What color is #285437?

#285437 is a dark green. In RGB it is rgb(40, 84, 55), and in HSL hsl(140, 35%, 24%).

Is #285437 accessible as text?

On white, #285437 has a contrast ratio of 8.70:1 (passes WCAG AA for body text); on black it is 2.41:1 (fails). For text placed on #285437, use white for the best readability.

What is the closest Tailwind color to #285437?

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

What colors go well with #285437?

#285437 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #532844. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #285437 below.

Is #285437 good for buttons?

#285437 works well for buttons and highlights, but use white text on #285437 — black text only reaches 2.41:1, below the 4.5:1 needed for normal-size labels.

Is #285437 the same as CSS darkslategray?

No — #285437 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.

#285437 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #285437

Not just a swatch — here's how #285437 works with other colors. Named schemes with #285437 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #285437 Secondary #4B6C3D Accent #AC6C00 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.

Vintage Leather Lead · 5 colors

Lead #285437 Secondary #754E1B Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

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 #285437 Anchor #382B1E Surface #EDE4D0 Accent #869B6E 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.

Japanese Sand Base · 5 colors

Base #285437 Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F Ink #2A2723

Castleton Green sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #285437 Secondary #66756A 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 #285437 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 45/100

Neutral

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

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

Naturalness 77/100

High

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

Vintage feel 53/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 63/100

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 62/100

High

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

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 #285437

For UI

For branding

For interior

For fashion

People also use #285437 with

Dark Olive Green Dark Slate Gray Tyrian Purple Platinum Hunter Green

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 8.7:1. Use

Subtle surface Use #CEE2D5 for cards and hover fills. Tint 80

Avoid beside #285344 — 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 #285437 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: #285437;
  --color-base-rgb: 40 84 55;
  --color-base-oklch: oklch(40.6% 0.069 153.2);
  --color-50: #F4FAF6;
  --color-100: #E3F2E8;
  --color-200: #C8E4D1;
  --color-300: #A1CEB0;
  --color-400: #7CB68F;
  --color-500: #5C9970;
  --color-600: #4B775A;
  --color-700: #395643;
  --color-800: #28392E;
  --color-900: #1A231D;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F4FAF6',
    100: '#E3F2E8',
    200: '#C8E4D1',
    300: '#A1CEB0',
    400: '#7CB68F',
    500: '#5C9970',
    600: '#4B775A',
    700: '#395643',
    800: '#28392E',
    900: '#1A231D',
  },
}

$base: #285437;
$base-ink: #FFFFFF;
$base-50: #F4FAF6;
$base-100: #E3F2E8;
$base-200: #C8E4D1;
$base-300: #A1CEB0;
$base-400: #7CB68F;
$base-500: #5C9970;
$base-600: #4B775A;
$base-700: #395643;
$base-800: #28392E;
$base-900: #1A231D;
$base-hover: #20422B;
$base-subtle: #B5D4C0;

{
    "color": {
        "base": {
            "value": "#285437",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FAF6",
                "type": "color"
            },
            "100": {
                "value": "#E3F2E8",
                "type": "color"
            },
            "200": {
                "value": "#C8E4D1",
                "type": "color"
            },
            "300": {
                "value": "#A1CEB0",
                "type": "color"
            },
            "400": {
                "value": "#7CB68F",
                "type": "color"
            },
            "500": {
                "value": "#5C9970",
                "type": "color"
            },
            "600": {
                "value": "#4B775A",
                "type": "color"
            },
            "700": {
                "value": "#395643",
                "type": "color"
            },
            "800": {
                "value": "#28392E",
                "type": "color"
            },
            "900": {
                "value": "#1A231D",
                "type": "color"
            }
        }
    }
}

Palettes built on #285437

Color Lab

Pairs with #285437

UI roles & guardrails

In real applications

Scales

Every model

Export