What color is #2B4240?

#2B4240 is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(43, 66, 64), and in HSL hsl(175, 21%, 21%).

Is #2B4240 accessible as text?

On white, #2B4240 has a contrast ratio of 10.74:1 (passes WCAG AA for body text); on black it is 1.96:1 (fails). For text placed on #2B4240, use white for the best readability.

What is the closest Tailwind color to #2B4240?

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

What colors go well with #2B4240?

As a neutral, #2B4240 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 #2B4240 the same as CSS darkslategray?

No — #2B4240 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.

#2B4240 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2B4240

Not just a swatch — here's how #2B4240 works with other colors. Named schemes with #2B4240 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #2B4240 Accent #A7C4BD Surface #E0DABE Secondary #9AA0A0 Anchor #1C3549

Charcoal 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 #2B4240 Secondary #AEB4B8 Surface #F1F2F0 Support #7994A4 Anchor #2E3236

Charcoal 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 #2B4240 Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #552341

Charcoal 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 #2B4240 Anchor #141210 Accent #B9A94D Secondary #1D2C2B Surface #F1EDE3

Charcoal 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 #2B4240 Secondary #5D6564 Support #979286 Ink #16140F

Charcoal 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 Charcoal carrying the quiet middle.

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Color Lab

How #2B4240 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 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

High

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

Naturalness 9/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 11/100

Very low

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

UI accent fit 36/100

Low

Workable accent with care around contrast.

Surface fit 53/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 93/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #2B4240

For UI

For branding

For interior

For fashion

People also use #2B4240 with

Hunter Green Gunmetal Gray Bistre Platinum Dark Slate Gray

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 10.7:1. Use

Subtle surface Use #D1DDDC for cards and hover fills. Tint 80

Avoid beside #2A3B41 — 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 #2B4240 at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #2B4240;
  --color-base-rgb: 43 66 64;
  --color-base-oklch: oklch(35.9% 0.029 189.1);
  --color-50: #F6F9F9;
  --color-100: #E6EFEE;
  --color-200: #CEDFDD;
  --color-300: #AAC5C3;
  --color-400: #88AAA7;
  --color-500: #688D8A;
  --color-600: #546E6C;
  --color-700: #3F504E;
  --color-800: #2B3535;
  --color-900: #1C2121;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F6F9F9',
    100: '#E6EFEE',
    200: '#CEDFDD',
    300: '#AAC5C3',
    400: '#88AAA7',
    500: '#688D8A',
    600: '#546E6C',
    700: '#3F504E',
    800: '#2B3535',
    900: '#1C2121',
  },
}

$base: #2B4240;
$base-ink: #FFFFFF;
$base-50: #F6F9F9;
$base-100: #E6EFEE;
$base-200: #CEDFDD;
$base-300: #AAC5C3;
$base-400: #88AAA7;
$base-500: #688D8A;
$base-600: #546E6C;
$base-700: #3F504E;
$base-800: #2B3535;
$base-900: #1C2121;
$base-hover: #223432;
$base-subtle: #B9CCCB;

{
    "color": {
        "base": {
            "value": "#2B4240",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F9F9",
                "type": "color"
            },
            "100": {
                "value": "#E6EFEE",
                "type": "color"
            },
            "200": {
                "value": "#CEDFDD",
                "type": "color"
            },
            "300": {
                "value": "#AAC5C3",
                "type": "color"
            },
            "400": {
                "value": "#88AAA7",
                "type": "color"
            },
            "500": {
                "value": "#688D8A",
                "type": "color"
            },
            "600": {
                "value": "#546E6C",
                "type": "color"
            },
            "700": {
                "value": "#3F504E",
                "type": "color"
            },
            "800": {
                "value": "#2B3535",
                "type": "color"
            },
            "900": {
                "value": "#1C2121",
                "type": "color"
            }
        }
    }
}