What color is #21293D?

#21293D is a dark, muted blue. In RGB it is rgb(33, 41, 61), and in HSL hsl(223, 30%, 18%).

Is #21293D accessible as text?

On white, #21293D has a contrast ratio of 14.49:1 (passes WCAG AA for body text); on black it is 1.45:1 (fails). For text placed on #21293D, use white for the best readability.

What is the closest Tailwind color to #21293D?

The nearest Tailwind CSS token is mist-800 (#22292B).

What colors go well with #21293D?

#21293D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3C3420. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #21293D below.

Is #21293D good for buttons?

#21293D works well for buttons and highlights, but use white text on #21293D — black text only reaches 1.45:1, below the 4.5:1 needed for normal-size labels.

Is #21293D the same as CSS midnightblue?

No — #21293D is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#21293D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #21293D

Not just a swatch — here's how #21293D works with other colors. Named schemes with #21293D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #21293D Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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 #21293D Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 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 #21293D Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #40485C

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 #21293D Secondary #7F4535 Surface #EED7C2 Accent #365246 Anchor #58223A

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 #F8F4EF Accent #21293D Secondary #4A4E56 Support #9D8F88 Ink #18140F

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 #21293D 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 41/100

Neutral

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 68/100

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 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 70/100

High

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

Brand distinctiveness 15/100

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 55/100

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 #21293D

For UI

For branding

For interior

For fashion

People also use #21293D 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 14.5:1. Use

Subtle surface Use #CCD1DE for cards and hover fills. Tint 80

Avoid beside #22203C — 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 #21293D 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: #21293D;
  --color-base-rgb: 33 41 61;
  --color-base-oklch: oklch(28.3% 0.039 267.2);
  --color-50: #F5F6FA;
  --color-100: #E4E8F1;
  --color-200: #CAD1E2;
  --color-300: #A4AFCB;
  --color-400: #808EB2;
  --color-500: #606F95;
  --color-600: #4E5974;
  --color-700: #3B4254;
  --color-800: #292D38;
  --color-900: #1B1D23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F5F6FA',
    100: '#E4E8F1',
    200: '#CAD1E2',
    300: '#A4AFCB',
    400: '#808EB2',
    500: '#606F95',
    600: '#4E5974',
    700: '#3B4254',
    800: '#292D38',
    900: '#1B1D23',
  },
}

$base: #21293D;
$base-ink: #FFFFFF;
$base-50: #F5F6FA;
$base-100: #E4E8F1;
$base-200: #CAD1E2;
$base-300: #A4AFCB;
$base-400: #808EB2;
$base-500: #606F95;
$base-600: #4E5974;
$base-700: #3B4254;
$base-800: #292D38;
$base-900: #1B1D23;
$base-hover: #1A2030;
$base-subtle: #B2BACF;

{
    "color": {
        "base": {
            "value": "#21293D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E4E8F1",
                "type": "color"
            },
            "200": {
                "value": "#CAD1E2",
                "type": "color"
            },
            "300": {
                "value": "#A4AFCB",
                "type": "color"
            },
            "400": {
                "value": "#808EB2",
                "type": "color"
            },
            "500": {
                "value": "#606F95",
                "type": "color"
            },
            "600": {
                "value": "#4E5974",
                "type": "color"
            },
            "700": {
                "value": "#3B4254",
                "type": "color"
            },
            "800": {
                "value": "#292D38",
                "type": "color"
            },
            "900": {
                "value": "#1B1D23",
                "type": "color"
            }
        }
    }
}