What color is #09403B?

#09403B is a very dark, vivid teal. In RGB it is rgb(9, 64, 59), and in HSL hsl(175, 75%, 14%).

Is #09403B accessible as text?

On white, #09403B has a contrast ratio of 11.61:1 (passes WCAG AA for body text); on black it is 1.81:1 (fails). For text placed on #09403B, use white for the best readability.

What is the closest Tailwind color to #09403B?

The nearest Tailwind CSS token is teal-900 (#0B4F4A).

What colors go well with #09403B?

#09403B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3E090D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #09403B below.

Is #09403B good for buttons?

#09403B works well for buttons and highlights, but use white text on #09403B — black text only reaches 1.81:1, below the 4.5:1 needed for normal-size labels.

Is #09403B the same as CSS darkslategray?

No — #09403B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#09403B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #09403B

Not just a swatch — here's how #09403B works with other colors. Named schemes with #09403B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #09403B Accent #A7C4BD Surface #E0DABE Secondary #9AA0A0 Anchor #1C3549

Bottle Green opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #09403B Secondary #AEB4B8 Surface #F1F2F0 Support #7994A4 Anchor #2E3236

Bottle Green keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #09403B Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #5B241D

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

Luxury Packaging Feature · 5 colors

Feature #09403B Anchor #141210 Accent #BAA94D Secondary #1E2C2A Surface #F1EDE3

Bottle Green 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 #09403B Secondary #51605E Support #979286 Ink #16140F

Bottle Green 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 Bottle Green carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #09403B 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 38/100

Neutral

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 64/100

High

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

Naturalness 18/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 21/100

Low

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

UI accent fit 39/100

Low

Workable accent with care around contrast.

Surface fit 47/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #09403B

For UI

For branding

For interior

For fashion

People also use #09403B with

Dark Green Navy Oxblood 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 11.6:1. Use

Subtle surface Use #BBEBE7 for cards and hover fills. Tint 80

Avoid beside #09313E — 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 #09403B 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: #09403B;
  --color-base-rgb: 9 64 59;
  --color-base-oklch: oklch(33.6% 0.055 185.7);
  --color-50: #F1FEFD;
  --color-100: #DAFBF8;
  --color-200: #B8F5F0;
  --color-300: #87E8E0;
  --color-400: #5BD7CD;
  --color-500: #38BCB1;
  --color-600: #329088;
  --color-700: #296661;
  --color-800: #1E423F;
  --color-900: #142927;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  bottle-green: {
    50: '#F1FEFD',
    100: '#DAFBF8',
    200: '#B8F5F0',
    300: '#87E8E0',
    400: '#5BD7CD',
    500: '#38BCB1',
    600: '#329088',
    700: '#296661',
    800: '#1E423F',
    900: '#142927',
  },
}

$base: #09403B;
$base-ink: #FFFFFF;
$base-50: #F1FEFD;
$base-100: #DAFBF8;
$base-200: #B8F5F0;
$base-300: #87E8E0;
$base-400: #5BD7CD;
$base-500: #38BCB1;
$base-600: #329088;
$base-700: #296661;
$base-800: #1E423F;
$base-900: #142927;
$base-hover: #07322E;
$base-subtle: #98E3DC;

{
    "color": {
        "base": {
            "value": "#09403B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEFD",
                "type": "color"
            },
            "100": {
                "value": "#DAFBF8",
                "type": "color"
            },
            "200": {
                "value": "#B8F5F0",
                "type": "color"
            },
            "300": {
                "value": "#87E8E0",
                "type": "color"
            },
            "400": {
                "value": "#5BD7CD",
                "type": "color"
            },
            "500": {
                "value": "#38BCB1",
                "type": "color"
            },
            "600": {
                "value": "#329088",
                "type": "color"
            },
            "700": {
                "value": "#296661",
                "type": "color"
            },
            "800": {
                "value": "#1E423F",
                "type": "color"
            },
            "900": {
                "value": "#142927",
                "type": "color"
            }
        }
    }
}