#646BB1#646BB1

#646BB1 is a mid, moderate blue. Relative luminance 0.164; OKLCH L 55.3% C 0.109 H 277.9°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#646BB1
RGB	rgb(100, 107, 177)
HSL	hsl(235, 33%, 54%)
HSV	hsv(235, 44%, 69%)
CMYK	cmyk(43.5%, 39.5%, 0%, 30.6%)
CIE-LAB	lab(47.49, 15.81, -38.15)
CIE-LCH	lch(47.49, 41.29, 292.52°)
OKLab	oklab(55.33% 0.0149 -0.1075)
OKLCH	oklch(55.33% 0.109 277.9)
XYZ	xyz(18.4467, 16.3982, 43.7796)
Luminance	0.1640 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646BB1 #B1AA64

analogous

#6492B1 #646BB1 #8464B1

triadic

#646BB1 #B1646B #6BB164

tetradic

#646BB1 #B16492 #B1AA64 #64B184

square

#646BB1 #B16492 #B1AA64 #64B184

split-complementary

#646BB1 #B18464 #92B164

monochromatic

#343867 #484F90 #646BB1 #8D92C5 #B5B9DA

Accessibility & contrast

On white

4.91

#646BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#646BB1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646BB1

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646BB1	#FFFFFF	#000000	##FFFFFF
##646BB1	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5274B4

Deuteranopia (green-blind)

#4C6EAF

Tritanopia (blue-blind)

#4B7985

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #646bb1;
/* rgb */ color: rgb(100, 107, 177);
/* oklch */ color: oklch(55.3% 0.109 277.9);

Tailwind

colors: {
  custom: {
    50: '#9495c8',
    500: '#646bb1',
    950: '#000000',
  },
}

SCSS

$custom: #646bb1;
$custom-light: #9495c8;
$custom-dark: #000000;

JSON

{
  "hex": "#646bb1",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 177
  },
  "hsl": {
    "h": 234.545,
    "s": 33.047,
    "l": 54.314
  },
  "oklch": {
    "l": 0.55331,
    "c": 0.10852,
    "h": 277.9
  },
  "luminance": 0.16399
}

Semantic roles & 50–950 ramp

primary

#646BB1

secondary

#C9C6A8

accent

#BF5FC9

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646BB1

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

Preview Lab → · Contrast checker → · Palette generator →