#646EB5#646EB5

#646EB5 is a mid, moderate blue. Relative luminance 0.172; OKLCH L 56.2% C 0.110 H 276.2°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#646EB5
RGB	rgb(100, 110, 181)
HSL	hsl(233, 35%, 55%)
HSV	hsv(233, 45%, 71%)
CMYK	cmyk(44.8%, 39.2%, 0%, 29%)
CIE-LAB	lab(48.51, 15.17, -38.87)
CIE-LCH	lch(48.51, 41.73, 291.32°)
OKLab	oklab(56.18% 0.0119 -0.1096)
OKLCH	oklch(56.18% 0.11 276.2)
XYZ	xyz(19.1694, 17.1964, 46.0163)
Luminance	0.1720 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646EB5 #B5AB64

analogous

#6496B5 #646EB5 #8364B5

triadic

#646EB5 #B5646E #6EB564

tetradic

#646EB5 #B56496 #B5AB64 #64B583

square

#646EB5 #B56496 #B5AB64 #64B583

split-complementary

#646EB5 #B58364 #96B564

monochromatic

#333A6B #475195 #646EB5 #8D95C9 #B7BCDD

Accessibility & contrast

On white

4.73

#646EB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#646EB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646EB5

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646EB5	#FFFFFF	#000000	##FFFFFF
##646EB5	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5477B8

Deuteranopia (green-blind)

#4E70B3

Tritanopia (blue-blind)

#487D89

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646eb5;
/* rgb */ color: rgb(100, 110, 181);
/* oklch */ color: oklch(56.2% 0.110 276.2);

Tailwind

colors: {
  custom: {
    50: '#9497cb',
    500: '#646eb5',
    950: '#000000',
  },
}

SCSS

$custom: #646eb5;
$custom-light: #9497cb;
$custom-dark: #000000;

JSON

{
  "hex": "#646eb5",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 181
  },
  "hsl": {
    "h": 232.593,
    "s": 35.371,
    "l": 55.098
  },
  "oklch": {
    "l": 0.56176,
    "c": 0.11023,
    "h": 276.2
  },
  "luminance": 0.17197
}

Semantic roles & 50–950 ramp

primary

#646EB5

secondary

#CBC7A9

accent

#BE5CCB

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646EB5

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

Preview Lab → · Contrast checker → · Palette generator →