What color is #30403D?

#30403D is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(48, 64, 61), and in HSL hsl(169, 14%, 22%).

Is #30403D accessible as text?

On white, #30403D has a contrast ratio of 10.90:1 (passes WCAG AA for body text); on black it is 1.93:1 (fails). For text placed on #30403D, use white for the best readability.

What is the closest Tailwind color to #30403D?

The nearest Tailwind CSS token is neutral-700 (#404040).

What colors go well with #30403D?

As a neutral, #30403D 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 #30403D the same as CSS darkslategray?

No — #30403D 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.

#30403D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #30403D

Not just a swatch — here's how #30403D works with other colors. Named schemes with #30403D in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #30403D Surface #14161A Highlight #F4F6F8 Secondary #586771 Accent #51605D

Onyx is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Onyx.

Vintage Leather Lead · 5 colors

Lead #30403D Secondary #734F18 Surface #E4DCC0 Accent #3A5142 Anchor #5B241E

Onyx 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 #30403D Surface #EDEADC Highlight #F5F1E7 Secondary #B5B19F Ink #2A2723

Onyx 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.

Luxury Packaging Feature · 5 colors

Feature #30403D Anchor #141210 Accent #BAA94D Secondary #1E2C2A Surface #F1EDE3

Onyx carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #30403D Secondary #5E6462 Support #979286 Ink #16140F

Onyx 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 Onyx carrying the quiet middle.

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Color Lab

How #30403D 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 46/100

Neutral

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

High

Mid depth — usable as an accent or a muted ground.

Naturalness 11/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 62/100

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 33/100

Low

Workable accent with care around contrast.

Surface fit 55/100

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 #30403D

For UI

For branding

For interior

For fashion

People also use #30403D with

Feldgrau Onyx Platinum Dark Slate Gray

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 10.9:1. Use

Subtle surface Use #D3DBDA for cards and hover fills. Tint 80

Avoid beside #303E40 — 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 #30403D 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: #30403D;
  --color-base-rgb: 48 64 61;
  --color-base-oklch: oklch(35.6% 0.021 182.3);
  --color-50: #F6F9F8;
  --color-100: #E8EEED;
  --color-200: #D1DCDA;
  --color-300: #AFC1BD;
  --color-400: #8DA5A0;
  --color-500: #6E8782;
  --color-600: #586A66;
  --color-700: #424D4B;
  --color-800: #2D3433;
  --color-900: #1D2020;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F6F9F8',
    100: '#E8EEED',
    200: '#D1DCDA',
    300: '#AFC1BD',
    400: '#8DA5A0',
    500: '#6E8782',
    600: '#586A66',
    700: '#424D4B',
    800: '#2D3433',
    900: '#1D2020',
  },
}

$base: #30403D;
$base-ink: #FFFFFF;
$base-50: #F6F9F8;
$base-100: #E8EEED;
$base-200: #D1DCDA;
$base-300: #AFC1BD;
$base-400: #8DA5A0;
$base-500: #6E8782;
$base-600: #586A66;
$base-700: #424D4B;
$base-800: #2D3433;
$base-900: #1D2020;
$base-hover: #273331;
$base-subtle: #BDCAC7;

{
    "color": {
        "base": {
            "value": "#30403D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F9F8",
                "type": "color"
            },
            "100": {
                "value": "#E8EEED",
                "type": "color"
            },
            "200": {
                "value": "#D1DCDA",
                "type": "color"
            },
            "300": {
                "value": "#AFC1BD",
                "type": "color"
            },
            "400": {
                "value": "#8DA5A0",
                "type": "color"
            },
            "500": {
                "value": "#6E8782",
                "type": "color"
            },
            "600": {
                "value": "#586A66",
                "type": "color"
            },
            "700": {
                "value": "#424D4B",
                "type": "color"
            },
            "800": {
                "value": "#2D3433",
                "type": "color"
            },
            "900": {
                "value": "#1D2020",
                "type": "color"
            }
        }
    }
}