What color is #10373A?

#10373A is a very dark cyan. In RGB it is rgb(16, 55, 58), and in HSL hsl(184, 57%, 15%).

Is #10373A accessible as text?

On white, #10373A has a contrast ratio of 12.89:1 (passes WCAG AA for body text); on black it is 1.63:1 (fails). For text placed on #10373A, use white for the best readability.

What is the closest Tailwind color to #10373A?

The nearest Tailwind CSS token is cyan-950 (#053345).

What colors go well with #10373A?

#10373A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3C1310. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #10373A below.

Is #10373A good for buttons?

#10373A works well for buttons and highlights, but use white text on #10373A — black text only reaches 1.63:1, below the 4.5:1 needed for normal-size labels.

Is #10373A the same as CSS darkslategray?

No — #10373A is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#10373A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #10373A

Not just a swatch — here's how #10373A works with other colors. Named schemes with #10373A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #10373A Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1D3549

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 #10373A Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 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.

Tech Product Signal · 5 colors

Signal #10373A Surface #14161A Highlight #F4F6F8 Secondary #596771 Accent #355759

Bottle Green is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Bottle Green.

Vintage Leather Lead · 5 colors

Lead #10373A Secondary #715017 Surface #E3DCC0 Accent #395143 Anchor #552340

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #10373A Secondary #4C5859 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 #10373A 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 32/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

High

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

Naturalness 5/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 17/100

Very low

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

UI accent fit 30/100

Low

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

Surface fit 52/100

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 #10373A

For UI

For branding

For interior

For fashion

People also use #10373A with

Castleton 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 12.9:1. Use

Subtle surface Use #C2E3E5 for cards and hover fills. Tint 80

Avoid beside #102B3C — 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 #10373A 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: #10373A;
  --color-base-rgb: 16 55 58;
  --color-base-oklch: oklch(31.1% 0.043 202.3);
  --color-50: #F3FBFC;
  --color-100: #DEF5F7;
  --color-200: #BFEAED;
  --color-300: #93D7DC;
  --color-400: #6AC2C8;
  --color-500: #48A6AD;
  --color-600: #3D8084;
  --color-700: #305B5E;
  --color-800: #233C3E;
  --color-900: #172526;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  bottle-green: {
    50: '#F3FBFC',
    100: '#DEF5F7',
    200: '#BFEAED',
    300: '#93D7DC',
    400: '#6AC2C8',
    500: '#48A6AD',
    600: '#3D8084',
    700: '#305B5E',
    800: '#233C3E',
    900: '#172526',
  },
}

$base: #10373A;
$base-ink: #FFFFFF;
$base-50: #F3FBFC;
$base-100: #DEF5F7;
$base-200: #BFEAED;
$base-300: #93D7DC;
$base-400: #6AC2C8;
$base-500: #48A6AD;
$base-600: #3D8084;
$base-700: #305B5E;
$base-800: #233C3E;
$base-900: #172526;
$base-hover: #0D2E30;
$base-subtle: #A2D6DA;

{
    "color": {
        "base": {
            "value": "#10373A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FBFC",
                "type": "color"
            },
            "100": {
                "value": "#DEF5F7",
                "type": "color"
            },
            "200": {
                "value": "#BFEAED",
                "type": "color"
            },
            "300": {
                "value": "#93D7DC",
                "type": "color"
            },
            "400": {
                "value": "#6AC2C8",
                "type": "color"
            },
            "500": {
                "value": "#48A6AD",
                "type": "color"
            },
            "600": {
                "value": "#3D8084",
                "type": "color"
            },
            "700": {
                "value": "#305B5E",
                "type": "color"
            },
            "800": {
                "value": "#233C3E",
                "type": "color"
            },
            "900": {
                "value": "#172526",
                "type": "color"
            }
        }
    }
}