What color is #03542E?

#03542E is a very dark, vivid teal-green. In RGB it is rgb(3, 84, 46), and in HSL hsl(152, 93%, 17%).

Is #03542E accessible as text?

On white, #03542E has a contrast ratio of 9.09:1 (passes WCAG AA for body text); on black it is 2.31:1 (fails). For text placed on #03542E, use white for the best readability.

What is the closest Tailwind color to #03542E?

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

What colors go well with #03542E?

#03542E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #540329. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03542E below.

Is #03542E good for buttons?

#03542E works well for buttons and highlights, but use white text on #03542E — black text only reaches 2.31:1, below the 4.5:1 needed for normal-size labels.

Is #03542E the same as CSS darkslategray?

No — #03542E 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.

#03542E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03542E

Not just a swatch — here's how #03542E works with other colors. Named schemes with #03542E in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #03542E Secondary #4A6C3D 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.

Coastal Morning Lead · 5 colors

Lead #03542E Accent #A8C4BB Surface #E1D9BE Secondary #9AA0A0 Anchor #1A3648

Castleton Green opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Vintage Leather Lead · 5 colors

Lead #03542E Secondary #744E1B 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.

Berry & Cream Lead · 5 colors

Lead #03542E Surface #F0E8D6 Anchor #612028 Accent #E5C4B9 Secondary #342B2C

Castleton Green sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #03542E Secondary #5E7264 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 #03542E 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 43/100

Neutral

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 60/100

High

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

Naturalness 91/100

Very 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 66/100

High

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

Brand distinctiveness 26/100

Low

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

UI accent fit 66/100

High

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

Surface fit 31/100

Low

Usable as a tinted surface in measured doses.

Print safety 80/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #03542E

For UI

For branding

For interior

For fashion

People also use #03542E with

Green Dark Slate Gray Oxblood 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 9.1:1. Use

Subtle surface Use #B8F1D7 for cards and hover fills. Tint 80

Avoid beside #035449 — 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 #03542E 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: #03542E;
  --color-base-rgb: 3 84 46;
  --color-base-oklch: oklch(39.2% 0.095 155.1);
  --color-50: #F0FEF8;
  --color-100: #D8FDEC;
  --color-200: #B1FCD9;
  --color-300: #7CF4BC;
  --color-400: #4CE69E;
  --color-500: #29CC80;
  --color-600: #279B65;
  --color-700: #226D4A;
  --color-800: #1A4732;
  --color-900: #122B1F;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F0FEF8',
    100: '#D8FDEC',
    200: '#B1FCD9',
    300: '#7CF4BC',
    400: '#4CE69E',
    500: '#29CC80',
    600: '#279B65',
    700: '#226D4A',
    800: '#1A4732',
    900: '#122B1F',
  },
}

$base: #03542E;
$base-ink: #FFFFFF;
$base-50: #F0FEF8;
$base-100: #D8FDEC;
$base-200: #B1FCD9;
$base-300: #7CF4BC;
$base-400: #4CE69E;
$base-500: #29CC80;
$base-600: #279B65;
$base-700: #226D4A;
$base-800: #1A4732;
$base-900: #122B1F;
$base-hover: #024325;
$base-subtle: #93ECC2;

{
    "color": {
        "base": {
            "value": "#03542E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEF8",
                "type": "color"
            },
            "100": {
                "value": "#D8FDEC",
                "type": "color"
            },
            "200": {
                "value": "#B1FCD9",
                "type": "color"
            },
            "300": {
                "value": "#7CF4BC",
                "type": "color"
            },
            "400": {
                "value": "#4CE69E",
                "type": "color"
            },
            "500": {
                "value": "#29CC80",
                "type": "color"
            },
            "600": {
                "value": "#279B65",
                "type": "color"
            },
            "700": {
                "value": "#226D4A",
                "type": "color"
            },
            "800": {
                "value": "#1A4732",
                "type": "color"
            },
            "900": {
                "value": "#122B1F",
                "type": "color"
            }
        }
    }
}

Palettes built on #03542E

Color Lab

Pairs with #03542E

UI roles & guardrails

In real applications

Scales

Every model

Export