#646CA6#646CA6

#646CA6 is a mid, moderate blue. Relative luminance 0.162; OKLCH L 54.9% C 0.091 H 277.0°. Best body text is #FFFFFF at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#646CA6
RGB	rgb(100, 108, 166)
HSL	hsl(233, 27%, 52%)
HSV	hsv(233, 40%, 65%)
CMYK	cmyk(39.8%, 34.9%, 0%, 34.9%)
CIE-LAB	lab(47.22, 11.95, -32.15)
CIE-LCH	lch(47.22, 34.30, 290.39°)
OKLab	oklab(54.94% 0.011 -0.09)
OKLCH	oklch(54.94% 0.091 277)
XYZ	xyz(17.4990, 16.1869, 38.2714)
Luminance	0.1619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CA6 #A69E64

analogous

#648DA6 #646CA6 #7D64A6

triadic

#646CA6 #A6646C #6CA664

tetradic

#646CA6 #A6648D #A69E64 #64A67D

square

#646CA6 #A6648D #A69E64 #64A67D

split-complementary

#646CA6 #A67D64 #8DA664

monochromatic

#34395B #4B5182 #646CA6 #8B91BC #B2B6D3

Accessibility & contrast

On white

4.96

#646CA6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.24

#646CA6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646CA6

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CA6	#FFFFFF	#000000	##FFFFFF
##646CA6	1.00	4.96	4.24	4.96
#FFFFFF	4.96	1.00	21.00	1.00
#000000	4.24	21.00	1.00	21.00
##FFFFFF	4.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5973A8

Deuteranopia (green-blind)

#546EA5

Tritanopia (blue-blind)

#507781

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #646ca6;
/* rgb */ color: rgb(100, 108, 166);
/* oklch */ color: oklch(54.9% 0.091 277.0);

Tailwind

colors: {
  custom: {
    50: '#9396c0',
    500: '#646ca6',
    950: '#000000',
  },
}

SCSS

$custom: #646ca6;
$custom-light: #9396c0;
$custom-dark: #000000;

JSON

{
  "hex": "#646ca6",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 166
  },
  "hsl": {
    "h": 232.727,
    "s": 27.049,
    "l": 52.157
  },
  "oklch": {
    "l": 0.54942,
    "c": 0.09072,
    "h": 277
  },
  "luminance": 0.16188
}

Semantic roles & 50–950 ramp

primary

#646CA6

secondary

#C1BEA4

accent

#B864C3

background

#F9F9FB

surface

#F1F1F7

border

#CBCBD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #646CA6

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

Preview Lab → · Contrast checker → · Palette generator →