What color is #10403B?

#10403B is a very dark teal. In RGB it is rgb(16, 64, 59), and in HSL hsl(174, 60%, 16%).

Is #10403B accessible as text?

On white, #10403B has a contrast ratio of 11.55:1 (passes WCAG AA for body text); on black it is 1.82:1 (fails). For text placed on #10403B, use white for the best readability.

What is the closest Tailwind color to #10403B?

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

What colors go well with #10403B?

#10403B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #411015. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #10403B below.

Is #10403B good for buttons?

#10403B works well for buttons and highlights, but use white text on #10403B — black text only reaches 1.82:1, below the 4.5:1 needed for normal-size labels.

Is #10403B the same as CSS darkslategray?

No — #10403B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#10403B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #10403B

Not just a swatch — here's how #10403B works with other colors. Named schemes with #10403B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #10403B 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 #10403B 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 #10403B Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #5B241E

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 #10403B 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 #10403B Secondary #52615E 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 #10403B 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 39/100

Neutral

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

High

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

Naturalness 17/100

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 20/100

Very low

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

UI accent fit 38/100

Low

Workable accent with care around contrast.

Surface fit 47/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #10403B

For UI

For branding

For interior

For fashion

People also use #10403B with

Hunter Green Prussian Blue 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 11.5:1. Use

Subtle surface Use #C2E7E3 for cards and hover fills. Tint 80

Avoid beside #103641 — 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 #10403B 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: #10403B;
  --color-base-rgb: 16 64 59;
  --color-base-oklch: oklch(33.8% 0.051 185.2);
  --color-50: #F2FCFB;
  --color-100: #DEF8F5;
  --color-200: #BEEFEA;
  --color-300: #91DED7;
  --color-400: #67CBC1;
  --color-500: #46AFA5;
  --color-600: #3C867F;
  --color-700: #2F605B;
  --color-800: #223F3C;
  --color-900: #162725;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  bottle-green: {
    50: '#F2FCFB',
    100: '#DEF8F5',
    200: '#BEEFEA',
    300: '#91DED7',
    400: '#67CBC1',
    500: '#46AFA5',
    600: '#3C867F',
    700: '#2F605B',
    800: '#223F3C',
    900: '#162725',
  },
}

$base: #10403B;
$base-ink: #FFFFFF;
$base-50: #F2FCFB;
$base-100: #DEF8F5;
$base-200: #BEEFEA;
$base-300: #91DED7;
$base-400: #67CBC1;
$base-500: #46AFA5;
$base-600: #3C867F;
$base-700: #2F605B;
$base-800: #223F3C;
$base-900: #162725;
$base-hover: #0D3430;
$base-subtle: #A1DCD6;

{
    "color": {
        "base": {
            "value": "#10403B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FCFB",
                "type": "color"
            },
            "100": {
                "value": "#DEF8F5",
                "type": "color"
            },
            "200": {
                "value": "#BEEFEA",
                "type": "color"
            },
            "300": {
                "value": "#91DED7",
                "type": "color"
            },
            "400": {
                "value": "#67CBC1",
                "type": "color"
            },
            "500": {
                "value": "#46AFA5",
                "type": "color"
            },
            "600": {
                "value": "#3C867F",
                "type": "color"
            },
            "700": {
                "value": "#2F605B",
                "type": "color"
            },
            "800": {
                "value": "#223F3C",
                "type": "color"
            },
            "900": {
                "value": "#162725",
                "type": "color"
            }
        }
    }
}