What color is #403B53?

#403B53 is a dark, muted indigo. In RGB it is rgb(64, 59, 83), and in HSL hsl(253, 17%, 28%).

Is #403B53 accessible as text?

On white, #403B53 has a contrast ratio of 10.67:1 (passes WCAG AA for body text); on black it is 1.97:1 (fails). For text placed on #403B53, use white for the best readability.

What is the closest Tailwind color to #403B53?

The nearest Tailwind CSS token is mauve-700 (#463947).

What colors go well with #403B53?

#403B53 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4E543B. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #403B53 below.

Is #403B53 good for buttons?

#403B53 works well for buttons and highlights, but use white text on #403B53 — black text only reaches 1.97:1, below the 4.5:1 needed for normal-size labels.

Is #403B53 the same as CSS darkslategray?

No — #403B53 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#403B53 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #403B53

Not just a swatch — here's how #403B53 works with other colors. Named schemes with #403B53 in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #403B53 Secondary #7E4632 Surface #EDD8C2 Accent #355248 Anchor #582237

Charcoal 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 #403B53 Surface #F2E8DD Highlight #F8F0E7 Secondary #BDADA1 Ink #2C2724

Charcoal 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 #403B53 Anchor #141210 Accent #DA9856 Secondary #292732 Surface #F3ECE3

Charcoal 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 #F8F4EF Accent #403B53 Secondary #66646D Support #9D9088 Ink #18140F

Charcoal 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 Charcoal carrying the quiet middle.

Berry & Cream Lead · 5 colors

Lead #403B53 Surface #F5E5D7 Anchor #5C2141 Accent #E5C2C8 Secondary #332B2F

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

Build a working theme in the generator →

Color Lab

How #403B53 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 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 38/100

Low

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 16/100

Very low

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

UI accent fit 42/100

Moderate

Workable accent with care around contrast.

Surface fit 49/100

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 #403B53

For UI

For branding

For interior

For fashion

People also use #403B53 with

Iron Gray Eggplant Army Green Gainsboro Onyx

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 10.7:1. Use

Subtle surface Use #D8D6DF for cards and hover fills. Tint 80

Avoid beside #493B54 — 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 #403B53 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: #403B53;
  --color-base-rgb: 64 59 83;
  --color-base-oklch: oklch(36.8% 0.041 293.8);
  --color-50: #F7F6F9;
  --color-100: #E9E7EE;
  --color-200: #D2CFDD;
  --color-300: #B1ADC3;
  --color-400: #918BA7;
  --color-500: #726B89;
  --color-600: #5B566B;
  --color-700: #44414E;
  --color-800: #2E2C35;
  --color-900: #1D1C21;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F7F6F9',
    100: '#E9E7EE',
    200: '#D2CFDD',
    300: '#B1ADC3',
    400: '#918BA7',
    500: '#726B89',
    600: '#5B566B',
    700: '#44414E',
    800: '#2E2C35',
    900: '#1D1C21',
  },
}

$base: #403B53;
$base-ink: #FFFFFF;
$base-50: #F7F6F9;
$base-100: #E9E7EE;
$base-200: #D2CFDD;
$base-300: #B1ADC3;
$base-400: #918BA7;
$base-500: #726B89;
$base-600: #5B566B;
$base-700: #44414E;
$base-800: #2E2C35;
$base-900: #1D1C21;
$base-hover: #342F43;
$base-subtle: #C4C1CF;

{
    "color": {
        "base": {
            "value": "#403B53",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F6F9",
                "type": "color"
            },
            "100": {
                "value": "#E9E7EE",
                "type": "color"
            },
            "200": {
                "value": "#D2CFDD",
                "type": "color"
            },
            "300": {
                "value": "#B1ADC3",
                "type": "color"
            },
            "400": {
                "value": "#918BA7",
                "type": "color"
            },
            "500": {
                "value": "#726B89",
                "type": "color"
            },
            "600": {
                "value": "#5B566B",
                "type": "color"
            },
            "700": {
                "value": "#44414E",
                "type": "color"
            },
            "800": {
                "value": "#2E2C35",
                "type": "color"
            },
            "900": {
                "value": "#1D1C21",
                "type": "color"
            }
        }
    }
}