What color is #28343B?

#28343B is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(40, 52, 59), and in HSL hsl(202, 19%, 19%).

Is #28343B accessible as text?

On white, #28343B has a contrast ratio of 12.77:1 (passes WCAG AA for body text); on black it is 1.64:1 (fails). For text placed on #28343B, use white for the best readability.

What is the closest Tailwind color to #28343B?

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

What colors go well with #28343B?

As a neutral, #28343B 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 #28343B the same as CSS darkslategray?

No — #28343B 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.

#28343B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #28343B

Not just a swatch — here's how #28343B works with other colors. Named schemes with #28343B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #28343B Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Gunmetal Gray opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Tech Product Signal · 5 colors

Signal #28343B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #48545A

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.

Nordic Calm Accent · 5 colors

Accent #28343B 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.

Vintage Leather Lead · 5 colors

Lead #28343B Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #57233D

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 #28343B Secondary #53585B 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 #28343B 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 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 64/100

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 25/100

Low

Clean and current — no dusty, aged cast.

Luxury 65/100

High

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

Brand distinctiveness 8/100

Very low

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

UI accent fit 25/100

Low

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

Surface fit 58/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 95/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #28343B

For UI

For branding

For interior

For fashion

People also use #28343B with

Dark Slate Gray Gunmetal Gray Bistre Platinum 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 12.8:1. Use

Subtle surface Use #D0D7DB for cards and hover fills. Tint 80

Avoid beside #272D3A — 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 #28343B at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #28343B;
  --color-base-rgb: 40 52 59;
  --color-base-oklch: oklch(31.7% 0.020 233.9);
  --color-50: #F6F8F9;
  --color-100: #E7ECEF;
  --color-200: #CED8DE;
  --color-300: #ABBBC4;
  --color-400: #899DA9;
  --color-500: #6A7F8B;
  --color-600: #55646D;
  --color-700: #40494F;
  --color-800: #2C3235;
  --color-900: #1C1F21;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F6F8F9',
    100: '#E7ECEF',
    200: '#CED8DE',
    300: '#ABBBC4',
    400: '#899DA9',
    500: '#6A7F8B',
    600: '#55646D',
    700: '#40494F',
    800: '#2C3235',
    900: '#1C1F21',
  },
}

$base: #28343B;
$base-ink: #FFFFFF;
$base-50: #F6F8F9;
$base-100: #E7ECEF;
$base-200: #CED8DE;
$base-300: #ABBBC4;
$base-400: #899DA9;
$base-500: #6A7F8B;
$base-600: #55646D;
$base-700: #40494F;
$base-800: #2C3235;
$base-900: #1C1F21;
$base-hover: #1F292E;
$base-subtle: #B8C3CA;

{
    "color": {
        "base": {
            "value": "#28343B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F8F9",
                "type": "color"
            },
            "100": {
                "value": "#E7ECEF",
                "type": "color"
            },
            "200": {
                "value": "#CED8DE",
                "type": "color"
            },
            "300": {
                "value": "#ABBBC4",
                "type": "color"
            },
            "400": {
                "value": "#899DA9",
                "type": "color"
            },
            "500": {
                "value": "#6A7F8B",
                "type": "color"
            },
            "600": {
                "value": "#55646D",
                "type": "color"
            },
            "700": {
                "value": "#40494F",
                "type": "color"
            },
            "800": {
                "value": "#2C3235",
                "type": "color"
            },
            "900": {
                "value": "#1C1F21",
                "type": "color"
            }
        }
    }
}