HSL(231, 81%, 9%)
Very Dark Blue — Blue color
Adjust Color
Color Information
Color Name
Very Dark Blue
Color Family
Blue
Warm / Cool
🔵 Cool
Temperature
9000K
CSS Class
bg-[hsl(231,81%,9%)]
Color Conversions
| Format | Value | CSS Usage | |
|---|---|---|---|
| HSL | hsl(231, 81%, 9%) | color: hsl(231, 81%, 9%) | |
| HEX | #040A2A | color: #040A2A | |
| RGB | rgb(4, 10, 42) | color: rgb(4, 10, 42) | |
| CMYK | cmyk(90%, 76%, 0%, 84%) | — | |
| HSV | hsv(231, 90%, 16%) | — | |
| HWB | hwb(231 2% 84%) | color: hwb(231 2% 84%) | |
| OKLCH | oklch(0.1643 0.0659 267.89) | color: oklch(0.1643 0.0659 267.89) | |
| Lab | lab(3.7 7.65 -20.82) | color: lab(3.7 7.65 -20.82) | |
| LCH | lch(3.7 22.18 290.18) | color: lch(3.7 22.18 290.18) |
Color Theory
Accessibility (WCAG)
White text on color
Black text on color
Colored text
Contrast Ratios
AA Normal (4.5:1)
AA Large (3:1)
AAA Normal (7:1)
Best text on this color: white
Color Blindness Simulation
Protanopia (Red-blind)
#070722 — rgb(7, 7, 34)
Deuteranopia (Green-blind)
#060620 — rgb(6, 6, 32)
Tritanopia (Blue-blind)
#041C1B — rgb(4, 28, 27)
Tints & Shades
CSS Code Snippets
background
background-color: hsl(231, 81%, 9%);
text
color: hsl(231, 81%, 9%);
border
border: 2px solid hsl(231, 81%, 9%);
gradient light
background: linear-gradient(to right, hsl(231, 81%, 29%), hsl(231, 81%, 9%));
gradient dark
background: linear-gradient(to right, hsl(231, 81%, 9%), hsl(231, 81%, 0%))
hex
background-color: #040A2A;
tailwind
bg-[hsl(231,81%,9%)]
box shadow
box-shadow: 0 4px 6px -1px hsl(231, 81%, 9%, 0.4);
css variable
--color-primary: hsl(231, 81%, 9%);
Related Colors
Use Cases for Very Dark Blue
Frequently Asked Questions
What are all the color codes for HSL(231, 81%, 9%)?
HEX: #040A2A | RGB: rgb(4, 10, 42) | CMYK: 90%, 76%, 0%, 84% | HSV: 231°, 90%, 16%. Copy any format from the conversion table above.
What colors go well with #040A2A?
The complementary color is HSL(51, 81%, 9%). For a triadic harmony, use hues 231°, 351°, and 111°. For analogous combinations, try hues 201° and 261°. See the Color Harmony section above for complete palettes with previews.
How do I use HSL(231, 81%, 9%) in CSS?
As HSL: color: hsl(231, 81%, 9%); — As HEX: color: #040A2A; — As RGB: color: rgb(4, 10, 42); — Tailwind CSS: bg-[hsl(231,81%,9%)] — CSS variable: --color-primary: hsl(231, 81%, 9%);