#0A183C#0A183C
#0A183C is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.2% C 0.072 H 265.0°. Best body text is #FFFFFF at 17.37:1 contrast (WCAG AA passes).
Color values
| HEX | #0A183C |
|---|---|
| RGB | rgb(10, 24, 60) |
| HSL | hsl(223, 71%, 14%) |
| HSV | hsv(223, 83%, 24%) |
| CMYK | cmyk(83.3%, 60%, 0%, 76.5%) |
| CIE-LAB | lab(9.35, 9.28, -24.97) |
| CIE-LCH | lch(9.35, 26.64, 290.39°) |
| OKLab | oklab(22.19% -0.0063 -0.0718) |
| OKLCH | oklch(22.19% 0.072 265) |
| XYZ | xyz(1.2671, 1.0439, 4.4088) |
| Luminance | 0.0104 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Navy (survey)
#01153E
ΔE00 1.78
Dark Navy Blue
#00022E
ΔE00 4.57
Navy Blue (survey)
#001146
ΔE00 4.61
Dark Navy
#000435
ΔE00 4.74
Midnight
#03012D
ΔE00 4.89
Very Dark Blue
#000133
ΔE00 5.12
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#0A183C #3C2E0A
analogous
#0A313C #0A183C #150A3C
triadic
#0A183C #3C0A18 #183C0A
tetradic
#0A183C #3C0A31 #3C2E0A #0A3C15
square
#0A183C #3C0A31 #3C2E0A #0A3C15
split-complementary
#0A183C #3C150A #313C0A
monochromatic
#040A1A #040A1A #0A183C #132D70 #1B42A5
Accessibility & contrast
On white
17.37
#0A183C on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.21
#0A183C on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #0A183C
17.37:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##0A183C | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##0A183C | 1.00 | 17.37 | 1.21 | 17.37 |
| #FFFFFF | 17.37 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.21 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 17.37 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#031D3D
Deuteranopia (green-blind)
#00183B
Tritanopia (blue-blind)
#002127
Achromatopsia (no color)
#1A1A1A
Design tokens & code
CSS
--color: #0a183c; /* rgb */ color: rgb(10, 24, 60); /* oklch */ color: oklch(22.2% 0.072 265.0);
Tailwind
colors: {
custom: {
50: '#515472',
500: '#0a183c',
950: '#000000',
},
}SCSS
$custom: #0a183c; $custom-light: #515472; $custom-dark: #000000;
JSON
{
"hex": "#0a183c",
"rgb": {
"r": 10,
"g": 24,
"b": 60
},
"hsl": {
"h": 223.2,
"s": 71.429,
"l": 13.725
},
"oklch": {
"l": 0.22186,
"c": 0.07209,
"h": 265
},
"luminance": 0.01044
}Semantic roles & 50–950 ramp
primary
#0A183C
secondary
#796328
accent
#BC3AEE
background
#F4F4F6
surface
#E7E7EC
border
#C3C3C7
text
#020208
muted
#78787B