What color is #21344A?

#21344A is a dark blue. In RGB it is rgb(33, 52, 74), and in HSL hsl(212, 38%, 21%).

Is #21344A accessible as text?

On white, #21344A has a contrast ratio of 12.69:1 (passes WCAG AA for body text); on black it is 1.65:1 (fails). For text placed on #21344A, use white for the best readability.

What is the closest Tailwind color to #21344A?

The nearest Tailwind CSS token is cyan-950 (#053345).

What colors go well with #21344A?

#21344A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4A3721. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #21344A below.

Is #21344A good for buttons?

#21344A works well for buttons and highlights, but use white text on #21344A — black text only reaches 1.65:1, below the 4.5:1 needed for normal-size labels.

Is #21344A the same as CSS darkslategray?

No — #21344A is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#21344A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #21344A

Not just a swatch — here's how #21344A works with other colors. Named schemes with #21344A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #21344A 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 #21344A Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 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 #21344A Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #425469

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 #21344A Secondary #7F4537 Surface #E1DDC1 Accent #375246 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 #21344A Secondary #525961 Support #959386 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 #21344A 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 37/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 65/100

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 31/100

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 18/100

Very low

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

UI accent fit 32/100

Low

Workable accent with care around contrast.

Surface fit 50/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #21344A

For UI

For branding

For interior

For fashion

People also use #21344A with

Feldgrau Russian Violet Espresso 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 12.7:1. Use

Subtle surface Use #CCD6E2 for cards and hover fills. Tint 80

Avoid beside #21274A — 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 #21344A 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: #21344A;
  --color-base-rgb: 33 52 74;
  --color-base-oklch: oklch(32.0% 0.047 252.8);
  --color-50: #F4F7FB;
  --color-100: #E2EAF3;
  --color-200: #C7D5E6;
  --color-300: #9FB6D0;
  --color-400: #7A97B8;
  --color-500: #59789C;
  --color-600: #495F79;
  --color-700: #384657;
  --color-800: #27303A;
  --color-900: #191E24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F4F7FB',
    100: '#E2EAF3',
    200: '#C7D5E6',
    300: '#9FB6D0',
    400: '#7A97B8',
    500: '#59789C',
    600: '#495F79',
    700: '#384657',
    800: '#27303A',
    900: '#191E24',
  },
}

$base: #21344A;
$base-ink: #FFFFFF;
$base-50: #F4F7FB;
$base-100: #E2EAF3;
$base-200: #C7D5E6;
$base-300: #9FB6D0;
$base-400: #7A97B8;
$base-500: #59789C;
$base-600: #495F79;
$base-700: #384657;
$base-800: #27303A;
$base-900: #191E24;
$base-hover: #1B2A3B;
$base-subtle: #B1C1D4;

{
    "color": {
        "base": {
            "value": "#21344A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F7FB",
                "type": "color"
            },
            "100": {
                "value": "#E2EAF3",
                "type": "color"
            },
            "200": {
                "value": "#C7D5E6",
                "type": "color"
            },
            "300": {
                "value": "#9FB6D0",
                "type": "color"
            },
            "400": {
                "value": "#7A97B8",
                "type": "color"
            },
            "500": {
                "value": "#59789C",
                "type": "color"
            },
            "600": {
                "value": "#495F79",
                "type": "color"
            },
            "700": {
                "value": "#384657",
                "type": "color"
            },
            "800": {
                "value": "#27303A",
                "type": "color"
            },
            "900": {
                "value": "#191E24",
                "type": "color"
            }
        }
    }
}