What color is #40503D?

#40503D is a dark, muted green. In RGB it is rgb(64, 80, 61), and in HSL hsl(111, 13%, 28%).

Is #40503D accessible as text?

On white, #40503D has a contrast ratio of 8.63:1 (passes WCAG AA for body text); on black it is 2.43:1 (fails). For text placed on #40503D, use white for the best readability.

What is the closest Tailwind color to #40503D?

The nearest Tailwind CSS token is olive-700 (#474739).

What colors go well with #40503D?

#40503D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4E3E51. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #40503D below.

Is #40503D good for buttons?

#40503D works well for buttons and highlights, but use white text on #40503D — black text only reaches 2.43:1, below the 4.5:1 needed for normal-size labels.

Is #40503D the same as CSS darkslategray?

No — #40503D 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.

#40503D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #40503D

Not just a swatch — here's how #40503D works with other colors. Named schemes with #40503D in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #40503D Secondary #4D6B3B Accent #AE6B00 Surface #EFEAD6 Anchor #3C2F21

Dark Slate Gray leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Vintage Leather Lead · 5 colors

Lead #40503D Secondary #754E1C Surface #E6DBC0 Accent #3D5140 Anchor #5B2322

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 #40503D Anchor #392B1E Surface #EDE4D0 Accent #889B6D 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 #40503D Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

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 #40503D Secondary #6E746D Support #989286 Ink #17140F

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.

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Color Lab

How #40503D 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 50/100

Neutral

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

Softness 42/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 56/100

Moderate

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

Naturalness 53/100

Moderate

Loosely natural — an earthy edge without being rustic.

Vintage feel 46/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 59/100

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 51/100

Moderate

Workable accent with care around contrast.

Surface fit 47/100

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 #40503D

For UI

For branding

For interior

For fashion

People also use #40503D with

Ebony Dark Slate Gray Eggplant Platinum Outer Space

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 8.6:1. Use

Subtle surface Use #D8DED7 for cards and hover fills. Tint 80

Avoid beside #3E5142 — 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 #40503D 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: #40503D;
  --color-base-rgb: 64 80 61;
  --color-base-oklch: oklch(41.2% 0.037 140.6);
  --color-50: #F7F8F6;
  --color-100: #E9EDE8;
  --color-200: #D3DBD1;
  --color-300: #B2C0AF;
  --color-400: #91A48E;
  --color-500: #72866F;
  --color-600: #5B6959;
  --color-700: #444D42;
  --color-800: #2E342D;
  --color-900: #1D201D;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F7F8F6',
    100: '#E9EDE8',
    200: '#D3DBD1',
    300: '#B2C0AF',
    400: '#91A48E',
    500: '#72866F',
    600: '#5B6959',
    700: '#444D42',
    800: '#2E342D',
    900: '#1D201D',
  },
}

$base: #40503D;
$base-ink: #FFFFFF;
$base-50: #F7F8F6;
$base-100: #E9EDE8;
$base-200: #D3DBD1;
$base-300: #B2C0AF;
$base-400: #91A48E;
$base-500: #72866F;
$base-600: #5B6959;
$base-700: #444D42;
$base-800: #2E342D;
$base-900: #1D201D;
$base-hover: #344132;
$base-subtle: #C4CDC2;

{
    "color": {
        "base": {
            "value": "#40503D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F8F6",
                "type": "color"
            },
            "100": {
                "value": "#E9EDE8",
                "type": "color"
            },
            "200": {
                "value": "#D3DBD1",
                "type": "color"
            },
            "300": {
                "value": "#B2C0AF",
                "type": "color"
            },
            "400": {
                "value": "#91A48E",
                "type": "color"
            },
            "500": {
                "value": "#72866F",
                "type": "color"
            },
            "600": {
                "value": "#5B6959",
                "type": "color"
            },
            "700": {
                "value": "#444D42",
                "type": "color"
            },
            "800": {
                "value": "#2E342D",
                "type": "color"
            },
            "900": {
                "value": "#1D201D",
                "type": "color"
            }
        }
    }
}

Palettes built on #40503D

Color Lab

Pairs with #40503D

UI roles & guardrails

In real applications

Scales

Every model

Export