What color is #143D45?

#143D45 is a very dark cyan. In RGB it is rgb(20, 61, 69), and in HSL hsl(190, 55%, 17%).

Is #143D45 accessible as text?

On white, #143D45 has a contrast ratio of 11.78:1 (passes WCAG AA for body text); on black it is 1.78:1 (fails). For text placed on #143D45, use white for the best readability.

What is the closest Tailwind color to #143D45?

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

What colors go well with #143D45?

#143D45 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #431B14. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #143D45 below.

Is #143D45 good for buttons?

#143D45 works well for buttons and highlights, but use white text on #143D45 — black text only reaches 1.78:1, below the 4.5:1 needed for normal-size labels.

Is #143D45 the same as CSS darkslategray?

No — #143D45 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#143D45 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #143D45

Not just a swatch — here's how #143D45 works with other colors. Named schemes with #143D45 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #143D45 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 #143D45 Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 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 #143D45 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #3A5D65

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 #143D45 Secondary #705117 Surface #E3DCC0 Accent #395143 Anchor #56233F

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 #143D45 Secondary #525F62 Support #979286 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 #143D45 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 37/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 64/100

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 32/100

Low

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 18/100

Very low

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

UI accent fit 36/100

Low

Workable accent with care around contrast.

Surface fit 49/100

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 #143D45

For UI

For branding

For interior

For fashion

People also use #143D45 with

Hunter 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 11.8:1. Use

Subtle surface Use #C4E0E5 for cards and hover fills. Tint 80

Avoid beside #142B43 — 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 #143D45 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: #143D45;
  --color-base-rgb: 20 61 69;
  --color-base-oklch: oklch(33.5% 0.047 212.7);
  --color-50: #F3FAFC;
  --color-100: #DFF3F6;
  --color-200: #C0E5ED;
  --color-300: #94CFDB;
  --color-400: #6BB7C7;
  --color-500: #4A9BAB;
  --color-600: #3F7883;
  --color-700: #31565E;
  --color-800: #23393E;
  --color-900: #172426;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F3FAFC',
    100: '#DFF3F6',
    200: '#C0E5ED',
    300: '#94CFDB',
    400: '#6BB7C7',
    500: '#4A9BAB',
    600: '#3F7883',
    700: '#31565E',
    800: '#23393E',
    900: '#172426',
  },
}

$base: #143D45;
$base-ink: #FFFFFF;
$base-50: #F3FAFC;
$base-100: #DFF3F6;
$base-200: #C0E5ED;
$base-300: #94CFDB;
$base-400: #6BB7C7;
$base-500: #4A9BAB;
$base-600: #3F7883;
$base-700: #31565E;
$base-800: #23393E;
$base-900: #172426;
$base-hover: #102F36;
$base-subtle: #A5D1DA;

{
    "color": {
        "base": {
            "value": "#143D45",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FAFC",
                "type": "color"
            },
            "100": {
                "value": "#DFF3F6",
                "type": "color"
            },
            "200": {
                "value": "#C0E5ED",
                "type": "color"
            },
            "300": {
                "value": "#94CFDB",
                "type": "color"
            },
            "400": {
                "value": "#6BB7C7",
                "type": "color"
            },
            "500": {
                "value": "#4A9BAB",
                "type": "color"
            },
            "600": {
                "value": "#3F7883",
                "type": "color"
            },
            "700": {
                "value": "#31565E",
                "type": "color"
            },
            "800": {
                "value": "#23393E",
                "type": "color"
            },
            "900": {
                "value": "#172426",
                "type": "color"
            }
        }
    }
}