What color is #263B39?

#263B39 is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(38, 59, 57), and in HSL hsl(174, 22%, 19%).

Is #263B39 accessible as text?

On white, #263B39 has a contrast ratio of 11.88:1 (passes WCAG AA for body text); on black it is 1.77:1 (fails). For text placed on #263B39, use white for the best readability.

What is the closest Tailwind color to #263B39?

The nearest Tailwind CSS token is neutral-700 (#404040).

What colors go well with #263B39?

As a neutral, #263B39 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 #263B39 the same as CSS darkslategray?

No — #263B39 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.

#263B39 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #263B39

Not just a swatch — here's how #263B39 works with other colors. Named schemes with #263B39 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #263B39 Accent #A7C4BD Surface #E0DABE Secondary #9AA0A0 Anchor #1C3549

Onyx 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 #263B39 Secondary #AEB4B8 Surface #F1F2F0 Support #7994A4 Anchor #2E3236

Onyx 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 #263B39 Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #552341

Onyx 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 #263B39 Anchor #141210 Accent #B9A94D Secondary #1D2C2B Surface #F1EDE3

Onyx 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 #F6F4EF Accent #263B39 Secondary #565E5D Support #979286 Ink #16140F

Onyx 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 Onyx carrying the quiet middle.

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Color Lab

How #263B39 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 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

High

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

Naturalness 9/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 29/100

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

Workable accent with care around contrast.

Surface fit 55/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 94/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #263B39

For UI

For branding

For interior

For fashion

People also use #263B39 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 11.9:1. Use

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

Avoid beside #26363B — 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 #263B39 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: #263B39;
  --color-base-rgb: 38 59 57;
  --color-base-oklch: oklch(33.4% 0.027 188.5);
  --color-50: #F6F9F9;
  --color-100: #E6EFEE;
  --color-200: #CDDFDD;
  --color-300: #A9C6C3;
  --color-400: #87ABA8;
  --color-500: #678E8A;
  --color-600: #536F6C;
  --color-700: #3F504F;
  --color-800: #2B3635;
  --color-900: #1C2221;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F6F9F9',
    100: '#E6EFEE',
    200: '#CDDFDD',
    300: '#A9C6C3',
    400: '#87ABA8',
    500: '#678E8A',
    600: '#536F6C',
    700: '#3F504F',
    800: '#2B3635',
    900: '#1C2221',
  },
}

$base: #263B39;
$base-ink: #FFFFFF;
$base-50: #F6F9F9;
$base-100: #E6EFEE;
$base-200: #CDDFDD;
$base-300: #A9C6C3;
$base-400: #87ABA8;
$base-500: #678E8A;
$base-600: #536F6C;
$base-700: #3F504F;
$base-800: #2B3635;
$base-900: #1C2221;
$base-hover: #1E2F2E;
$base-subtle: #B7CBC9;

{
    "color": {
        "base": {
            "value": "#263B39",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F9F9",
                "type": "color"
            },
            "100": {
                "value": "#E6EFEE",
                "type": "color"
            },
            "200": {
                "value": "#CDDFDD",
                "type": "color"
            },
            "300": {
                "value": "#A9C6C3",
                "type": "color"
            },
            "400": {
                "value": "#87ABA8",
                "type": "color"
            },
            "500": {
                "value": "#678E8A",
                "type": "color"
            },
            "600": {
                "value": "#536F6C",
                "type": "color"
            },
            "700": {
                "value": "#3F504F",
                "type": "color"
            },
            "800": {
                "value": "#2B3635",
                "type": "color"
            },
            "900": {
                "value": "#1C2221",
                "type": "color"
            }
        }
    }
}