#645BB5#645BB5

#645BB5 is a mid, vivid blue. Relative luminance 0.135; OKLCH L 52.4% C 0.138 H 285.2°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#645BB5
RGB	rgb(100, 91, 181)
HSL	hsl(246, 38%, 53%)
HSV	hsv(246, 50%, 71%)
CMYK	cmyk(44.8%, 49.7%, 0%, 29%)
CIE-LAB	lab(43.55, 26.88, -46.75)
CIE-LCH	lch(43.55, 53.93, 299.90°)
OKLab	oklab(52.41% 0.036 -0.1327)
OKLCH	oklch(52.41% 0.138 285.2)
XYZ	xyz(17.3347, 13.5270, 45.4047)
Luminance	0.1353 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645BB5 #ACB55B

analogous

#5B7FB5 #645BB5 #915BB5

triadic

#645BB5 #B5645B #5BB564

tetradic

#645BB5 #B55B7F #ACB55B #5BB591

square

#645BB5 #B55B7F #ACB55B #5BB591

split-complementary

#645BB5 #B5915B #7FB55B

monochromatic

#342F67 #4A4291 #645BB5 #8C85C8 #B4AFDB

Accessibility & contrast

On white

5.67

#645BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#645BB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645BB5

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645BB5	#FFFFFF	#000000	##FFFFFF
##645BB5	1.00	5.67	3.71	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#346AB8

Deuteranopia (green-blind)

#3264B3

Tritanopia (blue-blind)

#4A6E7F

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #645bb5;
/* rgb */ color: rgb(100, 91, 181);
/* oklch */ color: oklch(52.4% 0.138 285.2);

Tailwind

colors: {
  custom: {
    50: '#9589cc',
    500: '#645bb5',
    950: '#000000',
  },
}

SCSS

$custom: #645bb5;
$custom-light: #9589cc;
$custom-dark: #000000;

JSON

{
  "hex": "#645bb5",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 181
  },
  "hsl": {
    "h": 246,
    "s": 37.815,
    "l": 53.333
  },
  "oklch": {
    "l": 0.52409,
    "c": 0.13753,
    "h": 285.2
  },
  "luminance": 0.13528
}

Semantic roles & 50–950 ramp

primary

#645BB5

secondary

#C5C9A3

accent

#CE5AC2

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #645BB5

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

Preview Lab → · Contrast checker → · Palette generator →