What color is #283039?

#283039 is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(40, 48, 57), and in HSL hsl(212, 18%, 19%).

Is #283039 accessible as text?

On white, #283039 has a contrast ratio of 13.36:1 (passes WCAG AA for body text); on black it is 1.57:1 (fails). For text placed on #283039, use white for the best readability.

What is the closest Tailwind color to #283039?

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

What colors go well with #283039?

As a neutral, #283039 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 #283039 the same as CSS darkslategray?

No — #283039 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.

#283039 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #283039

Not just a swatch — here's how #283039 works with other colors. Named schemes with #283039 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #283039 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #484F58

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 #283039 Secondary #7F4537 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.

Japanese Sand Base · 5 colors

Base #283039 Surface #ECEADC Highlight #F4F2E7 Secondary #B2B2A0 Ink #2C2724

Gunmetal Gray sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Coastal Morning Lead · 5 colors

Lead #283039 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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #283039 Secondary #515458 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.

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Color Lab

How #283039 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 45/100

Neutral

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

Softness 33/100

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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 66/100

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 23/100

Low

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

Surface fit 59/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 96/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #283039

For UI

For branding

For interior

For fashion

People also use #283039 with

Dark Slate Gray Gunmetal Gray 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 13.4:1. Use

Subtle surface Use #D0D5DB for cards and hover fills. Tint 80

Avoid beside #282A39 — 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 #283039 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: #283039;
  --color-base-rgb: 40 48 57;
  --color-base-oklch: oklch(30.5% 0.020 251.5);
  --color-50: #F6F7F9;
  --color-100: #E7EAEE;
  --color-200: #CFD6DE;
  --color-300: #ACB7C3;
  --color-400: #8A98A8;
  --color-500: #6B798A;
  --color-600: #56606C;
  --color-700: #40474F;
  --color-800: #2C3035;
  --color-900: #1C1E21;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F6F7F9',
    100: '#E7EAEE',
    200: '#CFD6DE',
    300: '#ACB7C3',
    400: '#8A98A8',
    500: '#6B798A',
    600: '#56606C',
    700: '#40474F',
    800: '#2C3035',
    900: '#1C1E21',
  },
}

$base: #283039;
$base-ink: #FFFFFF;
$base-50: #F6F7F9;
$base-100: #E7EAEE;
$base-200: #CFD6DE;
$base-300: #ACB7C3;
$base-400: #8A98A8;
$base-500: #6B798A;
$base-600: #56606C;
$base-700: #40474F;
$base-800: #2C3035;
$base-900: #1C1E21;
$base-hover: #20262E;
$base-subtle: #B9C0CA;

{
    "color": {
        "base": {
            "value": "#283039",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F7F9",
                "type": "color"
            },
            "100": {
                "value": "#E7EAEE",
                "type": "color"
            },
            "200": {
                "value": "#CFD6DE",
                "type": "color"
            },
            "300": {
                "value": "#ACB7C3",
                "type": "color"
            },
            "400": {
                "value": "#8A98A8",
                "type": "color"
            },
            "500": {
                "value": "#6B798A",
                "type": "color"
            },
            "600": {
                "value": "#56606C",
                "type": "color"
            },
            "700": {
                "value": "#40474F",
                "type": "color"
            },
            "800": {
                "value": "#2C3035",
                "type": "color"
            },
            "900": {
                "value": "#1C1E21",
                "type": "color"
            }
        }
    }
}