What color is #175B4D?

#175B4D is a dark teal. In RGB it is rgb(23, 91, 77), and in HSL hsl(168, 60%, 22%).

Is #175B4D accessible as text?

On white, #175B4D has a contrast ratio of 7.95:1 (passes WCAG AA for body text); on black it is 2.64:1 (fails). For text placed on #175B4D, use white for the best readability.

What is the closest Tailwind color to #175B4D?

The nearest Tailwind CSS token is teal-800 (#005F5A).

What colors go well with #175B4D?

#175B4D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5A1624. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #175B4D below.

Is #175B4D good for buttons?

#175B4D works well for buttons and highlights, but use white text on #175B4D — black text only reaches 2.64:1, below the 4.5:1 needed for normal-size labels.

Is #175B4D the same as CSS darkslategray?

No — #175B4D 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.

#175B4D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #175B4D

Not just a swatch — here's how #175B4D works with other colors. Named schemes with #175B4D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #175B4D Accent #A7C4BC Surface #E0D9BE Secondary #9AA0A0 Anchor #1B3549

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 #175B4D Secondary #ADB4B7 Surface #F1F2F0 Support #7994A4 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 #175B4D Secondary #734F19 Surface #E4DCC0 Accent #3B5141 Anchor #5B231F

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.

Modern Café Dominant · 5 colors

Dominant #175B4D Anchor #382B1E Surface #ECE4D0 Accent #839C70 Secondary #3A3833

Castleton Green anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #175B4D Secondary #677B75 Support #989286 Ink #16140F

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 #175B4D 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 38/100

Cool

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

Softness 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 56/100

Moderate

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

Naturalness 37/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 50/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 61/100

High

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 68/100

High

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

Surface fit 36/100

Low

Usable as a tinted surface in measured doses.

Print safety 85/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #175B4D

For UI

For branding

For interior

For fashion

People also use #175B4D with

Green Charcoal 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 8.0:1. Use

Subtle surface Use #C6E8E2 for cards and hover fills. Tint 80

Avoid beside #16515A — 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 #175B4D 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: #175B4D;
  --color-base-rgb: 23 91 77;
  --color-base-oklch: oklch(42.6% 0.070 175.9);
  --color-50: #F2FCFA;
  --color-100: #DEF8F2;
  --color-200: #BEEFE5;
  --color-300: #91DECF;
  --color-400: #67CBB7;
  --color-500: #46AF9A;
  --color-600: #3C8677;
  --color-700: #2F6056;
  --color-800: #223F39;
  --color-900: #162723;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F2FCFA',
    100: '#DEF8F2',
    200: '#BEEFE5',
    300: '#91DECF',
    400: '#67CBB7',
    500: '#46AF9A',
    600: '#3C8677',
    700: '#2F6056',
    800: '#223F39',
    900: '#162723',
  },
}

$base: #175B4D;
$base-ink: #FFFFFF;
$base-50: #F2FCFA;
$base-100: #DEF8F2;
$base-200: #BEEFE5;
$base-300: #91DECF;
$base-400: #67CBB7;
$base-500: #46AF9A;
$base-600: #3C8677;
$base-700: #2F6056;
$base-800: #223F39;
$base-900: #162723;
$base-hover: #12483D;
$base-subtle: #A8DFD4;

{
    "color": {
        "base": {
            "value": "#175B4D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FCFA",
                "type": "color"
            },
            "100": {
                "value": "#DEF8F2",
                "type": "color"
            },
            "200": {
                "value": "#BEEFE5",
                "type": "color"
            },
            "300": {
                "value": "#91DECF",
                "type": "color"
            },
            "400": {
                "value": "#67CBB7",
                "type": "color"
            },
            "500": {
                "value": "#46AF9A",
                "type": "color"
            },
            "600": {
                "value": "#3C8677",
                "type": "color"
            },
            "700": {
                "value": "#2F6056",
                "type": "color"
            },
            "800": {
                "value": "#223F39",
                "type": "color"
            },
            "900": {
                "value": "#162723",
                "type": "color"
            }
        }
    }
}