What color is #175139?

#175139 is a dark teal-green. In RGB it is rgb(23, 81, 57), and in HSL hsl(155, 56%, 20%).

Is #175139 accessible as text?

On white, #175139 has a contrast ratio of 9.24:1 (passes WCAG AA for body text); on black it is 2.27:1 (fails). For text placed on #175139, use white for the best readability.

What is the closest Tailwind color to #175139?

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

What colors go well with #175139?

#175139 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #50162E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #175139 below.

Is #175139 good for buttons?

#175139 works well for buttons and highlights, but use white text on #175139 — black text only reaches 2.27:1, below the 4.5:1 needed for normal-size labels.

Is #175139 the same as CSS darkslategray?

No — #175139 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.

#175139 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #175139

Not just a swatch — here's how #175139 works with other colors. Named schemes with #175139 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #175139 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 #175139 Accent #A7C4BB Surface #E1D9BE Secondary #9AA0A0 Anchor #1B3648

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 #175139 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 #175139 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 #175139 Secondary #5F7167 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 #175139 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 42/100

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 64/100

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 59/100

Moderate

Workable accent with care around contrast.

Surface fit 38/100

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 #175139

For UI

For branding

For interior

For fashion

People also use #175139 with

Dark 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 9.2:1. Use

Subtle surface Use #C6E7D9 for cards and hover fills. Tint 80

Avoid beside #16504B — 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 #175139 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: #175139;
  --color-base-rgb: 23 81 57;
  --color-base-oklch: oklch(39.0% 0.073 162.1);
  --color-50: #F3FCF8;
  --color-100: #DFF7ED;
  --color-200: #BFEDDA;
  --color-300: #93DCBE;
  --color-400: #6BC7A1;
  --color-500: #49AC83;
  --color-600: #3E8467;
  --color-700: #315E4B;
  --color-800: #233E33;
  --color-900: #172620;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F3FCF8',
    100: '#DFF7ED',
    200: '#BFEDDA',
    300: '#93DCBE',
    400: '#6BC7A1',
    500: '#49AC83',
    600: '#3E8467',
    700: '#315E4B',
    800: '#233E33',
    900: '#172620',
  },
}

$base: #175139;
$base-ink: #FFFFFF;
$base-50: #F3FCF8;
$base-100: #DFF7ED;
$base-200: #BFEDDA;
$base-300: #93DCBE;
$base-400: #6BC7A1;
$base-500: #49AC83;
$base-600: #3E8467;
$base-700: #315E4B;
$base-800: #233E33;
$base-900: #172620;
$base-hover: #12402D;
$base-subtle: #A8DCC6;

{
    "color": {
        "base": {
            "value": "#175139",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FCF8",
                "type": "color"
            },
            "100": {
                "value": "#DFF7ED",
                "type": "color"
            },
            "200": {
                "value": "#BFEDDA",
                "type": "color"
            },
            "300": {
                "value": "#93DCBE",
                "type": "color"
            },
            "400": {
                "value": "#6BC7A1",
                "type": "color"
            },
            "500": {
                "value": "#49AC83",
                "type": "color"
            },
            "600": {
                "value": "#3E8467",
                "type": "color"
            },
            "700": {
                "value": "#315E4B",
                "type": "color"
            },
            "800": {
                "value": "#233E33",
                "type": "color"
            },
            "900": {
                "value": "#172620",
                "type": "color"
            }
        }
    }
}

Palettes built on #175139

Color Lab

Pairs with #175139

UI roles & guardrails

In real applications

Scales

Every model

Export