What color is #173243?

#173243 is a dark cyan-blue. In RGB it is rgb(23, 50, 67), and in HSL hsl(203, 49%, 18%).

Is #173243 accessible as text?

On white, #173243 has a contrast ratio of 13.34:1 (passes WCAG AA for body text); on black it is 1.57:1 (fails). For text placed on #173243, use white for the best readability.

What is the closest Tailwind color to #173243?

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

What colors go well with #173243?

#173243 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #442917. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #173243 below.

Is #173243 good for buttons?

#173243 works well for buttons and highlights, but use white text on #173243 — black text only reaches 1.57:1, below the 4.5:1 needed for normal-size labels.

Is #173243 the same as CSS darkslategray?

No — #173243 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#173243 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #173243

Not just a swatch — here's how #173243 works with other colors. Named schemes with #173243 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #173243 Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Gunmetal Gray 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 #173243 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Gunmetal Gray 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 #173243 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #395262

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

Vintage Leather Lead · 5 colors

Lead #173243 Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

Gunmetal Gray 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 #173243 Secondary #4C555C Support #969386 Ink #16140F

Gunmetal Gray 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 Gunmetal Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #173243 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 37/100

Cool

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

Softness 31/100

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 29/100

Low

A faint retro warmth without tipping into sepia.

Luxury 69/100

High

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

Brand distinctiveness 17/100

Very low

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

UI accent fit 29/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 52/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 89/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #173243

For UI

For branding

For interior

For fashion

People also use #173243 with

Hunter Green Navy Bistre 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 13.3:1. Use

Subtle surface Use #C6D9E4 for cards and hover fills. Tint 80

Avoid beside #172444 — 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 #173243 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: #173243;
  --color-base-rgb: 23 50 67;
  --color-base-oklch: oklch(30.4% 0.045 238.3);
  --color-50: #F3F8FB;
  --color-100: #E0EDF5;
  --color-200: #C2DBEA;
  --color-300: #98BFD7;
  --color-400: #70A2C2;
  --color-500: #4F84A6;
  --color-600: #42687F;
  --color-700: #344C5B;
  --color-800: #25333C;
  --color-900: #182025;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F3F8FB',
    100: '#E0EDF5',
    200: '#C2DBEA',
    300: '#98BFD7',
    400: '#70A2C2',
    500: '#4F84A6',
    600: '#42687F',
    700: '#344C5B',
    800: '#25333C',
    900: '#182025',
  },
}

$base: #173243;
$base-ink: #FFFFFF;
$base-50: #F3F8FB;
$base-100: #E0EDF5;
$base-200: #C2DBEA;
$base-300: #98BFD7;
$base-400: #70A2C2;
$base-500: #4F84A6;
$base-600: #42687F;
$base-700: #344C5B;
$base-800: #25333C;
$base-900: #182025;
$base-hover: #132937;
$base-subtle: #A9C6D8;

{
    "color": {
        "base": {
            "value": "#173243",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FB",
                "type": "color"
            },
            "100": {
                "value": "#E0EDF5",
                "type": "color"
            },
            "200": {
                "value": "#C2DBEA",
                "type": "color"
            },
            "300": {
                "value": "#98BFD7",
                "type": "color"
            },
            "400": {
                "value": "#70A2C2",
                "type": "color"
            },
            "500": {
                "value": "#4F84A6",
                "type": "color"
            },
            "600": {
                "value": "#42687F",
                "type": "color"
            },
            "700": {
                "value": "#344C5B",
                "type": "color"
            },
            "800": {
                "value": "#25333C",
                "type": "color"
            },
            "900": {
                "value": "#182025",
                "type": "color"
            }
        }
    }
}