What color is #033555?

#033555 is a very dark, vivid cyan-blue. In RGB it is rgb(3, 53, 85), and in HSL hsl(203, 93%, 17%).

Is #033555 accessible as text?

On white, #033555 has a contrast ratio of 12.77:1 (passes WCAG AA for body text); on black it is 1.64:1 (fails). For text placed on #033555, use white for the best readability.

What is the closest Tailwind color to #033555?

The nearest Tailwind CSS token is sky-950 (#052F4A).

What colors go well with #033555?

#033555 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #542203. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #033555 below.

Is #033555 good for buttons?

#033555 works well for buttons and highlights, but use white text on #033555 — black text only reaches 1.64:1, below the 4.5:1 needed for normal-size labels.

Is #033555 the same as CSS midnightblue?

No — #033555 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#033555 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #033555

Not just a swatch — here's how #033555 works with other colors. Named schemes with #033555 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #033555 Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 Anchor #20344A

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 #033555 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 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 #033555 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #2E5674

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 #033555 Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

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 #033555 Secondary #4B5965 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 #033555 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 28/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 67/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 70/100

High

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

Brand distinctiveness 29/100

Low

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

UI accent fit 38/100

Low

Workable accent with care around contrast.

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #033555

For UI

For branding

For interior

For fashion

People also use #033555 with

Pine Green Navy Bistre Platinum Charcoal

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 12.8:1. Use

Subtle surface Use #B8DBF1 for cards and hover fills. Tint 80

Avoid beside #031A54 — 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 #033555 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: #033555;
  --color-base-rgb: 3 53 85;
  --color-base-oklch: oklch(31.7% 0.075 243.8);
  --color-50: #F0F9FE;
  --color-100: #D8EFFD;
  --color-200: #B1DFFC;
  --color-300: #7CC6F4;
  --color-400: #4CABE6;
  --color-500: #298ECC;
  --color-600: #276E9B;
  --color-700: #22506D;
  --color-800: #1A3647;
  --color-900: #12222B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F0F9FE',
    100: '#D8EFFD',
    200: '#B1DFFC',
    300: '#7CC6F4',
    400: '#4CABE6',
    500: '#298ECC',
    600: '#276E9B',
    700: '#22506D',
    800: '#1A3647',
    900: '#12222B',
  },
}

$base: #033555;
$base-ink: #FFFFFF;
$base-50: #F0F9FE;
$base-100: #D8EFFD;
$base-200: #B1DFFC;
$base-300: #7CC6F4;
$base-400: #4CABE6;
$base-500: #298ECC;
$base-600: #276E9B;
$base-700: #22506D;
$base-800: #1A3647;
$base-900: #12222B;
$base-hover: #022A43;
$base-subtle: #93CAEC;

{
    "color": {
        "base": {
            "value": "#033555",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F9FE",
                "type": "color"
            },
            "100": {
                "value": "#D8EFFD",
                "type": "color"
            },
            "200": {
                "value": "#B1DFFC",
                "type": "color"
            },
            "300": {
                "value": "#7CC6F4",
                "type": "color"
            },
            "400": {
                "value": "#4CABE6",
                "type": "color"
            },
            "500": {
                "value": "#298ECC",
                "type": "color"
            },
            "600": {
                "value": "#276E9B",
                "type": "color"
            },
            "700": {
                "value": "#22506D",
                "type": "color"
            },
            "800": {
                "value": "#1A3647",
                "type": "color"
            },
            "900": {
                "value": "#12222B",
                "type": "color"
            }
        }
    }
}