What color is #17515B?

#17515B is a dark cyan. In RGB it is rgb(23, 81, 91), and in HSL hsl(189, 60%, 22%).

Is #17515B accessible as text?

On white, #17515B has a contrast ratio of 8.88:1 (passes WCAG AA for body text); on black it is 2.36:1 (fails). For text placed on #17515B, use white for the best readability.

What is the closest Tailwind color to #17515B?

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

What colors go well with #17515B?

#17515B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5A2116. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #17515B below.

Is #17515B good for buttons?

#17515B works well for buttons and highlights, but use white text on #17515B — black text only reaches 2.36:1, below the 4.5:1 needed for normal-size labels.

Is #17515B the same as CSS darkslategray?

No — #17515B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#17515B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #17515B

Not just a swatch — here's how #17515B works with other colors. Named schemes with #17515B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #17515B 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 #17515B Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 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 #17515B Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #42727C

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 #17515B Secondary #705117 Surface #E3DCC0 Accent #395143 Anchor #56233F

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 #17515B Secondary #627377 Support #979286 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 #17515B 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 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

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

Naturalness 3/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 40/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 62/100

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 58/100

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 #17515B

For UI

For branding

For interior

For fashion

People also use #17515B with

Fern 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 8.9:1. Use

Subtle surface Use #C6E3E8 for cards and hover fills. Tint 80

Avoid beside #16395A — 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 #17515B at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #17515B;
  --color-base-rgb: 23 81 91;
  --color-base-oklch: oklch(40.3% 0.060 211.4);
  --color-50: #F2FBFC;
  --color-100: #DEF4F8;
  --color-200: #BEE7EF;
  --color-300: #91D3DE;
  --color-400: #67BCCB;
  --color-500: #469FAF;
  --color-600: #3C7B86;
  --color-700: #2F5860;
  --color-800: #223B3F;
  --color-900: #162427;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F2FBFC',
    100: '#DEF4F8',
    200: '#BEE7EF',
    300: '#91D3DE',
    400: '#67BCCB',
    500: '#469FAF',
    600: '#3C7B86',
    700: '#2F5860',
    800: '#223B3F',
    900: '#162427',
  },
}

$base: #17515B;
$base-ink: #FFFFFF;
$base-50: #F2FBFC;
$base-100: #DEF4F8;
$base-200: #BEE7EF;
$base-300: #91D3DE;
$base-400: #67BCCB;
$base-500: #469FAF;
$base-600: #3C7B86;
$base-700: #2F5860;
$base-800: #223B3F;
$base-900: #162427;
$base-hover: #124048;
$base-subtle: #A8D6DF;

{
    "color": {
        "base": {
            "value": "#17515B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FBFC",
                "type": "color"
            },
            "100": {
                "value": "#DEF4F8",
                "type": "color"
            },
            "200": {
                "value": "#BEE7EF",
                "type": "color"
            },
            "300": {
                "value": "#91D3DE",
                "type": "color"
            },
            "400": {
                "value": "#67BCCB",
                "type": "color"
            },
            "500": {
                "value": "#469FAF",
                "type": "color"
            },
            "600": {
                "value": "#3C7B86",
                "type": "color"
            },
            "700": {
                "value": "#2F5860",
                "type": "color"
            },
            "800": {
                "value": "#223B3F",
                "type": "color"
            },
            "900": {
                "value": "#162427",
                "type": "color"
            }
        }
    }
}

Palettes built on #17515B

Color Lab

Pairs with #17515B

UI roles & guardrails

In real applications

Scales

Every model

Export