#283580#283580
#283580 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.5% C 0.127 H 271.3°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).
Color values
| HEX | #283580 |
|---|---|
| RGB | rgb(40, 53, 128) |
| HSL | hsl(231, 52%, 33%) |
| HSV | hsv(231, 69%, 50%) |
| CMYK | cmyk(68.8%, 58.6%, 0%, 49.8%) |
| CIE-LAB | lab(25.43, 20.99, -44.09) |
| CIE-LCH | lch(25.43, 48.83, 295.46°) |
| OKLab | oklab(36.52% 0.0028 -0.1269) |
| OKLCH | oklch(36.52% 0.127 271.3) |
| XYZ | xyz(6.0431, 4.5553, 20.9787) |
| Luminance | 0.0456 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Darkslateblue
#483D8B
ΔE00 5.74
Blueberry
#464196
ΔE00 6.00
Sapphire (survey)
#2138AB
ΔE00 6.45
Marine
#042E60
ΔE00 6.75
Darkish Blue
#014182
ΔE00 7.12
Marine Blue
#01386A
ΔE00 7.16
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#283580 #807328
analogous
#286180 #283580 #472880
triadic
#283580 #802835 #358028
tetradic
#283580 #802861 #807328 #288047
square
#283580 #802861 #807328 #288047
split-complementary
#283580 #804728 #618028
monochromatic
#0B0E23 #192251 #283580 #3748AF #5869CB
Accessibility & contrast
On white
10.99
#283580 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.91
#283580 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #283580
10.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##283580 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##283580 | 1.00 | 10.99 | 1.91 | 10.99 |
| #FFFFFF | 10.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.91 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004083
Deuteranopia (green-blind)
#00387E
Tritanopia (blue-blind)
#004755
Achromatopsia (no color)
#3C3C3C
Design tokens & code
CSS
--color: #283580; /* rgb */ color: rgb(40, 53, 128); /* oklch */ color: oklch(36.5% 0.127 271.3);
Tailwind
colors: {
custom: {
50: '#6d6ca5',
500: '#283580',
950: '#000000',
},
}SCSS
$custom: #283580; $custom-light: #6d6ca5; $custom-dark: #000000;
JSON
{
"hex": "#283580",
"rgb": {
"r": 40,
"g": 53,
"b": 128
},
"hsl": {
"h": 231.136,
"s": 52.381,
"l": 32.941
},
"oklch": {
"l": 0.36524,
"c": 0.12689,
"h": 271.3
},
"luminance": 0.04556
}Semantic roles & 50–950 ramp
primary
#283580
secondary
#B0A254
accent
#C74CDC
background
#F6F6FA
surface
#ECEBF4
border
#C7C6CE
text
#08060F
muted
#7A7A7F