#646BDB#646BDB

#646BDB is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.9% C 0.168 H 277.1°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#646BDB
RGB	rgb(100, 107, 219)
HSL	hsl(236, 62%, 63%)
HSV	hsv(236, 54%, 86%)
CMYK	cmyk(54.3%, 51.1%, 0%, 14.1%)
CIE-LAB	lab(49.90, 28.84, -58.42)
CIE-LCH	lch(49.90, 65.15, 296.27°)
OKLab	oklab(57.94% 0.0208 -0.1669)
OKLCH	oklch(57.94% 0.168 277.1)
XYZ	xyz(23.2953, 18.3376, 69.3161)
Luminance	0.1834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BDB #DBD464

analogous

#64A6DB #646BDB #9964DB

triadic

#646BDB #DB646B #6BDB64

tetradic

#646BDB #DB64A6 #DBD464 #64DB99

square

#646BDB #DB64A6 #DBD464 #64DB99

split-complementary

#646BDB #DB9964 #A6DB64

monochromatic

#252CA0 #323CCF #646BDB #969AE7 #C7CAF2

Accessibility & contrast

On white

4.50

#646BDB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#646BDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646BDB

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BDB	#FFFFFF	#000000	##000000
##646BDB	1.00	4.50	4.67	4.67
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#307CDF

Deuteranopia (green-blind)

#1C72D9

Tritanopia (blue-blind)

#298499

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646bdb;
/* rgb */ color: rgb(100, 107, 219);
/* oklch */ color: oklch(57.9% 0.168 277.1);

Tailwind

colors: {
  custom: {
    50: '#9995e7',
    500: '#646bdb',
    950: '#000000',
  },
}

SCSS

$custom: #646bdb;
$custom-light: #9995e7;
$custom-dark: #000000;

JSON

{
  "hex": "#646bdb",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 219
  },
  "hsl": {
    "h": 236.471,
    "s": 62.304,
    "l": 62.549
  },
  "oklch": {
    "l": 0.5794,
    "c": 0.16821,
    "h": 277.1
  },
  "luminance": 0.18339
}

Semantic roles & 50–950 ramp

primary

#646BDB

secondary

#E3E0B8

accent

#C01BCA

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #646BDB

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

Preview Lab → · Contrast checker → · Palette generator →