What color is #153447?

#153447 is a dark cyan-blue. In RGB it is rgb(21, 52, 71), and in HSL hsl(203, 54%, 18%).

Is #153447 accessible as text?

On white, #153447 has a contrast ratio of 13.01:1 (passes WCAG AA for body text); on black it is 1.61:1 (fails). For text placed on #153447, use white for the best readability.

What is the closest Tailwind color to #153447?

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

What colors go well with #153447?

#153447 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #472815. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #153447 below.

Is #153447 good for buttons?

#153447 works well for buttons and highlights, but use white text on #153447 — black text only reaches 1.61:1, below the 4.5:1 needed for normal-size labels.

Is #153447 the same as CSS darkslategray?

No — #153447 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#153447 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #153447

Not just a swatch — here's how #153447 works with other colors. Named schemes with #153447 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #153447 Accent #A6C4C0 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 #153447 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 #153447 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #385466

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 #153447 Secondary #7F4439 Surface #E2DDC0 Accent #385245 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 #153447 Secondary #4D575E 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 #153447 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 66/100

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 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 19/100

Very low

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

UI accent fit 31/100

Low

Workable accent with care around contrast.

Surface fit 50/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #153447

For UI

For branding

For interior

For fashion

People also use #153447 with

Hunter 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 13.0:1. Use

Subtle surface Use #C5D9E5 for cards and hover fills. Tint 80

Avoid beside #152347 — 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 #153447 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: #153447;
  --color-base-rgb: 21 52 71;
  --color-base-oklch: oklch(31.1% 0.050 238.2);
  --color-50: #F3F8FC;
  --color-100: #DFEDF6;
  --color-200: #C0DBEC;
  --color-300: #95C0DA;
  --color-400: #6CA3C6;
  --color-500: #4B85AA;
  --color-600: #3F6983;
  --color-700: #324C5D;
  --color-800: #23333D;
  --color-900: #172026;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F3F8FC',
    100: '#DFEDF6',
    200: '#C0DBEC',
    300: '#95C0DA',
    400: '#6CA3C6',
    500: '#4B85AA',
    600: '#3F6983',
    700: '#324C5D',
    800: '#23333D',
    900: '#172026',
  },
}

$base: #153447;
$base-ink: #FFFFFF;
$base-50: #F3F8FC;
$base-100: #DFEDF6;
$base-200: #C0DBEC;
$base-300: #95C0DA;
$base-400: #6CA3C6;
$base-500: #4B85AA;
$base-600: #3F6983;
$base-700: #324C5D;
$base-800: #23333D;
$base-900: #172026;
$base-hover: #112939;
$base-subtle: #A7C6DA;

{
    "color": {
        "base": {
            "value": "#153447",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FC",
                "type": "color"
            },
            "100": {
                "value": "#DFEDF6",
                "type": "color"
            },
            "200": {
                "value": "#C0DBEC",
                "type": "color"
            },
            "300": {
                "value": "#95C0DA",
                "type": "color"
            },
            "400": {
                "value": "#6CA3C6",
                "type": "color"
            },
            "500": {
                "value": "#4B85AA",
                "type": "color"
            },
            "600": {
                "value": "#3F6983",
                "type": "color"
            },
            "700": {
                "value": "#324C5D",
                "type": "color"
            },
            "800": {
                "value": "#23333D",
                "type": "color"
            },
            "900": {
                "value": "#172026",
                "type": "color"
            }
        }
    }
}