What color is #40534E?

#40534E is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(64, 83, 78), and in HSL hsl(164, 13%, 29%).

Is #40534E accessible as text?

On white, #40534E has a contrast ratio of 8.19:1 (passes WCAG AA for body text); on black it is 2.57:1 (fails). For text placed on #40534E, use white for the best readability.

What is the closest Tailwind color to #40534E?

The nearest Tailwind CSS token is neutral-600 (#525252).

What colors go well with #40534E?

As a neutral, #40534E 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 #40534E the same as CSS darkslategray?

No — #40534E 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.

#40534E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #40534E

Not just a swatch — here's how #40534E works with other colors. Named schemes with #40534E in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #40534E Secondary #734F19 Surface #E4DCC0 Accent #3B5141 Anchor #5B231E

Dark Slate 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.

Modern Café Dominant · 5 colors

Dominant #40534E Anchor #382B1E Surface #ECE4D0 Accent #839C70 Secondary #3A3833

Dark Slate Gray anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Japanese Sand Base · 5 colors

Base #40534E Surface #EDEADC Highlight #F5F1E7 Secondary #B5B19F Ink #2A2723

Dark Slate Gray sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #40534E Secondary #717876 Support #979286 Ink #16140F

Dark Slate 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 Dark Slate Gray carrying the quiet middle.

Tech Product Signal · 5 colors

Signal #40534E Surface #14161A Highlight #F4F6F8 Secondary #586771 Accent #637570

Dark Slate 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 Dark Slate Gray.

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Color Lab

How #40534E 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 46/100

Neutral

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

Softness 44/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 54/100

Moderate

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

Naturalness 15/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 57/100

Moderate

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 48/100

Moderate

Workable accent with care around contrast.

Surface fit 50/100

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 #40534E

For UI

For branding

For interior

For fashion

People also use #40534E with

Ebony Outer Space Eggplant 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 8.2:1. Use

Subtle surface Use #D7DEDC for cards and hover fills. Tint 80

Avoid beside #405254 — 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 #40534E 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: #40534E;
  --color-base-rgb: 64 83 78;
  --color-base-oklch: oklch(42.5% 0.025 177.2);
  --color-50: #F6F8F8;
  --color-100: #E8EDEC;
  --color-200: #D1DBD9;
  --color-300: #AFC0BC;
  --color-400: #8EA49E;
  --color-500: #6F8680;
  --color-600: #596965;
  --color-700: #424D4A;
  --color-800: #2D3432;
  --color-900: #1D201F;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F6F8F8',
    100: '#E8EDEC',
    200: '#D1DBD9',
    300: '#AFC0BC',
    400: '#8EA49E',
    500: '#6F8680',
    600: '#596965',
    700: '#424D4A',
    800: '#2D3432',
    900: '#1D201F',
  },
}

$base: #40534E;
$base-ink: #FFFFFF;
$base-50: #F6F8F8;
$base-100: #E8EDEC;
$base-200: #D1DBD9;
$base-300: #AFC0BC;
$base-400: #8EA49E;
$base-500: #6F8680;
$base-600: #596965;
$base-700: #424D4A;
$base-800: #2D3432;
$base-900: #1D201F;
$base-hover: #33433F;
$base-subtle: #C3CECB;

{
    "color": {
        "base": {
            "value": "#40534E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F8F8",
                "type": "color"
            },
            "100": {
                "value": "#E8EDEC",
                "type": "color"
            },
            "200": {
                "value": "#D1DBD9",
                "type": "color"
            },
            "300": {
                "value": "#AFC0BC",
                "type": "color"
            },
            "400": {
                "value": "#8EA49E",
                "type": "color"
            },
            "500": {
                "value": "#6F8680",
                "type": "color"
            },
            "600": {
                "value": "#596965",
                "type": "color"
            },
            "700": {
                "value": "#424D4A",
                "type": "color"
            },
            "800": {
                "value": "#2D3432",
                "type": "color"
            },
            "900": {
                "value": "#1D201F",
                "type": "color"
            }
        }
    }
}

Palettes built on #40534E

Color Lab

Pairs with #40534E

UI roles & guardrails

In real applications

Scales

Every model

Export