What color is #174E5A?

#174E5A is a dark cyan. In RGB it is rgb(23, 78, 90), and in HSL hsl(191, 59%, 22%).

Is #174E5A accessible as text?

On white, #174E5A has a contrast ratio of 9.24:1 (passes WCAG AA for body text); on black it is 2.27:1 (fails). For text placed on #174E5A, use white for the best readability.

What is the closest Tailwind color to #174E5A?

The nearest Tailwind CSS token is cyan-900 (#104E64).

What colors go well with #174E5A?

#174E5A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #592317. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #174E5A below.

Is #174E5A good for buttons?

#174E5A works well for buttons and highlights, but use white text on #174E5A — black text only reaches 2.27:1, below the 4.5:1 needed for normal-size labels.

Is #174E5A the same as CSS darkslategray?

No — #174E5A is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#174E5A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #174E5A

Not just a swatch — here's how #174E5A works with other colors. Named schemes with #174E5A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #174E5A Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1E3549

Dark Slate 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 #174E5A Secondary #AEB4B8 Surface #F1F2F0 Support #7B94A5 Anchor #2E3236

Dark Slate 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 #174E5A Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #416F7B

Dark Slate 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 Dark Slate Gray.

Vintage Leather Lead · 5 colors

Lead #174E5A Secondary #705116 Surface #E3DCC0 Accent #395143 Anchor #56233E

Dark Slate 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 #174E5A Secondary #607075 Support #969386 Ink #16140F

Dark Slate 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 Dark Slate Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #174E5A 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 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 2/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 39/100

Low

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 23/100

Low

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

UI accent fit 56/100

Moderate

Workable accent with care around contrast.

Surface fit 41/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #174E5A

For UI

For branding

For interior

For fashion

People also use #174E5A with

Pine Green Prussian Blue Rosewood 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 9.2:1. Use

Subtle surface Use #C6E2E8 for cards and hover fills. Tint 80

Avoid beside #173759 — 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 #174E5A 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: #174E5A;
  --color-base-rgb: 23 78 90;
  --color-base-oklch: oklch(39.4% 0.059 215.2);
  --color-50: #F2FAFC;
  --color-100: #DEF3F7;
  --color-200: #BEE5EE;
  --color-300: #92D0DE;
  --color-400: #68B8CA;
  --color-500: #469BAE;
  --color-600: #3C7886;
  --color-700: #30565F;
  --color-800: #22393F;
  --color-900: #172427;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F2FAFC',
    100: '#DEF3F7',
    200: '#BEE5EE',
    300: '#92D0DE',
    400: '#68B8CA',
    500: '#469BAE',
    600: '#3C7886',
    700: '#30565F',
    800: '#22393F',
    900: '#172427',
  },
}

$base: #174E5A;
$base-ink: #FFFFFF;
$base-50: #F2FAFC;
$base-100: #DEF3F7;
$base-200: #BEE5EE;
$base-300: #92D0DE;
$base-400: #68B8CA;
$base-500: #469BAE;
$base-600: #3C7886;
$base-700: #30565F;
$base-800: #22393F;
$base-900: #172427;
$base-hover: #123E47;
$base-subtle: #A9D4DE;

{
    "color": {
        "base": {
            "value": "#174E5A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FAFC",
                "type": "color"
            },
            "100": {
                "value": "#DEF3F7",
                "type": "color"
            },
            "200": {
                "value": "#BEE5EE",
                "type": "color"
            },
            "300": {
                "value": "#92D0DE",
                "type": "color"
            },
            "400": {
                "value": "#68B8CA",
                "type": "color"
            },
            "500": {
                "value": "#469BAE",
                "type": "color"
            },
            "600": {
                "value": "#3C7886",
                "type": "color"
            },
            "700": {
                "value": "#30565F",
                "type": "color"
            },
            "800": {
                "value": "#22393F",
                "type": "color"
            },
            "900": {
                "value": "#172427",
                "type": "color"
            }
        }
    }
}

Palettes built on #174E5A

Color Lab

Pairs with #174E5A

UI roles & guardrails

In real applications

Scales

Every model

Export