What color is #033B45?

#033B45 is a very dark, vivid cyan. In RGB it is rgb(3, 59, 69), and in HSL hsl(189, 92%, 14%).

Is #033B45 accessible as text?

On white, #033B45 has a contrast ratio of 12.24:1 (passes WCAG AA for body text); on black it is 1.72:1 (fails). For text placed on #033B45, use white for the best readability.

What is the closest Tailwind color to #033B45?

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

What colors go well with #033B45?

#033B45 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #450D03. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #033B45 below.

Is #033B45 good for buttons?

#033B45 works well for buttons and highlights, but use white text on #033B45 — black text only reaches 1.72:1, below the 4.5:1 needed for normal-size labels.

Is #033B45 the same as CSS darkslategray?

No — #033B45 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#033B45 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #033B45

Not just a swatch — here's how #033B45 works with other colors. Named schemes with #033B45 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #033B45 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 #033B45 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 #033B45 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #305B64

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 #033B45 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 #033B45 Secondary #4D5C60 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.

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Color Lab

How #033B45 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 34/100

Cool

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 65/100

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 33/100

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 21/100

Low

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

UI accent fit 36/100

Low

Workable accent with care around contrast.

Surface fit 47/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 85/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #033B45

For UI

For branding

For interior

For fashion

People also use #033B45 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 12.2:1. Use

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

Avoid beside #032545 — 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 #033B45 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: #033B45;
  --color-base-rgb: 3 59 69;
  --color-base-oklch: oklch(32.4% 0.055 213.6);
  --color-50: #F0FCFE;
  --color-100: #D8F8FD;
  --color-200: #B1F0FC;
  --color-300: #7CE1F3;
  --color-400: #4DCEE5;
  --color-500: #29B3CB;
  --color-600: #28899A;
  --color-700: #22616D;
  --color-800: #1A4047;
  --color-900: #12272B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  gunmetal-gray: {
    50: '#F0FCFE',
    100: '#D8F8FD',
    200: '#B1F0FC',
    300: '#7CE1F3',
    400: '#4DCEE5',
    500: '#29B3CB',
    600: '#28899A',
    700: '#22616D',
    800: '#1A4047',
    900: '#12272B',
  },
}

$base: #033B45;
$base-ink: #FFFFFF;
$base-50: #F0FCFE;
$base-100: #D8F8FD;
$base-200: #B1F0FC;
$base-300: #7CE1F3;
$base-400: #4DCEE5;
$base-500: #29B3CB;
$base-600: #28899A;
$base-700: #22616D;
$base-800: #1A4047;
$base-900: #12272B;
$base-hover: #022F37;
$base-subtle: #8FDDEB;

{
    "color": {
        "base": {
            "value": "#033B45",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FCFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F8FD",
                "type": "color"
            },
            "200": {
                "value": "#B1F0FC",
                "type": "color"
            },
            "300": {
                "value": "#7CE1F3",
                "type": "color"
            },
            "400": {
                "value": "#4DCEE5",
                "type": "color"
            },
            "500": {
                "value": "#29B3CB",
                "type": "color"
            },
            "600": {
                "value": "#28899A",
                "type": "color"
            },
            "700": {
                "value": "#22616D",
                "type": "color"
            },
            "800": {
                "value": "#1A4047",
                "type": "color"
            },
            "900": {
                "value": "#12272B",
                "type": "color"
            }
        }
    }
}