What color is #033F54?

#033F54 is a very dark, vivid cyan-blue. In RGB it is rgb(3, 63, 84), and in HSL hsl(196, 93%, 17%).

Is #033F54 accessible as text?

On white, #033F54 has a contrast ratio of 11.40:1 (passes WCAG AA for body text); on black it is 1.84:1 (fails). For text placed on #033F54, use white for the best readability.

What is the closest Tailwind color to #033F54?

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

What colors go well with #033F54?

#033F54 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #541903. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #033F54 below.

Is #033F54 good for buttons?

#033F54 works well for buttons and highlights, but use white text on #033F54 — black text only reaches 1.84:1, below the 4.5:1 needed for normal-size labels.

Is #033F54 the same as CSS darkslategray?

No — #033F54 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#033F54 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #033F54

Not just a swatch — here's how #033F54 works with other colors. Named schemes with #033F54 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #033F54 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Prussian Blue 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 #033F54 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Prussian Blue 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 #033F54 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #326074

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

Vintage Leather Lead · 5 colors

Lead #033F54 Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

Prussian Blue 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 #033F54 Secondary #526269 Support #969386 Ink #16140F

Prussian Blue 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 Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #033F54 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 30/100

Cool

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

Softness 33/100

Low

Middle-weight — neither delicate nor heavy.

Depth 64/100

High

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 67/100

High

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

Brand distinctiveness 25/100

Low

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

UI accent fit 44/100

Moderate

Workable accent with care around contrast.

Surface fit 43/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #033F54

For UI

For branding

For interior

For fashion

People also use #033F54 with

Pine Green Navy 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 11.4:1. Use

Subtle surface Use #B8E2F1 for cards and hover fills. Tint 80

Avoid beside #032354 — 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 #033F54 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: #033F54;
  --color-base-rgb: 3 63 84;
  --color-base-oklch: oklch(34.4% 0.066 228.8);
  --color-50: #F0FBFE;
  --color-100: #D8F3FD;
  --color-200: #B1E8FC;
  --color-300: #7CD4F4;
  --color-400: #4CBDE6;
  --color-500: #29A1CC;
  --color-600: #277C9B;
  --color-700: #22596D;
  --color-800: #1A3B47;
  --color-900: #12242B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F0FBFE',
    100: '#D8F3FD',
    200: '#B1E8FC',
    300: '#7CD4F4',
    400: '#4CBDE6',
    500: '#29A1CC',
    600: '#277C9B',
    700: '#22596D',
    800: '#1A3B47',
    900: '#12242B',
  },
}

$base: #033F54;
$base-ink: #FFFFFF;
$base-50: #F0FBFE;
$base-100: #D8F3FD;
$base-200: #B1E8FC;
$base-300: #7CD4F4;
$base-400: #4CBDE6;
$base-500: #29A1CC;
$base-600: #277C9B;
$base-700: #22596D;
$base-800: #1A3B47;
$base-900: #12242B;
$base-hover: #023243;
$base-subtle: #93D4EC;

{
    "color": {
        "base": {
            "value": "#033F54",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FBFE",
                "type": "color"
            },
            "100": {
                "value": "#D8F3FD",
                "type": "color"
            },
            "200": {
                "value": "#B1E8FC",
                "type": "color"
            },
            "300": {
                "value": "#7CD4F4",
                "type": "color"
            },
            "400": {
                "value": "#4CBDE6",
                "type": "color"
            },
            "500": {
                "value": "#29A1CC",
                "type": "color"
            },
            "600": {
                "value": "#277C9B",
                "type": "color"
            },
            "700": {
                "value": "#22596D",
                "type": "color"
            },
            "800": {
                "value": "#1A3B47",
                "type": "color"
            },
            "900": {
                "value": "#12242B",
                "type": "color"
            }
        }
    }
}