What color is #263C45?

#263C45 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(38, 60, 69), and in HSL hsl(197, 29%, 21%).

Is #263C45 accessible as text?

On white, #263C45 has a contrast ratio of 11.57:1 (passes WCAG AA for body text); on black it is 1.81:1 (fails). For text placed on #263C45, use white for the best readability.

What is the closest Tailwind color to #263C45?

The nearest Tailwind CSS token is gray-700 (#364153).

What colors go well with #263C45?

As a neutral, #263C45 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 #263C45 the same as CSS darkslategray?

No — #263C45 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.

#263C45 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #263C45

Not just a swatch — here's how #263C45 works with other colors. Named schemes with #263C45 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #263C45 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1E344A

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 #263C45 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 Anchor #2E3236

Onyx 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 #263C45 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #485C65

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

Vintage Leather Lead · 5 colors

Lead #263C45 Secondary #6F5116 Surface #E2DCC0 Accent #385244 Anchor #56233E

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #263C45 Secondary #586063 Support #969386 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 #263C45 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 41/100

Neutral

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

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

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 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 12/100

Very low

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

UI accent fit 34/100

Low

Workable accent with care around contrast.

Surface fit 53/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #263C45

For UI

For branding

For interior

For fashion

People also use #263C45 with

Feldgrau Prussian Blue 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 11.6:1. Use

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

Avoid beside #263245 — 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 #263C45 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: #263C45;
  --color-base-rgb: 38 60 69;
  --color-base-oklch: oklch(34.2% 0.032 225.6);
  --color-50: #F5F8FA;
  --color-100: #E4EDF1;
  --color-200: #CADBE2;
  --color-300: #A5C0CA;
  --color-400: #81A3B1;
  --color-500: #618594;
  --color-600: #4F6973;
  --color-700: #3C4C53;
  --color-800: #293337;
  --color-900: #1B2023;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F5F8FA',
    100: '#E4EDF1',
    200: '#CADBE2',
    300: '#A5C0CA',
    400: '#81A3B1',
    500: '#618594',
    600: '#4F6973',
    700: '#3C4C53',
    800: '#293337',
    900: '#1B2023',
  },
}

$base: #263C45;
$base-ink: #FFFFFF;
$base-50: #F5F8FA;
$base-100: #E4EDF1;
$base-200: #CADBE2;
$base-300: #A5C0CA;
$base-400: #81A3B1;
$base-500: #618594;
$base-600: #4F6973;
$base-700: #3C4C53;
$base-800: #293337;
$base-900: #1B2023;
$base-hover: #1E3037;
$base-subtle: #B5C8D0;

{
    "color": {
        "base": {
            "value": "#263C45",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F8FA",
                "type": "color"
            },
            "100": {
                "value": "#E4EDF1",
                "type": "color"
            },
            "200": {
                "value": "#CADBE2",
                "type": "color"
            },
            "300": {
                "value": "#A5C0CA",
                "type": "color"
            },
            "400": {
                "value": "#81A3B1",
                "type": "color"
            },
            "500": {
                "value": "#618594",
                "type": "color"
            },
            "600": {
                "value": "#4F6973",
                "type": "color"
            },
            "700": {
                "value": "#3C4C53",
                "type": "color"
            },
            "800": {
                "value": "#293337",
                "type": "color"
            },
            "900": {
                "value": "#1B2023",
                "type": "color"
            }
        }
    }
}