#646CCF#646CCF

#646CCF is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.3% C 0.150 H 277.1°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#646CCF
RGB	rgb(100, 108, 207)
HSL	hsl(236, 53%, 60%)
HSV	hsv(236, 52%, 81%)
CMYK	cmyk(51.7%, 47.8%, 0%, 18.8%)
CIE-LAB	lab(49.42, 24.44, -52.38)
CIE-LCH	lch(49.42, 57.80, 295.01°)
OKLab	oklab(57.34% 0.0185 -0.1491)
OKLCH	oklch(57.34% 0.15 277.1)
XYZ	xyz(21.8770, 17.9381, 61.3290)
Luminance	0.1794 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CCF #CFC764

analogous

#64A1CF #646CCF #9164CF

triadic

#646CCF #CF646C #6CCF64

tetradic

#646CCF #CF64A1 #CFC764 #64CF91

square

#646CCF #CF64A1 #CFC764 #64CF91

split-complementary

#646CCF #CF9164 #A1CF64

monochromatic

#2C338D #3A44BC #646CCF #9398DD #C1C5EC

Accessibility & contrast

On white

4.58

#646CCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#646CCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646CCF

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CCF	#FFFFFF	#000000	##000000
##646CCF	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7AD3

Deuteranopia (green-blind)

#3371CD

Tritanopia (blue-blind)

#368293

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #646ccf;
/* rgb */ color: rgb(100, 108, 207);
/* oklch */ color: oklch(57.3% 0.150 277.1);

Tailwind

colors: {
  custom: {
    50: '#9796de',
    500: '#646ccf',
    950: '#000000',
  },
}

SCSS

$custom: #646ccf;
$custom-light: #9796de;
$custom-dark: #000000;

JSON

{
  "hex": "#646ccf",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 207
  },
  "hsl": {
    "h": 235.514,
    "s": 52.709,
    "l": 60.196
  },
  "oklch": {
    "l": 0.5734,
    "c": 0.15029,
    "h": 277.1
  },
  "luminance": 0.17939
}

Semantic roles & 50–950 ramp

primary

#646CCF

secondary

#DCD9B3

accent

#B525C0

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646CCF

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

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