What color is #17523B?

#17523B is a dark teal-green. In RGB it is rgb(23, 82, 59), and in HSL hsl(157, 56%, 21%).

Is #17523B accessible as text?

On white, #17523B has a contrast ratio of 9.10:1 (passes WCAG AA for body text); on black it is 2.31:1 (fails). For text placed on #17523B, use white for the best readability.

What is the closest Tailwind color to #17523B?

The nearest Tailwind CSS token is emerald-900 (#004F3B).

What colors go well with #17523B?

#17523B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #54182F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #17523B below.

Is #17523B good for buttons?

#17523B works well for buttons and highlights, but use white text on #17523B — black text only reaches 2.31:1, below the 4.5:1 needed for normal-size labels.

Is #17523B the same as CSS darkslategray?

No — #17523B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#17523B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #17523B

Not just a swatch — here's how #17523B works with other colors. Named schemes with #17523B in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #17523B Secondary #496C3E Accent #AB6D00 Surface #EEEAD6 Anchor #3C2F20

Castleton Green leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Coastal Morning Lead · 5 colors

Lead #17523B Accent #A7C4BB Surface #E1D9BE Secondary #9AA0A0 Anchor #1B3548

Castleton Green 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 #17523B Secondary #ADB4B7 Surface #F1F2F0 Support #7895A3 Anchor #2D3236

Castleton Green keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #17523B Secondary #744F1A Surface #E5DBC0 Accent #3B5141 Anchor #5B2320

Castleton Green 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 #F7F4EF Accent #17523B Secondary #607269 Support #989286 Ink #17140F

Castleton Green 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 Castleton Green carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #17523B 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 41/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 59/100

Moderate

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

Naturalness 61/100

High

Organic, earthy character — at home in wellness, food and craft brands.

Vintage feel 50/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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

Brand distinctiveness 20/100

Very low

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

UI accent fit 60/100

High

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

Surface fit 37/100

Low

Usable as a tinted surface in measured doses.

Print safety 86/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #17523B

For UI

For branding

For interior

For fashion

People also use #17523B with

Green Charcoal Tyrian Purple 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 9.1:1. Use

Subtle surface Use #C6E7DB for cards and hover fills. Tint 80

Avoid beside #185451 — 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 #17523B 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: #17523B;
  --color-base-rgb: 23 82 59;
  --color-base-oklch: oklch(39.4% 0.072 163.4);
  --color-50: #F3FCF8;
  --color-100: #DFF7ED;
  --color-200: #BFEDDC;
  --color-300: #93DCC0;
  --color-400: #6BC7A4;
  --color-500: #49AC86;
  --color-600: #3E8469;
  --color-700: #315E4D;
  --color-800: #233E34;
  --color-900: #172620;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F3FCF8',
    100: '#DFF7ED',
    200: '#BFEDDC',
    300: '#93DCC0',
    400: '#6BC7A4',
    500: '#49AC86',
    600: '#3E8469',
    700: '#315E4D',
    800: '#233E34',
    900: '#172620',
  },
}

$base: #17523B;
$base-ink: #FFFFFF;
$base-50: #F3FCF8;
$base-100: #DFF7ED;
$base-200: #BFEDDC;
$base-300: #93DCC0;
$base-400: #6BC7A4;
$base-500: #49AC86;
$base-600: #3E8469;
$base-700: #315E4D;
$base-800: #233E34;
$base-900: #172620;
$base-hover: #134330;
$base-subtle: #A9DCC9;

{
    "color": {
        "base": {
            "value": "#17523B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FCF8",
                "type": "color"
            },
            "100": {
                "value": "#DFF7ED",
                "type": "color"
            },
            "200": {
                "value": "#BFEDDC",
                "type": "color"
            },
            "300": {
                "value": "#93DCC0",
                "type": "color"
            },
            "400": {
                "value": "#6BC7A4",
                "type": "color"
            },
            "500": {
                "value": "#49AC86",
                "type": "color"
            },
            "600": {
                "value": "#3E8469",
                "type": "color"
            },
            "700": {
                "value": "#315E4D",
                "type": "color"
            },
            "800": {
                "value": "#233E34",
                "type": "color"
            },
            "900": {
                "value": "#172620",
                "type": "color"
            }
        }
    }
}

Palettes built on #17523B

Color Lab

Pairs with #17523B

UI roles & guardrails

In real applications

Scales

Every model

Export