What color is #18445B?

#18445B is a dark cyan-blue. In RGB it is rgb(24, 68, 91), and in HSL hsl(201, 58%, 23%).

Is #18445B accessible as text?

On white, #18445B has a contrast ratio of 10.41:1 (passes WCAG AA for body text); on black it is 2.02:1 (fails). For text placed on #18445B, use white for the best readability.

What is the closest Tailwind color to #18445B?

The nearest Tailwind CSS token is cyan-900 (#104E64).

What colors go well with #18445B?

#18445B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5D3019. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #18445B below.

Is #18445B good for buttons?

#18445B works well for buttons and highlights, but use white text on #18445B — black text only reaches 2.02:1, below the 4.5:1 needed for normal-size labels.

Is #18445B the same as CSS darkslategray?

No — #18445B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#18445B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #18445B

Not just a swatch — here's how #18445B works with other colors. Named schemes with #18445B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #18445B Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Charcoal 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 #18445B Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Charcoal 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 #18445B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3F657B

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

Vintage Leather Lead · 5 colors

Lead #18445B Secondary #6E5216 Surface #E2DCC0 Accent #385245 Anchor #57233D

Charcoal 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 #18445B Secondary #5A6870 Support #969386 Ink #16140F

Charcoal 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 Charcoal carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #18445B 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 32/100

Cool

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

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 61/100

High

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 37/100

Low

A faint retro warmth without tipping into sepia.

Luxury 65/100

High

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

Brand distinctiveness 24/100

Low

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

UI accent fit 49/100

Moderate

Workable accent with care around contrast.

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #18445B

For UI

For branding

For interior

For fashion

People also use #18445B with

Pine Green Navy Espresso Platinum 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 10.4:1. Use

Subtle surface Use #C7DDE8 for cards and hover fills. Tint 80

Avoid beside #192E5D — 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 #18445B 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: #18445B;
  --color-base-rgb: 24 68 91;
  --color-base-oklch: oklch(36.7% 0.062 234.9);
  --color-50: #F2F9FC;
  --color-100: #DEEEF7;
  --color-200: #BFDDEE;
  --color-300: #92C3DD;
  --color-400: #69A7C9;
  --color-500: #478AAD;
  --color-600: #3D6C85;
  --color-700: #304E5F;
  --color-800: #23353E;
  --color-900: #172126;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F2F9FC',
    100: '#DEEEF7',
    200: '#BFDDEE',
    300: '#92C3DD',
    400: '#69A7C9',
    500: '#478AAD',
    600: '#3D6C85',
    700: '#304E5F',
    800: '#23353E',
    900: '#172126',
  },
}

$base: #18445B;
$base-ink: #FFFFFF;
$base-50: #F2F9FC;
$base-100: #DEEEF7;
$base-200: #BFDDEE;
$base-300: #92C3DD;
$base-400: #69A7C9;
$base-500: #478AAD;
$base-600: #3D6C85;
$base-700: #304E5F;
$base-800: #23353E;
$base-900: #172126;
$base-hover: #14374A;
$base-subtle: #AACCDE;

{
    "color": {
        "base": {
            "value": "#18445B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F9FC",
                "type": "color"
            },
            "100": {
                "value": "#DEEEF7",
                "type": "color"
            },
            "200": {
                "value": "#BFDDEE",
                "type": "color"
            },
            "300": {
                "value": "#92C3DD",
                "type": "color"
            },
            "400": {
                "value": "#69A7C9",
                "type": "color"
            },
            "500": {
                "value": "#478AAD",
                "type": "color"
            },
            "600": {
                "value": "#3D6C85",
                "type": "color"
            },
            "700": {
                "value": "#304E5F",
                "type": "color"
            },
            "800": {
                "value": "#23353E",
                "type": "color"
            },
            "900": {
                "value": "#172126",
                "type": "color"
            }
        }
    }
}