What color is #303243?

#303243 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(48, 50, 67), and in HSL hsl(234, 17%, 23%).

Is #303243 accessible as text?

On white, #303243 has a contrast ratio of 12.63:1 (passes WCAG AA for body text); on black it is 1.66:1 (fails). For text placed on #303243, use white for the best readability.

What is the closest Tailwind color to #303243?

The nearest Tailwind CSS token is slate-800 (#1D293D).

What colors go well with #303243?

As a neutral, #303243 pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #303243 the same as CSS darkslategray?

No — #303243 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#303243 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #303243

Not just a swatch — here's how #303243 works with other colors. Named schemes with #303243 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #303243 Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

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 #303243 Secondary #AEB4B8 Surface #F1F2F0 Support #7E92A7 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.

Vintage Leather Lead · 5 colors

Lead #303243 Secondary #7F4534 Surface #EDD7C2 Accent #365247 Anchor #582238

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.

Luxury Packaging Feature · 5 colors

Feature #303243 Anchor #141210 Accent #DC9758 Secondary #272833 Surface #F3ECE3

Gunmetal Gray carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #303243 Secondary #57585F Support #9D9088 Ink #18140F

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.

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Color Lab

How #303243 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 44/100

Neutral

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 64/100

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 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 12/100

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 55/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 95/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #303243

For UI

For branding

For interior

For fashion

People also use #303243 with

Iron Gray Onyx Taupe Gainsboro

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 12.6:1. Use

Subtle surface Use #D3D4DD for cards and hover fills. Tint 80

Avoid beside #353145 — 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 #303243 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: #303243;
  --color-base-rgb: 48 50 67;
  --color-base-oklch: oklch(32.3% 0.030 279.3);
  --color-50: #F6F6F9;
  --color-100: #E7E8EE;
  --color-200: #CFD1DD;
  --color-300: #ADAFC3;
  --color-400: #8B8EA7;
  --color-500: #6B6E89;
  --color-600: #56586B;
  --color-700: #41424E;
  --color-800: #2C2D35;
  --color-900: #1C1D21;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F6F6F9',
    100: '#E7E8EE',
    200: '#CFD1DD',
    300: '#ADAFC3',
    400: '#8B8EA7',
    500: '#6B6E89',
    600: '#56586B',
    700: '#41424E',
    800: '#2C2D35',
    900: '#1C1D21',
  },
}

$base: #303243;
$base-ink: #FFFFFF;
$base-50: #F6F6F9;
$base-100: #E7E8EE;
$base-200: #CFD1DD;
$base-300: #ADAFC3;
$base-400: #8B8EA7;
$base-500: #6B6E89;
$base-600: #56586B;
$base-700: #41424E;
$base-800: #2C2D35;
$base-900: #1C1D21;
$base-hover: #272937;
$base-subtle: #BCBECC;

{
    "color": {
        "base": {
            "value": "#303243",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F6F9",
                "type": "color"
            },
            "100": {
                "value": "#E7E8EE",
                "type": "color"
            },
            "200": {
                "value": "#CFD1DD",
                "type": "color"
            },
            "300": {
                "value": "#ADAFC3",
                "type": "color"
            },
            "400": {
                "value": "#8B8EA7",
                "type": "color"
            },
            "500": {
                "value": "#6B6E89",
                "type": "color"
            },
            "600": {
                "value": "#56586B",
                "type": "color"
            },
            "700": {
                "value": "#41424E",
                "type": "color"
            },
            "800": {
                "value": "#2C2D35",
                "type": "color"
            },
            "900": {
                "value": "#1C1D21",
                "type": "color"
            }
        }
    }
}