What color is #143239?

#143239 is a very dark cyan. In RGB it is rgb(20, 50, 57), and in HSL hsl(191, 48%, 15%).

Is #143239 accessible as text?

On white, #143239 has a contrast ratio of 13.59:1 (passes WCAG AA for body text); on black it is 1.55:1 (fails). For text placed on #143239, use white for the best readability.

What is the closest Tailwind color to #143239?

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

What colors go well with #143239?

#143239 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #391B14. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #143239 below.

Is #143239 good for buttons?

#143239 works well for buttons and highlights, but use white text on #143239 — black text only reaches 1.55:1, below the 4.5:1 needed for normal-size labels.

Is #143239 the same as CSS darkslategray?

No — #143239 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#143239 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #143239

Not just a swatch — here's how #143239 works with other colors. Named schemes with #143239 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #143239 Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1E3549

Gunmetal Gray 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 #143239 Secondary #AEB4B8 Surface #F1F2F0 Support #7B94A5 Anchor #2E3236

Gunmetal Gray 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 #143239 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #375158

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

Vintage Leather Lead · 5 colors

Lead #143239 Secondary #705116 Surface #E3DCC0 Accent #395143 Anchor #56233E

Gunmetal Gray 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 #143239 Secondary #4A5456 Support #969386 Ink #16140F

Gunmetal Gray 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 Gunmetal Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #143239 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 31/100

Low

Firm and assertive — carries weight and contrast.

Depth 67/100

High

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

Naturalness 2/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 27/100

Low

A faint retro warmth without tipping into sepia.

Luxury 69/100

High

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

Brand distinctiveness 15/100

Very low

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

UI accent fit 26/100

Low

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

Surface fit 54/100

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 #143239

For UI

For branding

For interior

For fashion

People also use #143239 with

Castleton Green Graphite Bistre 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 13.6:1. Use

Subtle surface Use #C5DDE3 for cards and hover fills. Tint 80

Avoid beside #142639 — 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 #143239 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: #143239;
  --color-base-rgb: 20 50 57;
  --color-base-oklch: oklch(29.8% 0.038 215.1);
  --color-50: #F3FAFB;
  --color-100: #E0F1F5;
  --color-200: #C3E3EA;
  --color-300: #99CBD7;
  --color-400: #71B2C1;
  --color-500: #5095A5;
  --color-600: #43747F;
  --color-700: #34545B;
  --color-800: #25383C;
  --color-900: #182325;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F3FAFB',
    100: '#E0F1F5',
    200: '#C3E3EA',
    300: '#99CBD7',
    400: '#71B2C1',
    500: '#5095A5',
    600: '#43747F',
    700: '#34545B',
    800: '#25383C',
    900: '#182325',
  },
}

$base: #143239;
$base-ink: #FFFFFF;
$base-50: #F3FAFB;
$base-100: #E0F1F5;
$base-200: #C3E3EA;
$base-300: #99CBD7;
$base-400: #71B2C1;
$base-500: #5095A5;
$base-600: #43747F;
$base-700: #34545B;
$base-800: #25383C;
$base-900: #182325;
$base-hover: #10282D;
$base-subtle: #A6CDD6;

{
    "color": {
        "base": {
            "value": "#143239",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FAFB",
                "type": "color"
            },
            "100": {
                "value": "#E0F1F5",
                "type": "color"
            },
            "200": {
                "value": "#C3E3EA",
                "type": "color"
            },
            "300": {
                "value": "#99CBD7",
                "type": "color"
            },
            "400": {
                "value": "#71B2C1",
                "type": "color"
            },
            "500": {
                "value": "#5095A5",
                "type": "color"
            },
            "600": {
                "value": "#43747F",
                "type": "color"
            },
            "700": {
                "value": "#34545B",
                "type": "color"
            },
            "800": {
                "value": "#25383C",
                "type": "color"
            },
            "900": {
                "value": "#182325",
                "type": "color"
            }
        }
    }
}