#646EB3#646EB3

#646EB3 is a mid, moderate blue. Relative luminance 0.171; OKLCH L 56.1% C 0.107 H 276.1°. Best body text is #FFFFFF at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#646EB3
RGB	rgb(100, 110, 179)
HSL	hsl(232, 34%, 55%)
HSV	hsv(232, 44%, 70%)
CMYK	cmyk(44.1%, 38.5%, 0%, 29.8%)
CIE-LAB	lab(48.40, 14.57, -37.87)
CIE-LCH	lch(48.40, 40.58, 291.05°)
OKLab	oklab(56.06% 0.0114 -0.1067)
OKLCH	oklch(56.06% 0.107 276.1)
XYZ	xyz(18.9657, 17.1149, 44.9433)
Luminance	0.1712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646EB3 #B3A964

analogous

#6496B3 #646EB3 #8264B3

triadic

#646EB3 #B3646E #6EB364

tetradic

#646EB3 #B36496 #B3A964 #64B382

square

#646EB3 #B36496 #B3A964 #64B382

split-complementary

#646EB3 #B38264 #96B364

monochromatic

#343A69 #485192 #646EB3 #8D94C7 #B6BBDB

Accessibility & contrast

On white

4.75

#646EB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.42

#646EB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646EB3

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646EB3	#FFFFFF	#000000	##FFFFFF
##646EB3	1.00	4.75	4.42	4.75
#FFFFFF	4.75	1.00	21.00	1.00
#000000	4.42	21.00	1.00	21.00
##FFFFFF	4.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5576B6

Deuteranopia (green-blind)

#4F70B1

Tritanopia (blue-blind)

#497C88

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646eb3;
/* rgb */ color: rgb(100, 110, 179);
/* oklch */ color: oklch(56.1% 0.107 276.1);

Tailwind

colors: {
  custom: {
    50: '#9497ca',
    500: '#646eb3',
    950: '#000000',
  },
}

SCSS

$custom: #646eb3;
$custom-light: #9497ca;
$custom-dark: #000000;

JSON

{
  "hex": "#646eb3",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 179
  },
  "hsl": {
    "h": 232.405,
    "s": 34.199,
    "l": 54.706
  },
  "oklch": {
    "l": 0.56064,
    "c": 0.10728,
    "h": 276.1
  },
  "luminance": 0.17116
}

Semantic roles & 50–950 ramp

primary

#646EB3

secondary

#CAC6A9

accent

#BD5ECA

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #646EB3

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

Preview Lab → · Contrast checker → · Palette generator →