#646DD3#646DD3

#646DD3 is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.8% C 0.155 H 276.6°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#646DD3
RGB	rgb(100, 109, 211)
HSL	hsl(235, 56%, 61%)
HSV	hsv(235, 53%, 83%)
CMYK	cmyk(52.6%, 48.3%, 0%, 17.3%)
CIE-LAB	lab(49.92, 25.08, -53.86)
CIE-LCH	lch(49.92, 59.42, 294.97°)
OKLab	oklab(57.79% 0.0178 -0.1535)
OKLCH	oklch(57.79% 0.155 276.6)
XYZ	xyz(22.4783, 18.3483, 63.9725)
Luminance	0.1835 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DD3 #D3CA64

analogous

#64A4D3 #646DD3 #9264D3

triadic

#646DD3 #D3646D #6DD364

tetradic

#646DD3 #D364A4 #D3CA64 #64D392

square

#646DD3 #D364A4 #D3CA64 #64D392

split-complementary

#646DD3 #D39264 #A4D364

monochromatic

#2A3293 #3743C3 #646DD3 #949AE1 #C3C7EE

Accessibility & contrast

On white

4.50

#646DD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#646DD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646DD3

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DD3	#FFFFFF	#000000	##000000
##646DD3	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)

#3D7BD7

Deuteranopia (green-blind)

#3072D1

Tritanopia (blue-blind)

#328396

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #646dd3;
/* rgb */ color: rgb(100, 109, 211);
/* oklch */ color: oklch(57.8% 0.155 276.6);

Tailwind

colors: {
  custom: {
    50: '#9896e1',
    500: '#646dd3',
    950: '#000000',
  },
}

SCSS

$custom: #646dd3;
$custom-light: #9896e1;
$custom-dark: #000000;

JSON

{
  "hex": "#646dd3",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 211
  },
  "hsl": {
    "h": 235.135,
    "s": 55.779,
    "l": 60.98
  },
  "oklch": {
    "l": 0.57792,
    "c": 0.15453,
    "h": 276.6
  },
  "luminance": 0.1835
}

Semantic roles & 50–950 ramp

primary

#646DD3

secondary

#DEDBB4

accent

#B622C3

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646DD3

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

Preview Lab → · Contrast checker → · Palette generator →