What color is #12573B?

#12573B is a dark teal-green. In RGB it is rgb(18, 87, 59), and in HSL hsl(156, 66%, 21%).

Is #12573B accessible as text?

On white, #12573B has a contrast ratio of 8.56:1 (passes WCAG AA for body text); on black it is 2.45:1 (fails). For text placed on #12573B, use white for the best readability.

What is the closest Tailwind color to #12573B?

The nearest Tailwind CSS token is green-900 (#0D542B).

What colors go well with #12573B?

#12573B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #59122E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #12573B below.

Is #12573B good for buttons?

#12573B works well for buttons and highlights, but use white text on #12573B — black text only reaches 2.45:1, below the 4.5:1 needed for normal-size labels.

Is #12573B the same as CSS darkslategray?

No — #12573B 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.

#12573B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #12573B

Not just a swatch — here's how #12573B works with other colors. Named schemes with #12573B in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #12573B Secondary #496C3E Accent #AC6D00 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 #12573B 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 #12573B 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 #12573B Secondary #744E1A 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 #12573B Secondary #63766B 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 #12573B 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 58/100

Moderate

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

Naturalness 71/100

High

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

Vintage feel 55/100

Moderate

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 63/100

High

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

Brand distinctiveness 22/100

Low

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

UI accent fit 67/100

High

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

Surface fit 34/100

Low

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #12573B

For UI

For branding

For interior

For fashion

People also use #12573B with

Green Dark Slate Gray Tyrian Purple Platinum

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 8.6:1. Use

Subtle surface Use #C4EADB for cards and hover fills. Tint 80

Avoid beside #125954 — 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 #12573B 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: #12573B;
  --color-base-rgb: 18 87 59;
  --color-base-oklch: oklch(40.7% 0.082 161.2);
  --color-50: #F2FDF8;
  --color-100: #DCF9ED;
  --color-200: #BBF1DC;
  --color-300: #8DE2C0;
  --color-400: #62D0A4;
  --color-500: #40B586;
  --color-600: #388A69;
  --color-700: #2D624D;
  --color-800: #214034;
  --color-900: #162820;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F2FDF8',
    100: '#DCF9ED',
    200: '#BBF1DC',
    300: '#8DE2C0',
    400: '#62D0A4',
    500: '#40B586',
    600: '#388A69',
    700: '#2D624D',
    800: '#214034',
    900: '#162820',
  },
}

$base: #12573B;
$base-ink: #FFFFFF;
$base-50: #F2FDF8;
$base-100: #DCF9ED;
$base-200: #BBF1DC;
$base-300: #8DE2C0;
$base-400: #62D0A4;
$base-500: #40B586;
$base-600: #388A69;
$base-700: #2D624D;
$base-800: #214034;
$base-900: #162820;
$base-hover: #0F4730;
$base-subtle: #A4E1C9;

{
    "color": {
        "base": {
            "value": "#12573B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FDF8",
                "type": "color"
            },
            "100": {
                "value": "#DCF9ED",
                "type": "color"
            },
            "200": {
                "value": "#BBF1DC",
                "type": "color"
            },
            "300": {
                "value": "#8DE2C0",
                "type": "color"
            },
            "400": {
                "value": "#62D0A4",
                "type": "color"
            },
            "500": {
                "value": "#40B586",
                "type": "color"
            },
            "600": {
                "value": "#388A69",
                "type": "color"
            },
            "700": {
                "value": "#2D624D",
                "type": "color"
            },
            "800": {
                "value": "#214034",
                "type": "color"
            },
            "900": {
                "value": "#162820",
                "type": "color"
            }
        }
    }
}

Palettes built on #12573B

Color Lab

Pairs with #12573B

UI roles & guardrails

In real applications

Scales

Every model

Export