#284E8B#284E8B
#284E8B is a dark, moderate blue. Relative luminance 0.078; OKLCH L 42.9% C 0.110 H 259.5°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).
Color values
| HEX | #284E8B |
|---|---|
| RGB | rgb(40, 78, 139) |
| HSL | hsl(217, 55%, 35%) |
| HSV | hsv(217, 71%, 55%) |
| CMYK | cmyk(71.2%, 43.9%, 0%, 45.5%) |
| CIE-LAB | lab(33.48, 8.16, -37.94) |
| CIE-LCH | lch(33.48, 38.80, 282.14°) |
| OKLab | oklab(42.91% -0.0202 -0.1084) |
| OKLCH | oklch(42.91% 0.11 259.5) |
| XYZ | xyz(8.2580, 7.7631, 25.4843) |
| Luminance | 0.0776 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Dusk Blue
#26538D
ΔE00 2.04
Cobalt (survey)
#1E488F
ΔE00 2.11
Light Navy
#155084
ΔE00 3.61
Denim Blue
#3B5B92
ΔE00 4.47
Twilight Blue
#0A437A
ΔE00 4.50
Darkish Blue
#014182
ΔE00 4.53
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#284E8B #8B6528
analogous
#287F8B #284E8B #34288B
triadic
#284E8B #8B284E #4E8B28
tetradic
#284E8B #8B287F #8B6528 #288B34
square
#284E8B #8B287F #8B6528 #288B34
split-complementary
#284E8B #8B3428 #7F8B28
monochromatic
#0D192C #1A335B #284E8B #3669BB #5D89D0
Accessibility & contrast
On white
8.23
#284E8B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.55
#284E8B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #284E8B
8.23:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##284E8B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##284E8B | 1.00 | 8.23 | 2.55 | 8.23 |
| #FFFFFF | 8.23 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.55 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.23 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#31548D
Deuteranopia (green-blind)
#204B8A
Tritanopia (blue-blind)
#005C65
Achromatopsia (no color)
#4F4F4F
Design tokens & code
CSS
--color: #284e8b; /* rgb */ color: rgb(40, 78, 139); /* oklch */ color: oklch(42.9% 0.110 259.5);
Tailwind
colors: {
custom: {
50: '#6e7fad',
500: '#284e8b',
950: '#000000',
},
}SCSS
$custom: #284e8b; $custom-light: #6e7fad; $custom-dark: #000000;
JSON
{
"hex": "#284e8b",
"rgb": {
"r": 40,
"g": 78,
"b": 139
},
"hsl": {
"h": 216.97,
"s": 55.307,
"l": 35.098
},
"oklch": {
"l": 0.42905,
"c": 0.11023,
"h": 259.5
},
"luminance": 0.07764
}Semantic roles & 50–950 ramp
primary
#284E8B
secondary
#B69259
accent
#A549DF
background
#F7F7FA
surface
#EDEEF4
border
#C8C9CE
text
#080A10
muted
#7B7C7F