#646BDF#646BDF

#646BDF is a mid, vivid blue. Relative luminance 0.186; OKLCH L 58.2% C 0.174 H 277.0°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#646BDF
RGB	rgb(100, 107, 223)
HSL	hsl(237, 66%, 63%)
HSV	hsv(237, 55%, 87%)
CMYK	cmyk(55.2%, 52%, 0%, 12.5%)
CIE-LAB	lab(50.16, 30.11, -60.28)
CIE-LCH	lch(50.16, 67.38, 296.55°)
OKLab	oklab(58.21% 0.021 -0.1724)
OKLCH	oklch(58.21% 0.174 277)
XYZ	xyz(23.8283, 18.5508, 72.1228)
Luminance	0.1855 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BDF #DFD864

analogous

#64A8DF #646BDF #9A64DF

triadic

#646BDF #DF646B #6BDF64

tetradic

#646BDF #DF64A8 #DFD864 #64DF9A

square

#646BDF #DF64A8 #DFD864 #64DF9A

split-complementary

#646BDF #DF9A64 #A8DF64

monochromatic

#222AA6 #313BD5 #646BDF #979BE9 #C9CCF4

Accessibility & contrast

On white

4.46

#646BDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#646BDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646BDF

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BDF	#FFFFFF	#000000	##000000
##646BDF	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A7DE3

Deuteranopia (green-blind)

#1072DD

Tritanopia (blue-blind)

#23859B

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646bdf;
/* rgb */ color: rgb(100, 107, 223);
/* oklch */ color: oklch(58.2% 0.174 277.0);

Tailwind

colors: {
  custom: {
    50: '#9995ea',
    500: '#646bdf',
    950: '#000000',
  },
}

SCSS

$custom: #646bdf;
$custom-light: #9995ea;
$custom-dark: #000000;

JSON

{
  "hex": "#646bdf",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 223
  },
  "hsl": {
    "h": 236.585,
    "s": 65.775,
    "l": 63.333
  },
  "oklch": {
    "l": 0.58213,
    "c": 0.17366,
    "h": 277
  },
  "luminance": 0.18552
}

Semantic roles & 50–950 ramp

primary

#646BDF

secondary

#E5E3B9

accent

#C318CE

background

#FAF9FE

surface

#F3F1FD

border

#CDCBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #646BDF

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

Preview Lab → · Contrast checker → · Palette generator →