What color is #403B09?

#403B09 is a very dark, vivid yellow. In RGB it is rgb(64, 59, 9), and in HSL hsl(55, 75%, 14%).

Is #403B09 accessible as text?

On white, #403B09 has a contrast ratio of 11.37:1 (passes WCAG AA for body text); on black it is 1.85:1 (fails). For text placed on #403B09, use white for the best readability.

What is the closest Tailwind color to #403B09?

The nearest Tailwind CSS token is olive-700 (#474739).

What colors go well with #403B09?

#403B09 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #090D3E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #403B09 below.

Is #403B09 good for buttons?

#403B09 works well for buttons and highlights, but use white text on #403B09 — black text only reaches 1.85:1, below the 4.5:1 needed for normal-size labels.

Is #403B09 the same as CSS darkslategray?

No — #403B09 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.

#403B09 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #403B09

Not just a swatch — here's how #403B09 works with other colors. Named schemes with #403B09 in its natural role, and a note on why the supporting colors balance it.

Warm Autumn Interior Dominant · 5 colors

Dominant #403B09 Secondary #B1680B Accent #6E7A48 Surface #F3ECDD Anchor #3A2B1F

This palette keeps Espresso 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 #403B09 Secondary #784C1F Surface #E7DAC0 Accent #3F513E Anchor #5B2226

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

Botanical Studio Lead · 5 colors

Lead #403B09 Secondary #536A36 Accent #B1680B Surface #F0E9D6 Anchor #3D2F21

Espresso leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Desert Clay Center · 5 colors

Center #403B09 Surface #DFCFA8 Secondary #AD7C51 Accent #909971 Anchor #3D2D1F

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

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #403B09 Secondary #626051 Support #999186 Ink #17140F

Espresso 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 Espresso carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #403B09 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 62/100

Neutral

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

High

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

Naturalness 66/100

High

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

Vintage feel 56/100

Moderate

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 67/100

High

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

Brand distinctiveness 26/100

Low

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

UI accent fit 45/100

Moderate

Workable accent with care around contrast.

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 89/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #403B09

For UI

For branding

For interior

For fashion

People also use #403B09 with

Espresso British Racing Green Navy Greige Army Green

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 11.4:1. Use

Subtle surface Use #EBE7BB for cards and hover fills. Tint 80

Avoid beside #313E09 — 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 #403B09 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: #403B09;
  --color-base-rgb: 64 59 9;
  --color-base-oklch: oklch(34.7% 0.067 103.4);
  --color-50: #FEFDF1;
  --color-100: #FBF8DA;
  --color-200: #F5F0B8;
  --color-300: #E8E087;
  --color-400: #D7CD5B;
  --color-500: #BCB138;
  --color-600: #908832;
  --color-700: #666129;
  --color-800: #423F1E;
  --color-900: #292714;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  espresso: {
    50: '#FEFDF1',
    100: '#FBF8DA',
    200: '#F5F0B8',
    300: '#E8E087',
    400: '#D7CD5B',
    500: '#BCB138',
    600: '#908832',
    700: '#666129',
    800: '#423F1E',
    900: '#292714',
  },
}

$base: #403B09;
$base-ink: #FFFFFF;
$base-50: #FEFDF1;
$base-100: #FBF8DA;
$base-200: #F5F0B8;
$base-300: #E8E087;
$base-400: #D7CD5B;
$base-500: #BCB138;
$base-600: #908832;
$base-700: #666129;
$base-800: #423F1E;
$base-900: #292714;
$base-hover: #322E07;
$base-subtle: #E3DC98;

{
    "color": {
        "base": {
            "value": "#403B09",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FEFDF1",
                "type": "color"
            },
            "100": {
                "value": "#FBF8DA",
                "type": "color"
            },
            "200": {
                "value": "#F5F0B8",
                "type": "color"
            },
            "300": {
                "value": "#E8E087",
                "type": "color"
            },
            "400": {
                "value": "#D7CD5B",
                "type": "color"
            },
            "500": {
                "value": "#BCB138",
                "type": "color"
            },
            "600": {
                "value": "#908832",
                "type": "color"
            },
            "700": {
                "value": "#666129",
                "type": "color"
            },
            "800": {
                "value": "#423F1E",
                "type": "color"
            },
            "900": {
                "value": "#292714",
                "type": "color"
            }
        }
    }
}

Palettes built on #403B09

Color Lab

Pairs with #403B09

UI roles & guardrails

In real applications

Scales

Every model

Export