What color is #174E64?

#174E64 is a dark cyan-blue. In RGB it is rgb(23, 78, 100), and in HSL hsl(197, 63%, 24%).

Is #174E64 accessible as text?

On white, #174E64 has a contrast ratio of 9.09:1 (passes WCAG AA for body text); on black it is 2.31:1 (fails). For text placed on #174E64, use white for the best readability.

What is the closest Tailwind color to #174E64?

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

What colors go well with #174E64?

#174E64 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #642C17. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #174E64 below.

Is #174E64 good for buttons?

#174E64 works well for buttons and highlights, but use white text on #174E64 — black text only reaches 2.31:1, below the 4.5:1 needed for normal-size labels.

Is #174E64 the same as CSS darkslategray?

No — #174E64 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#174E64 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #174E64

Not just a swatch — here's how #174E64 works with other colors. Named schemes with #174E64 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #174E64 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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 #174E64 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 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 #174E64 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #427084

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 #174E64 Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

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 #174E64 Secondary #617179 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 #174E64 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 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 18/100

Very low

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

UI accent fit 60/100

Moderate

Workable accent with care around contrast.

Surface fit 39/100

Low

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 #174E64

For UI

For branding

For interior

For fashion

People also use #174E64 with

Viridian Midnight Blue Espresso 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 9.1:1. Use

Subtle surface Use #C7E0EA for cards and hover fills. Tint 80

Avoid beside #173464 — 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 #174E64 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: #174E64;
  --color-base-rgb: 23 78 100;
  --color-base-oklch: oklch(39.9% 0.067 228.9);
  --color-50: #F2FAFD;
  --color-100: #DDF0F8;
  --color-200: #BDE1F0;
  --color-300: #8FC9E0;
  --color-400: #65B0CD;
  --color-500: #4392B2;
  --color-600: #3A7288;
  --color-700: #2E5261;
  --color-800: #213740;
  --color-900: #162227;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F2FAFD',
    100: '#DDF0F8',
    200: '#BDE1F0',
    300: '#8FC9E0',
    400: '#65B0CD',
    500: '#4392B2',
    600: '#3A7288',
    700: '#2E5261',
    800: '#213740',
    900: '#162227',
  },
}

$base: #174E64;
$base-ink: #FFFFFF;
$base-50: #F2FAFD;
$base-100: #DDF0F8;
$base-200: #BDE1F0;
$base-300: #8FC9E0;
$base-400: #65B0CD;
$base-500: #4392B2;
$base-600: #3A7288;
$base-700: #2E5261;
$base-800: #213740;
$base-900: #162227;
$base-hover: #123E50;
$base-subtle: #A9D1E1;

{
    "color": {
        "base": {
            "value": "#174E64",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FAFD",
                "type": "color"
            },
            "100": {
                "value": "#DDF0F8",
                "type": "color"
            },
            "200": {
                "value": "#BDE1F0",
                "type": "color"
            },
            "300": {
                "value": "#8FC9E0",
                "type": "color"
            },
            "400": {
                "value": "#65B0CD",
                "type": "color"
            },
            "500": {
                "value": "#4392B2",
                "type": "color"
            },
            "600": {
                "value": "#3A7288",
                "type": "color"
            },
            "700": {
                "value": "#2E5261",
                "type": "color"
            },
            "800": {
                "value": "#213740",
                "type": "color"
            },
            "900": {
                "value": "#162227",
                "type": "color"
            }
        }
    }
}

Palettes built on #174E64

Color Lab

Pairs with #174E64

UI roles & guardrails

In real applications

Scales

Every model

Export