	4.30	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.30	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5074B7

Deuteranopia (green-blind)

#4A6EB2

Tritanopia (blue-blind)

#497A87

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646bb4;
/* rgb */ color: rgb(100, 107, 180);
/* oklch */ color: oklch(55.5% 0.113 277.9);

Tailwind

colors: {
  custom: {
    50: '#9495cb',
    500: '#646bb4',
    950: '#000000',
  },
}

SCSS

$custom: #646bb4;
$custom-light: #9495cb;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb4",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 180
  },
  "hsl": {
    "h": 234.75,
    "s": 34.783,
    "l": 54.902
  },
  "oklch": {
    "l": 0.55501,
    "c": 0.11293,
    "h": 277.9
  },
  "luminance": 0.1652
}

Semantic roles & 50–950 ramp

primary

#646BB4

secondary

#CBC8A9

accent

#C15DCB

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646BB4

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

Preview Lab → · Contrast checker → · Palette generator →