HSL(231, 40%, 16%)

Blue — Blue color

Adjust Color

Color Information

Color Name

Blue

Color Family

Blue

Warm / Cool

🔵 Cool

Temperature

9000K

CSS Class

bg-[hsl(231,40%,16%)]

Color Conversions

Format Value CSS Usage
HSL hsl(231, 40%, 16%) color: hsl(231, 40%, 16%)
HEX #181D39 color: #181D39
RGB rgb(24, 29, 57) color: rgb(24, 29, 57)
CMYK cmyk(58%, 49%, 0%, 78%) —
HSV hsv(231, 58%, 22%) —
HWB hwb(231 9% 78%) color: hwb(231 9% 78%)
OKLCH oklch(0.2419 0.0538 274.06) color: oklch(0.2419 0.0538 274.06)
Lab lab(11.74 7.32 -18.94) color: lab(11.74 7.32 -18.94)
LCH lch(11.74 20.31 291.13) color: lch(11.74 20.31 291.13)

Color Theory

Complementary

Triadic

Analogous

Tetradic (Square)

Split-Complementary

Accessibility (WCAG)

White text on color

Black text on color

Color on white bg

Colored text

Contrast Ratios

vs White 16.49:1
vs Black 1.27:1

AA Normal (4.5:1)

on White: PASS ✓ on Black: FAIL ✗

AA Large (3:1)

on White: PASS ✓ on Black: FAIL ✗

AAA Normal (7:1)

on White: PASS ✓

Best text on this color: white

Color Blindness Simulation

Protanopia (Red-blind)

#1A1A32 — rgb(26, 26, 50)

Deuteranopia (Green-blind)

#1A1A31 — rgb(26, 26, 49)

Tritanopia (Blue-blind)

#182D2C — rgb(24, 45, 44)

Tints & Shades

Tints (Lighter →)

← Shades (Darker)

Saturation (0% → 100%)

CSS Code Snippets

background

background-color: hsl(231, 40%, 16%);

text

color: hsl(231, 40%, 16%);

border

border: 2px solid hsl(231, 40%, 16%);

gradient light

background: linear-gradient(to right, hsl(231, 40%, 36%), hsl(231, 40%, 16%));

gradient dark

background: linear-gradient(to right, hsl(231, 40%, 16%), hsl(231, 40%, 0%))

hex

background-color: #181D39;

tailwind

bg-[hsl(231,40%,16%)]

box shadow

box-shadow: 0 4px 6px -1px hsl(231, 40%, 16%, 0.4);

css variable

--color-primary: hsl(231, 40%, 16%);

Related Colors

#212331

231,20,16

#101841

231,60,16

#000000

231,40,0

#374281

231,40,36

#182639

216,40,16

#182339

221,40,16

#191839

241,40,16

#1C1839

246,40,16

Use Cases for Blue

Corporate branding Trust signals Tech products Social media Primary buttons

Frequently Asked Questions

What are all the color codes for HSL(231, 40%, 16%)?

HEX: #181D39 | RGB: rgb(24, 29, 57) | CMYK: 58%, 49%, 0%, 78% | HSV: 231°, 58%, 22%. Copy any format from the conversion table above.

What colors go well with #181D39?

The complementary color is HSL(51, 40%, 16%). 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, 40%, 16%) in CSS?

As HSL: color: hsl(231, 40%, 16%); — As HEX: color: #181D39; — As RGB: color: rgb(24, 29, 57); — Tailwind CSS: bg-[hsl(231,40%,16%)] — CSS variable: --color-primary: hsl(231, 40%, 16%);