What color is #212E3B?

#212E3B is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(33, 46, 59), and in HSL hsl(210, 28%, 18%).

Is #212E3B accessible as text?

On white, #212E3B has a contrast ratio of 13.83:1 (passes WCAG AA for body text); on black it is 1.52:1 (fails). For text placed on #212E3B, use white for the best readability.

What is the closest Tailwind color to #212E3B?

The nearest Tailwind CSS token is gray-800 (#1E2939).

What colors go well with #212E3B?

As a neutral, #212E3B 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 #212E3B the same as CSS darkslategray?

No — #212E3B 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.

#212E3B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #212E3B

Not just a swatch — here's how #212E3B works with other colors. Named schemes with #212E3B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #212E3B Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Gunmetal Gray 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 #212E3B Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Gunmetal Gray 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 #212E3B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #414D5A

Gunmetal 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 Gunmetal Gray.

Vintage Leather Lead · 5 colors

Lead #212E3B Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233B

Gunmetal 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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #212E3B Secondary #4D5257 Support #969386 Ink #16140F

Gunmetal 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 Gunmetal Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #212E3B 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 42/100

Neutral

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

Softness 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 26/100

Low

A faint retro warmth without tipping into sepia.

Luxury 68/100

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 23/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 57/100

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 #212E3B

For UI

For branding

For interior

For fashion

People also use #212E3B with

Dark Slate Gray Russian Violet Bistre 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 13.8:1. Use

Subtle surface Use #CDD5DE for cards and hover fills. Tint 80

Avoid beside #21253B — 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 #212E3B 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: #212E3B;
  --color-base-rgb: 33 46 59;
  --color-base-oklch: oklch(29.5% 0.030 248.9);
  --color-50: #F5F7FA;
  --color-100: #E5EBF1;
  --color-200: #CBD6E2;
  --color-300: #A6B8CA;
  --color-400: #8299B0;
  --color-500: #627A93;
  --color-600: #4F6172;
  --color-700: #3C4753;
  --color-800: #2A3037;
  --color-900: #1B1F22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F5F7FA',
    100: '#E5EBF1',
    200: '#CBD6E2',
    300: '#A6B8CA',
    400: '#8299B0',
    500: '#627A93',
    600: '#4F6172',
    700: '#3C4753',
    800: '#2A3037',
    900: '#1B1F22',
  },
}

$base: #212E3B;
$base-ink: #FFFFFF;
$base-50: #F5F7FA;
$base-100: #E5EBF1;
$base-200: #CBD6E2;
$base-300: #A6B8CA;
$base-400: #8299B0;
$base-500: #627A93;
$base-600: #4F6172;
$base-700: #3C4753;
$base-800: #2A3037;
$base-900: #1B1F22;
$base-hover: #1A252F;
$base-subtle: #B3C0CE;

{
    "color": {
        "base": {
            "value": "#212E3B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F7FA",
                "type": "color"
            },
            "100": {
                "value": "#E5EBF1",
                "type": "color"
            },
            "200": {
                "value": "#CBD6E2",
                "type": "color"
            },
            "300": {
                "value": "#A6B8CA",
                "type": "color"
            },
            "400": {
                "value": "#8299B0",
                "type": "color"
            },
            "500": {
                "value": "#627A93",
                "type": "color"
            },
            "600": {
                "value": "#4F6172",
                "type": "color"
            },
            "700": {
                "value": "#3C4753",
                "type": "color"
            },
            "800": {
                "value": "#2A3037",
                "type": "color"
            },
            "900": {
                "value": "#1B1F22",
                "type": "color"
            }
        }
    }
}