What color is #175B6E?

#175B6E is a dark cyan. In RGB it is rgb(23, 91, 110), and in HSL hsl(193, 65%, 26%).

Is #175B6E accessible as text?

On white, #175B6E has a contrast ratio of 7.61:1 (passes WCAG AA for body text); on black it is 2.76:1 (fails). For text placed on #175B6E, use white for the best readability.

What is the closest Tailwind color to #175B6E?

The nearest Tailwind CSS token is cyan-800 (#005F78).

What colors go well with #175B6E?

#175B6E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #6D2A17. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #175B6E below.

Is #175B6E good for buttons?

#175B6E works well for buttons and highlights, but use white text on #175B6E — black text only reaches 2.76:1, below the 4.5:1 needed for normal-size labels.

Is #175B6E the same as CSS darkslategray?

No — #175B6E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#175B6E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #175B6E

Not just a swatch — here's how #175B6E works with other colors. Named schemes with #175B6E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #175B6E Accent #A6C4BF Surface #DFDABF Secondary #9AA0A0 Anchor #1E354A

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 #175B6E Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A5 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 #175B6E Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #467D8F

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 #175B6E Secondary #705116 Surface #E2DCC0 Accent #385244 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 #175B6E Secondary #6A7E85 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 #175B6E 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 29/100

Cool

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 55/100

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 46/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 60/100

Moderate

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 71/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 35/100

Low

Usable as a tinted surface in measured doses.

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #175B6E

For UI

For branding

For interior

For fashion

People also use #175B6E with

Sea Green Yale Blue Wine Red 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 7.6:1. Use

Subtle surface Use #C8E3EB for cards and hover fills. Tint 80

Avoid beside #173E6D — 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 #175B6E 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: #175B6E;
  --color-base-rgb: 23 91 110;
  --color-base-oklch: oklch(43.9% 0.072 221.0);
  --color-50: #F2FAFD;
  --color-100: #DDF3F9;
  --color-200: #BCE5F1;
  --color-300: #8ECFE2;
  --color-400: #63B7CF;
  --color-500: #419BB4;
  --color-600: #387889;
  --color-700: #2D5662;
  --color-800: #213940;
  --color-900: #162427;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F2FAFD',
    100: '#DDF3F9',
    200: '#BCE5F1',
    300: '#8ECFE2',
    400: '#63B7CF',
    500: '#419BB4',
    600: '#387889',
    700: '#2D5662',
    800: '#213940',
    900: '#162427',
  },
}

$base: #175B6E;
$base-ink: #FFFFFF;
$base-50: #F2FAFD;
$base-100: #DDF3F9;
$base-200: #BCE5F1;
$base-300: #8ECFE2;
$base-400: #63B7CF;
$base-500: #419BB4;
$base-600: #387889;
$base-700: #2D5662;
$base-800: #213940;
$base-900: #162427;
$base-hover: #134958;
$base-subtle: #AAD6E2;

{
    "color": {
        "base": {
            "value": "#175B6E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FAFD",
                "type": "color"
            },
            "100": {
                "value": "#DDF3F9",
                "type": "color"
            },
            "200": {
                "value": "#BCE5F1",
                "type": "color"
            },
            "300": {
                "value": "#8ECFE2",
                "type": "color"
            },
            "400": {
                "value": "#63B7CF",
                "type": "color"
            },
            "500": {
                "value": "#419BB4",
                "type": "color"
            },
            "600": {
                "value": "#387889",
                "type": "color"
            },
            "700": {
                "value": "#2D5662",
                "type": "color"
            },
            "800": {
                "value": "#213940",
                "type": "color"
            },
            "900": {
                "value": "#162427",
                "type": "color"
            }
        }
    }
}

Palettes built on #175B6E

Color Lab

Pairs with #175B6E

UI roles & guardrails

In real applications

Scales

Every model

Export