#646BCF#646BCF

#646BCF is a mid, vivid blue. Relative luminance 0.177; OKLCH L 57.1% C 0.152 H 277.4°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#646BCF
RGB	rgb(100, 107, 207)
HSL	hsl(236, 53%, 60%)
HSV	hsv(236, 52%, 81%)
CMYK	cmyk(51.7%, 48.3%, 0%, 18.8%)
CIE-LAB	lab(49.16, 25.05, -52.79)
CIE-LCH	lch(49.16, 58.43, 295.39°)
OKLab	oklab(57.15% 0.0196 -0.1504)
OKLCH	oklch(57.15% 0.152 277.4)
XYZ	xyz(21.7722, 17.7284, 61.2940)
Luminance	0.1773 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BCF #CFC864

analogous

#64A0CF #646BCF #9364CF

triadic

#646BCF #CF646B #6BCF64

tetradic

#646BCF #CF64A0 #CFC864 #64CF93

square

#646BCF #CF64A0 #CFC864 #64CF93

split-complementary

#646BCF #CF9364 #A0CF64

monochromatic

#2C328D #3A43BC #646BCF #9398DD #C1C4EC

Accessibility & contrast

On white

4.62

#646BCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#646BCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #646BCF

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BCF	#FFFFFF	#000000	##FFFFFF
##646BCF	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D79D3

Deuteranopia (green-blind)

#3171CD

Tritanopia (blue-blind)

#368193

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #646bcf;
/* rgb */ color: rgb(100, 107, 207);
/* oklch */ color: oklch(57.1% 0.152 277.4);

Tailwind

colors: {
  custom: {
    50: '#9795de',
    500: '#646bcf',
    950: '#000000',
  },
}

SCSS

$custom: #646bcf;
$custom-light: #9795de;
$custom-dark: #000000;

JSON

{
  "hex": "#646bcf",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 207
  },
  "hsl": {
    "h": 236.075,
    "s": 52.709,
    "l": 60.196
  },
  "oklch": {
    "l": 0.57146,
    "c": 0.15164,
    "h": 277.4
  },
  "luminance": 0.1773
}

Semantic roles & 50–950 ramp

primary

#646BCF

secondary

#DCD9B3

accent

#B625C0

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646BCF

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

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