What color is #263A3D?

#263A3D is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(38, 58, 61), and in HSL hsl(188, 23%, 19%).

Is #263A3D accessible as text?

On white, #263A3D has a contrast ratio of 11.97:1 (passes WCAG AA for body text); on black it is 1.76:1 (fails). For text placed on #263A3D, use white for the best readability.

What is the closest Tailwind color to #263A3D?

The nearest Tailwind CSS token is zinc-700 (#3F3F46).

What colors go well with #263A3D?

As a neutral, #263A3D 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 #263A3D the same as CSS darkslategray?

No — #263A3D 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.

#263A3D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #263A3D

Not just a swatch — here's how #263A3D works with other colors. Named schemes with #263A3D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #263A3D Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1D3549

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 #263A3D Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 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 #263A3D Surface #14161A Highlight #F4F6F8 Secondary #596671 Accent #475A5D

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 #263A3D Secondary #715117 Surface #E3DCC0 Accent #395143 Anchor #56233F

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 #263A3D Secondary #565D5E Support #979286 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.

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Color Lab

How #263A3D 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 43/100

Neutral

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

High

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

Naturalness 2/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 27/100

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 10/100

Very low

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

UI accent fit 30/100

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 93/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #263A3D

For UI

For branding

For interior

For fashion

People also use #263A3D with

Dark Slate Gray Gunmetal Gray Bistre Platinum

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 12.0:1. Use

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

Avoid beside #25313C — 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 #263A3D 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: #263A3D;
  --color-base-rgb: 38 58 61;
  --color-base-oklch: oklch(33.3% 0.026 207.7);
  --color-50: #F5F9F9;
  --color-100: #E6EEF0;
  --color-200: #CDDDE0;
  --color-300: #A9C2C6;
  --color-400: #86A7AC;
  --color-500: #66898F;
  --color-600: #536B6F;
  --color-700: #3E4E51;
  --color-800: #2B3536;
  --color-900: #1B2122;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F5F9F9',
    100: '#E6EEF0',
    200: '#CDDDE0',
    300: '#A9C2C6',
    400: '#86A7AC',
    500: '#66898F',
    600: '#536B6F',
    700: '#3E4E51',
    800: '#2B3536',
    900: '#1B2122',
  },
}

$base: #263A3D;
$base-ink: #FFFFFF;
$base-50: #F5F9F9;
$base-100: #E6EEF0;
$base-200: #CDDDE0;
$base-300: #A9C2C6;
$base-400: #86A7AC;
$base-500: #66898F;
$base-600: #536B6F;
$base-700: #3E4E51;
$base-800: #2B3536;
$base-900: #1B2122;
$base-hover: #1E2D30;
$base-subtle: #B6C9CC;

{
    "color": {
        "base": {
            "value": "#263A3D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F9F9",
                "type": "color"
            },
            "100": {
                "value": "#E6EEF0",
                "type": "color"
            },
            "200": {
                "value": "#CDDDE0",
                "type": "color"
            },
            "300": {
                "value": "#A9C2C6",
                "type": "color"
            },
            "400": {
                "value": "#86A7AC",
                "type": "color"
            },
            "500": {
                "value": "#66898F",
                "type": "color"
            },
            "600": {
                "value": "#536B6F",
                "type": "color"
            },
            "700": {
                "value": "#3E4E51",
                "type": "color"
            },
            "800": {
                "value": "#2B3536",
                "type": "color"
            },
            "900": {
                "value": "#1B2122",
                "type": "color"
            }
        }
    }
}