What color is #2B3F4E?

#2B3F4E is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(43, 63, 78), and in HSL hsl(206, 29%, 24%).

Is #2B3F4E accessible as text?

On white, #2B3F4E has a contrast ratio of 10.92:1 (passes WCAG AA for body text); on black it is 1.92:1 (fails). For text placed on #2B3F4E, use white for the best readability.

What is the closest Tailwind color to #2B3F4E?

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

What colors go well with #2B3F4E?

As a neutral, #2B3F4E 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 #2B3F4E the same as CSS darkslategray?

No — #2B3F4E 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.

#2B3F4E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2B3F4E

Not just a swatch — here's how #2B3F4E works with other colors. Named schemes with #2B3F4E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #2B3F4E Accent #A5C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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 #2B3F4E Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Charcoal 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 #2B3F4E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4D606E

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

Vintage Leather Lead · 5 colors

Lead #2B3F4E Secondary #7F4439 Surface #E2DDC0 Accent #385245 Anchor #57233C

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #2B3F4E Secondary #5C6469 Support #969386 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 #2B3F4E 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 39/100

Neutral

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

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 61/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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 38/100

Low

Workable accent with care around contrast.

Surface fit 51/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 91/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #2B3F4E

For UI

For branding

For interior

For fashion

People also use #2B3F4E with

Feldgrau Prussian Blue Taupe Gainsboro 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 10.9:1. Use

Subtle surface Use #D0D9E0 for cards and hover fills. Tint 80

Avoid beside #2B344F — 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 #2B3F4E 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: #2B3F4E;
  --color-base-rgb: 43 63 78;
  --color-base-oklch: oklch(35.7% 0.036 241.4);
  --color-50: #F5F8FA;
  --color-100: #E4EBF1;
  --color-200: #CAD8E2;
  --color-300: #A5BACA;
  --color-400: #819CB1;
  --color-500: #617E94;
  --color-600: #4F6373;
  --color-700: #3C4953;
  --color-800: #293137;
  --color-900: #1B1F23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F5F8FA',
    100: '#E4EBF1',
    200: '#CAD8E2',
    300: '#A5BACA',
    400: '#819CB1',
    500: '#617E94',
    600: '#4F6373',
    700: '#3C4953',
    800: '#293137',
    900: '#1B1F23',
  },
}

$base: #2B3F4E;
$base-ink: #FFFFFF;
$base-50: #F5F8FA;
$base-100: #E4EBF1;
$base-200: #CAD8E2;
$base-300: #A5BACA;
$base-400: #819CB1;
$base-500: #617E94;
$base-600: #4F6373;
$base-700: #3C4953;
$base-800: #293137;
$base-900: #1B1F23;
$base-hover: #23333F;
$base-subtle: #B8C7D2;

{
    "color": {
        "base": {
            "value": "#2B3F4E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F8FA",
                "type": "color"
            },
            "100": {
                "value": "#E4EBF1",
                "type": "color"
            },
            "200": {
                "value": "#CAD8E2",
                "type": "color"
            },
            "300": {
                "value": "#A5BACA",
                "type": "color"
            },
            "400": {
                "value": "#819CB1",
                "type": "color"
            },
            "500": {
                "value": "#617E94",
                "type": "color"
            },
            "600": {
                "value": "#4F6373",
                "type": "color"
            },
            "700": {
                "value": "#3C4953",
                "type": "color"
            },
            "800": {
                "value": "#293137",
                "type": "color"
            },
            "900": {
                "value": "#1B1F23",
                "type": "color"
            }
        }
    }
}