What color is #13303A?

#13303A is a very dark cyan. In RGB it is rgb(19, 48, 58), and in HSL hsl(195, 51%, 15%).

Is #13303A accessible as text?

On white, #13303A has a contrast ratio of 13.89:1 (passes WCAG AA for body text); on black it is 1.51:1 (fails). For text placed on #13303A, use white for the best readability.

What is the closest Tailwind color to #13303A?

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

What colors go well with #13303A?

#13303A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3A1C13. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #13303A below.

Is #13303A good for buttons?

#13303A works well for buttons and highlights, but use white text on #13303A — black text only reaches 1.51:1, below the 4.5:1 needed for normal-size labels.

Is #13303A the same as CSS darkslategray?

No — #13303A is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#13303A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #13303A

Not just a swatch — here's how #13303A works with other colors. Named schemes with #13303A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #13303A Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1E344A

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 #13303A Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 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 #13303A Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #354F59

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 #13303A Secondary #6F5116 Surface #E2DCC0 Accent #385244 Anchor #56233E

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 #13303A Secondary #485256 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 #13303A 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 38/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 67/100

High

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 27/100

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 15/100

Very low

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

UI accent fit 25/100

Low

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

Surface fit 54/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #13303A

For UI

For branding

For interior

For fashion

People also use #13303A with

Castleton Green Navy Bistre Platinum Dark Slate Gray

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 13.9:1. Use

Subtle surface Use #C4DCE4 for cards and hover fills. Tint 80

Avoid beside #13233A — 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 #13303A 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: #13303A;
  --color-base-rgb: 19 48 58;
  --color-base-oklch: oklch(29.2% 0.039 223.2);
  --color-50: #F3F9FC;
  --color-100: #E0F0F6;
  --color-200: #C1E1EB;
  --color-300: #97C8D9;
  --color-400: #6FAEC3;
  --color-500: #4E91A7;
  --color-600: #417181;
  --color-700: #33525C;
  --color-800: #24373D;
  --color-900: #182226;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F3F9FC',
    100: '#E0F0F6',
    200: '#C1E1EB',
    300: '#97C8D9',
    400: '#6FAEC3',
    500: '#4E91A7',
    600: '#417181',
    700: '#33525C',
    800: '#24373D',
    900: '#182226',
  },
}

$base: #13303A;
$base-ink: #FFFFFF;
$base-50: #F3F9FC;
$base-100: #E0F0F6;
$base-200: #C1E1EB;
$base-300: #97C8D9;
$base-400: #6FAEC3;
$base-500: #4E91A7;
$base-600: #417181;
$base-700: #33525C;
$base-800: #24373D;
$base-900: #182226;
$base-hover: #0F262E;
$base-subtle: #A5CBD7;

{
    "color": {
        "base": {
            "value": "#13303A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F9FC",
                "type": "color"
            },
            "100": {
                "value": "#E0F0F6",
                "type": "color"
            },
            "200": {
                "value": "#C1E1EB",
                "type": "color"
            },
            "300": {
                "value": "#97C8D9",
                "type": "color"
            },
            "400": {
                "value": "#6FAEC3",
                "type": "color"
            },
            "500": {
                "value": "#4E91A7",
                "type": "color"
            },
            "600": {
                "value": "#417181",
                "type": "color"
            },
            "700": {
                "value": "#33525C",
                "type": "color"
            },
            "800": {
                "value": "#24373D",
                "type": "color"
            },
            "900": {
                "value": "#182226",
                "type": "color"
            }
        }
    }
}