What color is #03353E?

#03353E is a very dark, vivid cyan. In RGB it is rgb(3, 53, 62), and in HSL hsl(189, 91%, 13%).

Is #03353E accessible as text?

On white, #03353E has a contrast ratio of 13.27:1 (passes WCAG AA for body text); on black it is 1.58:1 (fails). For text placed on #03353E, use white for the best readability.

What is the closest Tailwind color to #03353E?

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

What colors go well with #03353E?

#03353E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3F0C03. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03353E below.

Is #03353E good for buttons?

#03353E works well for buttons and highlights, but use white text on #03353E — black text only reaches 1.58:1, below the 4.5:1 needed for normal-size labels.

Is #03353E the same as CSS darkslategray?

No — #03353E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#03353E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03353E

Not just a swatch — here's how #03353E works with other colors. Named schemes with #03353E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #03353E 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 #03353E 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 #03353E Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #2E555D

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 #03353E 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 #03353E Secondary #485659 Support #969286 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 #03353E 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 35/100

Cool

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

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 31/100

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 20/100

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 50/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 86/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #03353E

For UI

For branding

For interior

For fashion

People also use #03353E 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 13.3:1. Use

Subtle surface Use #B6E7F0 for cards and hover fills. Tint 80

Avoid beside #03223F — 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 #03353E 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: #03353E;
  --color-base-rgb: 3 53 62;
  --color-base-oklch: oklch(30.3% 0.051 213.4);
  --color-50: #F0FCFE;
  --color-100: #D8F8FD;
  --color-200: #B1F0FB;
  --color-300: #7DE1F2;
  --color-400: #4ECEE4;
  --color-500: #2AB2CB;
  --color-600: #28899A;
  --color-700: #23616C;
  --color-800: #1B4046;
  --color-900: #12272B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F0FCFE',
    100: '#D8F8FD',
    200: '#B1F0FB',
    300: '#7DE1F2',
    400: '#4ECEE4',
    500: '#2AB2CB',
    600: '#28899A',
    700: '#23616C',
    800: '#1B4046',
    900: '#12272B',
  },
}

$base: #03353E;
$base-ink: #FFFFFF;
$base-50: #F0FCFE;
$base-100: #D8F8FD;
$base-200: #B1F0FB;
$base-300: #7DE1F2;
$base-400: #4ECEE4;
$base-500: #2AB2CB;
$base-600: #28899A;
$base-700: #23616C;
$base-800: #1B4046;
$base-900: #12272B;
$base-hover: #022B33;
$base-subtle: #8EDDEA;

{
    "color": {
        "base": {
            "value": "#03353E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FCFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F8FD",
                "type": "color"
            },
            "200": {
                "value": "#B1F0FB",
                "type": "color"
            },
            "300": {
                "value": "#7DE1F2",
                "type": "color"
            },
            "400": {
                "value": "#4ECEE4",
                "type": "color"
            },
            "500": {
                "value": "#2AB2CB",
                "type": "color"
            },
            "600": {
                "value": "#28899A",
                "type": "color"
            },
            "700": {
                "value": "#23616C",
                "type": "color"
            },
            "800": {
                "value": "#1B4046",
                "type": "color"
            },
            "900": {
                "value": "#12272B",
                "type": "color"
            }
        }
    }
}