What color is #15344D?

#15344D is a dark cyan-blue. In RGB it is rgb(21, 52, 77), and in HSL hsl(207, 57%, 19%).

Is #15344D accessible as text?

On white, #15344D has a contrast ratio of 12.88:1 (passes WCAG AA for body text); on black it is 1.63:1 (fails). For text placed on #15344D, use white for the best readability.

What is the closest Tailwind color to #15344D?

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

What colors go well with #15344D?

#15344D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #4C2E15. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #15344D below.

Is #15344D good for buttons?

#15344D works well for buttons and highlights, but use white text on #15344D — black text only reaches 1.63:1, below the 4.5:1 needed for normal-size labels.

Is #15344D the same as CSS darkslategray?

No — #15344D is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#15344D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #15344D

Not just a swatch — here's how #15344D works with other colors. Named schemes with #15344D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #15344D Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A1 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 #15344D 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 #15344D Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #38546C

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 #15344D 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 #15344D Secondary #4D5861 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 #15344D 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 33/100

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 33/100

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 22/100

Low

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

UI accent fit 34/100

Low

Workable accent with care around contrast.

Surface fit 47/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #15344D

For UI

For branding

For interior

For fashion

People also use #15344D with

Pine Green Navy Espresso Gainsboro 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 12.9:1. Use

Subtle surface Use #C5D7E7 for cards and hover fills. Tint 80

Avoid beside #15214C — 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 #15344D 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: #15344D;
  --color-base-rgb: 21 52 77;
  --color-base-oklch: oklch(31.5% 0.058 245.5);
  --color-50: #F3F8FC;
  --color-100: #DEECF7;
  --color-200: #BFD9ED;
  --color-300: #93BBDC;
  --color-400: #6A9EC8;
  --color-500: #487FAD;
  --color-600: #3D6484;
  --color-700: #304A5E;
  --color-800: #23323E;
  --color-900: #171F26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F3F8FC',
    100: '#DEECF7',
    200: '#BFD9ED',
    300: '#93BBDC',
    400: '#6A9EC8',
    500: '#487FAD',
    600: '#3D6484',
    700: '#304A5E',
    800: '#23323E',
    900: '#171F26',
  },
}

$base: #15344D;
$base-ink: #FFFFFF;
$base-50: #F3F8FC;
$base-100: #DEECF7;
$base-200: #BFD9ED;
$base-300: #93BBDC;
$base-400: #6A9EC8;
$base-500: #487FAD;
$base-600: #3D6484;
$base-700: #304A5E;
$base-800: #23323E;
$base-900: #171F26;
$base-hover: #11293D;
$base-subtle: #A6C4DC;

{
    "color": {
        "base": {
            "value": "#15344D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F8FC",
                "type": "color"
            },
            "100": {
                "value": "#DEECF7",
                "type": "color"
            },
            "200": {
                "value": "#BFD9ED",
                "type": "color"
            },
            "300": {
                "value": "#93BBDC",
                "type": "color"
            },
            "400": {
                "value": "#6A9EC8",
                "type": "color"
            },
            "500": {
                "value": "#487FAD",
                "type": "color"
            },
            "600": {
                "value": "#3D6484",
                "type": "color"
            },
            "700": {
                "value": "#304A5E",
                "type": "color"
            },
            "800": {
                "value": "#23323E",
                "type": "color"
            },
            "900": {
                "value": "#171F26",
                "type": "color"
            }
        }
    }
}