What color is #09583B?

#09583B is a dark, vivid teal-green. In RGB it is rgb(9, 88, 59), and in HSL hsl(158, 81%, 19%).

Is #09583B accessible as text?

On white, #09583B has a contrast ratio of 8.50:1 (passes WCAG AA for body text); on black it is 2.47:1 (fails). For text placed on #09583B, use white for the best readability.

What is the closest Tailwind color to #09583B?

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

What colors go well with #09583B?

#09583B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #580926. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #09583B below.

Is #09583B good for buttons?

#09583B works well for buttons and highlights, but use white text on #09583B — black text only reaches 2.47:1, below the 4.5:1 needed for normal-size labels.

Is #09583B the same as CSS darkslategray?

No — #09583B 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.

#09583B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #09583B

Not just a swatch — here's how #09583B works with other colors. Named schemes with #09583B in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #09583B 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 #09583B 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 #09583B 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 #09583B 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 #09583B Secondary #62776C 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.

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Color Lab

How #09583B 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 73/100

High

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

Vintage feel 56/100

Moderate

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

Luxury 64/100

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 69/100

High

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

Surface fit 32/100

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 #09583B

For UI

For branding

For interior

For fashion

People also use #09583B with

Green Charcoal Oxblood 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 8.5:1. Use

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

Avoid beside #095855 — 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 #09583B at work across the surfaces designers actually ship.

Website / UI

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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: #09583B;
  --color-base-rgb: 9 88 59;
  --color-base-oklch: oklch(40.9% 0.086 161.7);
  --color-50: #F1FEF9;
  --color-100: #D9FCEF;
  --color-200: #B5F7DF;
  --color-300: #83ECC6;
  --color-400: #56DCAB;
  --color-500: #33C28D;
  --color-600: #2E936E;
  --color-700: #276850;
  --color-800: #1D4436;
  --color-900: #142A22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F1FEF9',
    100: '#D9FCEF',
    200: '#B5F7DF',
    300: '#83ECC6',
    400: '#56DCAB',
    500: '#33C28D',
    600: '#2E936E',
    700: '#276850',
    800: '#1D4436',
    900: '#142A22',
  },
}

$base: #09583B;
$base-ink: #FFFFFF;
$base-50: #F1FEF9;
$base-100: #D9FCEF;
$base-200: #B5F7DF;
$base-300: #83ECC6;
$base-400: #56DCAB;
$base-500: #33C28D;
$base-600: #2E936E;
$base-700: #276850;
$base-800: #1D4436;
$base-900: #142A22;
$base-hover: #07462F;
$base-subtle: #9BE7CB;

{
    "color": {
        "base": {
            "value": "#09583B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEF9",
                "type": "color"
            },
            "100": {
                "value": "#D9FCEF",
                "type": "color"
            },
            "200": {
                "value": "#B5F7DF",
                "type": "color"
            },
            "300": {
                "value": "#83ECC6",
                "type": "color"
            },
            "400": {
                "value": "#56DCAB",
                "type": "color"
            },
            "500": {
                "value": "#33C28D",
                "type": "color"
            },
            "600": {
                "value": "#2E936E",
                "type": "color"
            },
            "700": {
                "value": "#276850",
                "type": "color"
            },
            "800": {
                "value": "#1D4436",
                "type": "color"
            },
            "900": {
                "value": "#142A22",
                "type": "color"
            }
        }
    }
}

Palettes built on #09583B

Color Lab

Pairs with #09583B

UI roles & guardrails

In real applications

Scales

Every model

Export