What color is #183448?

#183448 is a dark cyan-blue. In RGB it is rgb(24, 52, 72), and in HSL hsl(205, 50%, 19%).

Is #183448 accessible as text?

On white, #183448 has a contrast ratio of 12.93:1 (passes WCAG AA for body text); on black it is 1.62:1 (fails). For text placed on #183448, use white for the best readability.

What is the closest Tailwind color to #183448?

The nearest Tailwind CSS token is cyan-950 (#053345).

What colors go well with #183448?

#183448 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #492C18. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #183448 below.

Is #183448 good for buttons?

#183448 works well for buttons and highlights, but use white text on #183448 — black text only reaches 1.62:1, below the 4.5:1 needed for normal-size labels.

Is #183448 the same as CSS darkslategray?

No — #183448 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#183448 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #183448

Not just a swatch — here's how #183448 works with other colors. Named schemes with #183448 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #183448 Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Prussian Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #183448 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Prussian Blue keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #183448 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3A5467

Prussian Blue is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Prussian Blue.

Vintage Leather Lead · 5 colors

Lead #183448 Secondary #7F4439 Surface #E2DDC0 Accent #375245 Anchor #57233C

Prussian Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #183448 Secondary #4E585F Support #969386 Ink #16140F

Prussian Blue is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #183448 actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 36/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 32/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 19/100

Very low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 32/100

Low

Workable accent with care around contrast.

Surface fit 50/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #183448

For UI

For branding

For interior

For fashion

People also use #183448 with

Feldgrau Navy Bistre Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 12.9:1. Use

Subtle surface Use #C7D8E5 for cards and hover fills. Tint 80

Avoid beside #182449 — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #183448 at work across the surfaces designers actually ship.

Website / UI

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #183448;
  --color-base-rgb: 24 52 72;
  --color-base-oklch: oklch(31.3% 0.050 241.8);
  --color-50: #F3F8FC;
  --color-100: #E0ECF5;
  --color-200: #C2DAEB;
  --color-300: #97BDD8;
  --color-400: #70A0C2;
  --color-500: #4E82A6;
  --color-600: #426680;
  --color-700: #334B5C;
  --color-800: #24323C;
  --color-900: #182025;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F3F8FC',
    100: '#E0ECF5',
    200: '#C2DAEB',
    300: '#97BDD8',
    400: '#70A0C2',
    500: '#4E82A6',
    600: '#426680',
    700: '#334B5C',
    800: '#24323C',
    900: '#182025',
  },
}

$base: #183448;
$base-ink: #FFFFFF;
$base-50: #F3F8FC;
$base-100: #E0ECF5;
$base-200: #C2DAEB;
$base-300: #97BDD8;
$base-400: #70A0C2;
$base-500: #4E82A6;
$base-600: #426680;
$base-700: #334B5C;
$base-800: #24323C;
$base-900: #182025;
$base-hover: #132A3A;
$base-subtle: #A9C5D9;

{
    "color": {
        "base": {
            "value": "#183448",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FC",
                "type": "color"
            },
            "100": {
                "value": "#E0ECF5",
                "type": "color"
            },
            "200": {
                "value": "#C2DAEB",
                "type": "color"
            },
            "300": {
                "value": "#97BDD8",
                "type": "color"
            },
            "400": {
                "value": "#70A0C2",
                "type": "color"
            },
            "500": {
                "value": "#4E82A6",
                "type": "color"
            },
            "600": {
                "value": "#426680",
                "type": "color"
            },
            "700": {
                "value": "#334B5C",
                "type": "color"
            },
            "800": {
                "value": "#24323C",
                "type": "color"
            },
            "900": {
                "value": "#182025",
                "type": "color"
            }
        }
    }
}