What color is #403138?

#403138 is a dark low-chroma warm gray with a subtle warm cast. In RGB it is rgb(64, 49, 56), and in HSL hsl(332, 13%, 22%).

Is #403138 accessible as text?

On white, #403138 has a contrast ratio of 12.25:1 (passes WCAG AA for body text); on black it is 1.71:1 (fails). For text placed on #403138, use white for the best readability.

What is the closest Tailwind color to #403138?

The nearest Tailwind CSS token is zinc-700 (#3F3F46).

What colors go well with #403138?

As a neutral, #403138 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 #403138 the same as CSS darkslategray?

No — #403138 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.

#403138 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #403138

Not just a swatch — here's how #403138 works with other colors. Named schemes with #403138 in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #403138 Secondary #7D472C Surface #EBD8C1 Accent #454F39 Anchor #5A2232

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 #403138 Surface #F1E8DC Highlight #F7F1E7 Secondary #BCAEA0 Ink #2B2723

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 #403138 Anchor #141210 Accent #D59B50 Secondary #31252A Surface #F3EDE3

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 #403138 Secondary #5F5A5C Support #9C9087 Ink #17140F

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.

Berry & Cream Lead · 5 colors

Lead #403138 Surface #F4E6D7 Anchor #5E203B Accent #E6C2C4 Secondary #332B2E

Onyx sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

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Color Lab

How #403138 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 54/100

Neutral

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 5/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 39/100

Low

A faint retro warmth without tipping into sepia.

Luxury 65/100

High

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

Brand distinctiveness 9/100

Very low

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

UI accent fit 29/100

Low

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

Surface fit 56/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 97/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #403138

For UI

For branding

For interior

For fashion

People also use #403138 with

Eggplant Onyx Gainsboro Taupe

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 12.2:1. Use

Subtle surface Use #DBD3D7 for cards and hover fills. Tint 80

Avoid beside #3F3133 — 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 #403138 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: #403138;
  --color-base-rgb: 64 49 56;
  --color-base-oklch: oklch(33.2% 0.024 348.8);
  --color-50: #F8F6F7;
  --color-100: #EDE8EA;
  --color-200: #DBD1D6;
  --color-300: #C0AFB7;
  --color-400: #A48E98;
  --color-500: #866F7A;
  --color-600: #695960;
  --color-700: #4D4247;
  --color-800: #342D30;
  --color-900: #201D1E;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F8F6F7',
    100: '#EDE8EA',
    200: '#DBD1D6',
    300: '#C0AFB7',
    400: '#A48E98',
    500: '#866F7A',
    600: '#695960',
    700: '#4D4247',
    800: '#342D30',
    900: '#201D1E',
  },
}

$base: #403138;
$base-ink: #FFFFFF;
$base-50: #F8F6F7;
$base-100: #EDE8EA;
$base-200: #DBD1D6;
$base-300: #C0AFB7;
$base-400: #A48E98;
$base-500: #866F7A;
$base-600: #695960;
$base-700: #4D4247;
$base-800: #342D30;
$base-900: #201D1E;
$base-hover: #33272C;
$base-subtle: #C9BDC3;

{
    "color": {
        "base": {
            "value": "#403138",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F8F6F7",
                "type": "color"
            },
            "100": {
                "value": "#EDE8EA",
                "type": "color"
            },
            "200": {
                "value": "#DBD1D6",
                "type": "color"
            },
            "300": {
                "value": "#C0AFB7",
                "type": "color"
            },
            "400": {
                "value": "#A48E98",
                "type": "color"
            },
            "500": {
                "value": "#866F7A",
                "type": "color"
            },
            "600": {
                "value": "#695960",
                "type": "color"
            },
            "700": {
                "value": "#4D4247",
                "type": "color"
            },
            "800": {
                "value": "#342D30",
                "type": "color"
            },
            "900": {
                "value": "#201D1E",
                "type": "color"
            }
        }
    }
}