What color is #405263?

#405263 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(64, 82, 99), and in HSL hsl(209, 21%, 32%).

Is #405263 accessible as text?

On white, #405263 has a contrast ratio of 8.06:1 (passes WCAG AA for body text); on black it is 2.61:1 (fails). For text placed on #405263, use white for the best readability.

What is the closest Tailwind color to #405263?

The nearest Tailwind CSS token is slate-600 (#45556C).

What colors go well with #405263?

As a neutral, #405263 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 muted neutral, divider, icon or disabled-state color and let the accent carry the color.

Is #405263 the same as CSS darkslategray?

No — #405263 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.

#405263 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #405263

Not just a swatch — here's how #405263 works with other colors. Named schemes with #405263 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #405263 Accent #A5C4C0 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Outer Space 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 #405263 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Outer Space 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 #405263 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #637484

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

Vintage Leather Lead · 5 colors

Lead #405263 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

Outer Space 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 #405263 Secondary #72787F Support #969386 Ink #16140F

Outer Space 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 Outer Space carrying the quiet middle.

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Color Lab

How #405263 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 40/100

Neutral

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

Softness 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 54/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

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

Brand distinctiveness 14/100

Very low

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

UI accent fit 54/100

Moderate

Workable accent with care around contrast.

Surface fit 46/100

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 #405263

For UI

For branding

For interior

For fashion

People also use #405263 with

Myrtle Green Charcoal Umber 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 8.1:1. Use

Subtle surface Use #D7DCE2 for cards and hover fills. Tint 80

Avoid beside #404763 — 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 #405263 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: #405263;
  --color-base-rgb: 64 82 99;
  --color-base-oklch: oklch(43.0% 0.036 247.2);
  --color-50: #F6F7F9;
  --color-100: #E6EBEF;
  --color-200: #CED6DF;
  --color-300: #AAB8C5;
  --color-400: #889AAA;
  --color-500: #687B8D;
  --color-600: #54616E;
  --color-700: #3F4850;
  --color-800: #2B3135;
  --color-900: #1C1F21;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  outer-space: {
    50: '#F6F7F9',
    100: '#E6EBEF',
    200: '#CED6DF',
    300: '#AAB8C5',
    400: '#889AAA',
    500: '#687B8D',
    600: '#54616E',
    700: '#3F4850',
    800: '#2B3135',
    900: '#1C1F21',
  },
}

$base: #405263;
$base-ink: #FFFFFF;
$base-50: #F6F7F9;
$base-100: #E6EBEF;
$base-200: #CED6DF;
$base-300: #AAB8C5;
$base-400: #889AAA;
$base-500: #687B8D;
$base-600: #54616E;
$base-700: #3F4850;
$base-800: #2B3135;
$base-900: #1C1F21;
$base-hover: #34424F;
$base-subtle: #C3CBD3;

{
    "color": {
        "base": {
            "value": "#405263",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F7F9",
                "type": "color"
            },
            "100": {
                "value": "#E6EBEF",
                "type": "color"
            },
            "200": {
                "value": "#CED6DF",
                "type": "color"
            },
            "300": {
                "value": "#AAB8C5",
                "type": "color"
            },
            "400": {
                "value": "#889AAA",
                "type": "color"
            },
            "500": {
                "value": "#687B8D",
                "type": "color"
            },
            "600": {
                "value": "#54616E",
                "type": "color"
            },
            "700": {
                "value": "#3F4850",
                "type": "color"
            },
            "800": {
                "value": "#2B3135",
                "type": "color"
            },
            "900": {
                "value": "#1C1F21",
                "type": "color"
            }
        }
    }
}

Palettes built on #405263

Color Lab

Pairs with #405263

UI roles & guardrails

In real applications

Scales

Every model

Export