#646DD1#646DD1

#646DD1 is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.7% C 0.152 H 276.7°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#646DD1
RGB	rgb(100, 109, 209)
HSL	hsl(235, 54%, 61%)
HSV	hsv(235, 52%, 82%)
CMYK	cmyk(52.2%, 47.8%, 0%, 18%)
CIE-LAB	lab(49.80, 24.45, -52.91)
CIE-LCH	lch(49.80, 58.29, 294.80°)
OKLab	oklab(57.66% 0.0176 -0.1507)
OKLCH	oklch(57.66% 0.152 276.7)
XYZ	xyz(22.2292, 18.2487, 62.6602)
Luminance	0.1825 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DD1 #D1C864

analogous

#64A3D1 #646DD1 #9164D1

triadic

#646DD1 #D1646D #6DD164

tetradic

#646DD1 #D164A3 #D1C864 #64D191

square

#646DD1 #D164A3 #D1C864 #64D191

split-complementary

#646DD1 #D19164 #A3D164

monochromatic

#2B3390 #3944BF #646DD1 #9399DF #C2C6ED

Accessibility & contrast

On white

4.52

#646DD1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#646DD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #646DD1

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DD1	#FFFFFF	#000000	##000000
##646DD1	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7BD5

Deuteranopia (green-blind)

#3372CF

Tritanopia (blue-blind)

#348395

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #646dd1;
/* rgb */ color: rgb(100, 109, 209);
/* oklch */ color: oklch(57.7% 0.152 276.7);

Tailwind

colors: {
  custom: {
    50: '#9796e0',
    500: '#646dd1',
    950: '#000000',
  },
}

SCSS

$custom: #646dd1;
$custom-light: #9796e0;
$custom-dark: #000000;

JSON

{
  "hex": "#646dd1",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 209
  },
  "hsl": {
    "h": 235.046,
    "s": 54.229,
    "l": 60.588
  },
  "oklch": {
    "l": 0.57663,
    "c": 0.15174,
    "h": 276.7
  },
  "luminance": 0.1825
}

Semantic roles & 50–950 ramp

primary

#646DD1

secondary

#DDDAB4

accent

#B524C2

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #646DD1

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

Preview Lab → · Contrast checker → · Palette generator →