#646BB5#646BB5

#646BB5 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.6% C 0.114 H 277.9°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#646BB5
RGB	rgb(100, 107, 181)
HSL	hsl(235, 35%, 55%)
HSV	hsv(235, 45%, 71%)
CMYK	cmyk(44.8%, 40.9%, 0%, 29%)
CIE-LAB	lab(47.70, 17.02, -40.14)
CIE-LCH	lch(47.70, 43.60, 292.97°)
OKLab	oklab(55.56% 0.0157 -0.1133)
OKLCH	oklch(55.56% 0.114 277.9)
XYZ	xyz(18.8512, 16.5600, 45.9102)
Luminance	0.1656 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB5 #B5AE64

analogous

#6493B5 #646BB5 #8664B5

triadic

#646BB5 #B5646B #6BB564

tetradic

#646BB5 #B56493 #B5AE64 #64B586

square

#646BB5 #B56493 #B5AE64 #64B586

split-complementary

#646BB5 #B58664 #93B564

monochromatic

#33386B #474E95 #646BB5 #8D93C9 #B7BADD

Accessibility & contrast

On white

4.87

#646BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#646BB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB5

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB5	#FFFFFF	#000000	##FFFFFF
##646BB5	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5074B8

Deuteranopia (green-blind)

#4A6EB3

Tritanopia (blue-blind)

#497A87

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646bb5;
/* rgb */ color: rgb(100, 107, 181);
/* oklch */ color: oklch(55.6% 0.114 277.9);

Tailwind

colors: {
  custom: {
    50: '#9495cb',
    500: '#646bb5',
    950: '#000000',
  },
}

SCSS

$custom: #646bb5;
$custom-light: #9495cb;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb5",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 181
  },
  "hsl": {
    "h": 234.815,
    "s": 35.371,
    "l": 55.098
  },
  "oklch": {
    "l": 0.55558,
    "c": 0.1144,
    "h": 277.9
  },
  "luminance": 0.16561
}

Semantic roles & 50–950 ramp

primary

#646BB5

secondary

#CBC8A9

accent

#C25CCB

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646BB5

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

Preview Lab → · Contrast checker → · Palette generator →