What color is #400403?

#400403 is a very dark, vivid red. In RGB it is rgb(64, 4, 3), and in HSL hsl(1, 91%, 13%).

Is #400403 accessible as text?

On white, #400403 has a contrast ratio of 16.98:1 (passes WCAG AA for body text); on black it is 1.24:1 (fails). For text placed on #400403, use white for the best readability.

What is the closest Tailwind color to #400403?

The nearest Tailwind CSS token is red-950 (#460809).

What colors go well with #400403?

#400403 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #033E3F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #400403 below.

Is #400403 good for buttons?

#400403 works well for buttons and highlights, but use white text on #400403 — black text only reaches 1.24:1, below the 4.5:1 needed for normal-size labels.

Is #400403 the same as CSS maroon?

No — #400403 is not the CSS named color maroon, but maroon (#800000) is the closest CSS named color.

#400403 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #400403

Not just a swatch — here's how #400403 works with other colors. Named schemes with #400403 in its natural role, and a note on why the supporting colors balance it.

Warm Autumn Interior Dominant · 5 colors

Dominant #400403 Secondary #B76325 Accent #777743 Surface #F4EBDD Anchor #3B2A21

This palette keeps Oxblood as the dominant warm neutral, balanced by muted terracotta and olive earth tones and grounded by a deep espresso anchor.

Vintage Leather Lead · 5 colors

Lead #400403 Secondary #7B4927 Surface #EAD9C0 Accent #43503A Anchor #5A222E

Oxblood plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Desert Clay Center · 5 colors

Center #400403 Surface #E3CEA8 Secondary #B17958 Accent #98976D Anchor #3E2C21

Oxblood holds the warm center of this desert palette with sand and clay beside it, a muted-sage accent and a dark-brown anchor.

Japanese Sand Base · 5 colors

Base #400403 Surface #F0E9DC Highlight #F7F1E7 Secondary #BBAEA0 Ink #2B2723

Oxblood 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.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #400403 Secondary #523C38 Support #9B9186 Ink #17140F

Oxblood 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 Oxblood carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #400403 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 75/100

Warm

Reads warm and advancing — inviting, energetic, draws the eye forward.

Softness 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 75/100

High

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

Naturalness 93/100

Very high

Organic, earthy character — at home in wellness, food and craft brands.

Vintage feel 52/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 78/100

High

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

Brand distinctiveness 35/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 21/100

Low

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

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #400403

For UI

For branding

For interior

For fashion

People also use #400403 with

Tyrian Purple Bistre Bottle Green Gainsboro Espresso

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 17.0:1. Use

Subtle surface Use #F0B7B6 for cards and hover fills. Tint 80

Avoid beside #3F1803 — 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 #400403 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: #400403;
  --color-base-rgb: 64 4 3;
  --color-base-oklch: oklch(23.9% 0.090 28.5);
  --color-50: #FEF1F0;
  --color-100: #FDD8D8;
  --color-200: #FBB2B1;
  --color-300: #F27F7D;
  --color-400: #E4504E;
  --color-500: #CB2D2A;
  --color-600: #9A2A28;
  --color-700: #6C2423;
  --color-800: #461B1B;
  --color-900: #2B1312;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  oxblood: {
    50: '#FEF1F0',
    100: '#FDD8D8',
    200: '#FBB2B1',
    300: '#F27F7D',
    400: '#E4504E',
    500: '#CB2D2A',
    600: '#9A2A28',
    700: '#6C2423',
    800: '#461B1B',
    900: '#2B1312',
  },
}

$base: #400403;
$base-ink: #FFFFFF;
$base-50: #FEF1F0;
$base-100: #FDD8D8;
$base-200: #FBB2B1;
$base-300: #F27F7D;
$base-400: #E4504E;
$base-500: #CB2D2A;
$base-600: #9A2A28;
$base-700: #6C2423;
$base-800: #461B1B;
$base-900: #2B1312;
$base-hover: #330302;
$base-subtle: #EA908E;

{
    "color": {
        "base": {
            "value": "#400403",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FEF1F0",
                "type": "color"
            },
            "100": {
                "value": "#FDD8D8",
                "type": "color"
            },
            "200": {
                "value": "#FBB2B1",
                "type": "color"
            },
            "300": {
                "value": "#F27F7D",
                "type": "color"
            },
            "400": {
                "value": "#E4504E",
                "type": "color"
            },
            "500": {
                "value": "#CB2D2A",
                "type": "color"
            },
            "600": {
                "value": "#9A2A28",
                "type": "color"
            },
            "700": {
                "value": "#6C2423",
                "type": "color"
            },
            "800": {
                "value": "#461B1B",
                "type": "color"
            },
            "900": {
                "value": "#2B1312",
                "type": "color"
            }
        }
    }
}