#645ECB#645ECB
#645ECB is a mid, vivid blue. Relative luminance 0.150; OKLCH L 54.4% C 0.164 H 282.0°. Best body text is #FFFFFF at 5.24:1 contrast (WCAG AA passes).
Color values
| HEX | #645ECB |
|---|---|
| RGB | rgb(100, 94, 203) |
| HSL | hsl(243, 51%, 58%) |
| HSV | hsv(243, 54%, 80%) |
| CMYK | cmyk(50.7%, 53.7%, 0%, 20.4%) |
| CIE-LAB | lab(45.67, 31.75, -56.11) |
| CIE-LCH | lch(45.67, 64.47, 299.50°) |
| OKLab | oklab(54.44% 0.034 -0.1602) |
| OKLCH | oklch(54.44% 0.164 282) |
| XYZ | xyz(20.0344, 15.0254, 58.3329) |
| Luminance | 0.1503 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Dark Periwinkle
#665FD1
ΔE00 0.99
Slate Blue
#6A5ACD
ΔE00 1.85
Iris
#6258C4
ΔE00 2.15
Light Indigo
#6D5ACF
ΔE00 2.32
Warm Blue
#4B57DB
ΔE00 4.48
Mediumslateblue
#7B68EE
ΔE00 7.15
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#645ECB #C5CB5E
analogous
#5E8ECB #645ECB #9A5ECB
triadic
#645ECB #CB645E #5ECB64
tetradic
#645ECB #CB5E8E #C5CB5E #5ECB9A
square
#645ECB #CB5E8E #C5CB5E #5ECB9A
split-complementary
#645ECB #CB9A5E #8ECB5E
monochromatic
#302B84 #403AB2 #645ECB #918CDA #BDBBE9
Accessibility & contrast
On white
5.24
#645ECB on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
4.01
#645ECB on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #645ECB
5.24:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##645ECB | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##645ECB | 1.00 | 5.24 | 4.01 | 5.24 |
| #FFFFFF | 5.24 | 1.00 | 21.00 | 1.00 |
| #000000 | 4.01 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.24 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2170CF
Deuteranopia (green-blind)
#1468C9
Tritanopia (blue-blind)
#3C768B
Achromatopsia (no color)
#6C6C6C
Design tokens & code
CSS
--color: #645ecb; /* rgb */ color: rgb(100, 94, 203); /* oklch */ color: oklch(54.4% 0.164 282.0);
Tailwind
colors: {
custom: {
50: '#978cdb',
500: '#645ecb',
950: '#000000',
},
}SCSS
$custom: #645ecb; $custom-light: #978cdb; $custom-dark: #000000;
JSON
{
"hex": "#645ecb",
"rgb": {
"r": 100,
"g": 94,
"b": 203
},
"hsl": {
"h": 243.303,
"s": 51.174,
"l": 58.235
},
"oklch": {
"l": 0.54441,
"c": 0.16379,
"h": 282
},
"luminance": 0.15027
}Semantic roles & 50–950 ramp
primary
#645ECB
secondary
#D6D8AD
accent
#DB4DD3
background
#F9F8FD
surface
#F2F0FB
border
#CCCBD4
text
#0E0C15
muted
#7E7D83