What color is #04553B?

#04553B is a very dark, vivid teal-green. In RGB it is rgb(4, 85, 59), and in HSL hsl(161, 91%, 17%).

Is #04553B accessible as text?

On white, #04553B has a contrast ratio of 8.87:1 (passes WCAG AA for body text); on black it is 2.37:1 (fails). For text placed on #04553B, use white for the best readability.

What is the closest Tailwind color to #04553B?

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

What colors go well with #04553B?

#04553B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #53041D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #04553B below.

Is #04553B good for buttons?

#04553B works well for buttons and highlights, but use white text on #04553B — black text only reaches 2.37:1, below the 4.5:1 needed for normal-size labels.

Is #04553B the same as CSS darkslategray?

No — #04553B 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.

#04553B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #04553B

Not just a swatch — here's how #04553B works with other colors. Named schemes with #04553B in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #04553B 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 #04553B Accent #A7C4BB Surface #E1D9BE Secondary #9AA0A0 Anchor #1B3548

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 #04553B 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 #04553B 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 #04553B Secondary #5F746A 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 #04553B 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 40/100

Neutral

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

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 59/100

Moderate

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

Naturalness 66/100

High

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

Vintage feel 54/100

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 23/100

Low

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

UI accent fit 65/100

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 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #04553B

For UI

For branding

For interior

For fashion

People also use #04553B with

Green Prussian Blue 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 8.9:1. Use

Subtle surface Use #B9F0DF for cards and hover fills. Tint 80

Avoid beside #045153 — 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 #04553B at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #04553B;
  --color-base-rgb: 4 85 59;
  --color-base-oklch: oklch(39.9% 0.083 164.0);
  --color-50: #F0FEFA;
  --color-100: #D8FDF1;
  --color-200: #B1FBE4;
  --color-300: #7DF2CD;
  --color-400: #4EE4B5;
  --color-500: #2ACB98;
  --color-600: #289A76;
  --color-700: #236C55;
  --color-800: #1B4638;
  --color-900: #122B23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  castleton-green: {
    50: '#F0FEFA',
    100: '#D8FDF1',
    200: '#B1FBE4',
    300: '#7DF2CD',
    400: '#4EE4B5',
    500: '#2ACB98',
    600: '#289A76',
    700: '#236C55',
    800: '#1B4638',
    900: '#122B23',
  },
}

$base: #04553B;
$base-ink: #FFFFFF;
$base-50: #F0FEFA;
$base-100: #D8FDF1;
$base-200: #B1FBE4;
$base-300: #7DF2CD;
$base-400: #4EE4B5;
$base-500: #2ACB98;
$base-600: #289A76;
$base-700: #236C55;
$base-800: #1B4638;
$base-900: #122B23;
$base-hover: #03422E;
$base-subtle: #94EBD0;

{
    "color": {
        "base": {
            "value": "#04553B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEFA",
                "type": "color"
            },
            "100": {
                "value": "#D8FDF1",
                "type": "color"
            },
            "200": {
                "value": "#B1FBE4",
                "type": "color"
            },
            "300": {
                "value": "#7DF2CD",
                "type": "color"
            },
            "400": {
                "value": "#4EE4B5",
                "type": "color"
            },
            "500": {
                "value": "#2ACB98",
                "type": "color"
            },
            "600": {
                "value": "#289A76",
                "type": "color"
            },
            "700": {
                "value": "#236C55",
                "type": "color"
            },
            "800": {
                "value": "#1B4638",
                "type": "color"
            },
            "900": {
                "value": "#122B23",
                "type": "color"
            }
        }
    }
}

Palettes built on #04553B

Color Lab

Pairs with #04553B

UI roles & guardrails

In real applications

Scales

Every model

Export