#646BB8#646BB8

#646BB8 is a mid, moderate blue. Relative luminance 0.167; OKLCH L 55.7% C 0.119 H 277.9°. Best body text is #FFFFFF at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#646BB8
RGB	rgb(100, 107, 184)
HSL	hsl(235, 37%, 56%)
HSV	hsv(235, 46%, 72%)
CMYK	cmyk(45.7%, 41.8%, 0%, 27.8%)
CIE-LAB	lab(47.86, 17.93, -41.63)
CIE-LCH	lch(47.86, 45.33, 293.29°)
OKLab	oklab(55.73% 0.0163 -0.1177)
OKLCH	oklch(55.73% 0.119 277.9)
XYZ	xyz(19.1623, 16.6844, 47.5488)
Luminance	0.1668 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB8 #B8B164

analogous

#6495B8 #646BB8 #8764B8

triadic

#646BB8 #B8646B #6BB864

tetradic

#646BB8 #B86495 #B8B164 #64B887

square

#646BB8 #B86495 #B8B164 #64B887

split-complementary

#646BB8 #B88764 #95B864

monochromatic

#33386F #464D99 #646BB8 #8E93CB #B8BBDE

Accessibility & contrast

On white

4.84

#646BB8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#646BB8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB8

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB8	#FFFFFF	#000000	##FFFFFF
##646BB8	1.00	4.84	4.34	4.84
#FFFFFF	4.84	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E75BB

Deuteranopia (green-blind)

#486EB6

Tritanopia (blue-blind)

#477B88

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #646bb8;
/* rgb */ color: rgb(100, 107, 184);
/* oklch */ color: oklch(55.7% 0.119 277.9);

Tailwind

colors: {
  custom: {
    50: '#9495ce',
    500: '#646bb8',
    950: '#000000',
  },
}

SCSS

$custom: #646bb8;
$custom-light: #9495ce;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb8",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 184
  },
  "hsl": {
    "h": 235,
    "s": 37.168,
    "l": 55.686
  },
  "oklch": {
    "l": 0.55732,
    "c": 0.11879,
    "h": 277.9
  },
  "luminance": 0.16685
}

Semantic roles & 50–950 ramp

primary

#646BB8

secondary

#CDCAAA

accent

#C45BCD

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D13

muted

#7E7E82

Preview Lab

Preview with #646BB8

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

Preview Lab → · Contrast checker → · Palette generator →