#646BB6#646BB6

#646BB6 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.6% C 0.116 H 277.9°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#646BB6
RGB	rgb(100, 107, 182)
HSL	hsl(235, 36%, 55%)
HSV	hsv(235, 45%, 71%)
CMYK	cmyk(45.1%, 41.2%, 0%, 28.6%)
CIE-LAB	lab(47.75, 17.32, -40.64)
CIE-LCH	lch(47.75, 44.18, 293.08°)
OKLab	oklab(55.62% 0.0159 -0.1148)
OKLCH	oklch(55.62% 0.116 277.9)
XYZ	xyz(18.9542, 16.6012, 46.4525)
Luminance	0.1660 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB6 #B6AF64

analogous

#6494B6 #646BB6 #8664B6

triadic

#646BB6 #B6646B #6BB664

tetradic

#646BB6 #B66494 #B6AF64 #64B686

square

#646BB6 #B66494 #B6AF64 #64B686

split-complementary

#646BB6 #B68664 #94B664

monochromatic

#33386C #474D96 #646BB6 #8E93CA #B7BADD

Accessibility & contrast

On white

4.86

#646BB6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#646BB6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB6

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB6	#FFFFFF	#000000	##FFFFFF
##646BB6	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F75B9

Deuteranopia (green-blind)

#496EB4

Tritanopia (blue-blind)

#487A88

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646bb6;
/* rgb */ color: rgb(100, 107, 182);
/* oklch */ color: oklch(55.6% 0.116 277.9);

Tailwind

colors: {
  custom: {
    50: '#9495cc',
    500: '#646bb6',
    950: '#000000',
  },
}

SCSS

$custom: #646bb6;
$custom-light: #9495cc;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb6",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 182
  },
  "hsl": {
    "h": 234.878,
    "s": 35.965,
    "l": 55.294
  },
  "oklch": {
    "l": 0.55616,
    "c": 0.11587,
    "h": 277.9
  },
  "luminance": 0.16602
}

Semantic roles & 50–950 ramp

primary

#646BB6

secondary

#CCC9AA

accent

#C25CCC

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646BB6

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

Preview Lab → · Contrast checker → · Palette generator →