What color is #305A5A?

#305A5A is a dark, muted cyan. In RGB it is rgb(48, 90, 90), and in HSL hsl(180, 30%, 27%).

Is #305A5A accessible as text?

On white, #305A5A has a contrast ratio of 7.68:1 (passes WCAG AA for body text); on black it is 2.74:1 (fails). For text placed on #305A5A, use white for the best readability.

What is the closest Tailwind color to #305A5A?

The nearest Tailwind CSS token is teal-800 (#005F5A).

What colors go well with #305A5A?

#305A5A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5A3030. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #305A5A below.

Is #305A5A good for buttons?

#305A5A works well for buttons and highlights, but use white text on #305A5A — black text only reaches 2.74:1, below the 4.5:1 needed for normal-size labels.

Is #305A5A the same as CSS darkslategray?

No — #305A5A is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#305A5A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #305A5A

Not just a swatch — here's how #305A5A works with other colors. Named schemes with #305A5A in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #305A5A Accent #A6C4BD Surface #E0DABE Secondary #9AA0A0 Anchor #1D3549

Dark Slate Gray 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 #305A5A Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A4 Anchor #2E3236

Dark Slate Gray 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 #305A5A Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #552340

Dark Slate Gray 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 #305A5A Anchor #382C1E Surface #ECE4D0 Accent #809C72 Secondary #3A3933

Dark Slate Gray 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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #305A5A Secondary #6F7D7C Support #979286 Ink #16140F

Dark Slate Gray 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 Dark Slate Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #305A5A 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 38/100

Neutral

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

Softness 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 54/100

Moderate

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

Naturalness 9/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

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

Brand distinctiveness 18/100

Very low

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

UI accent fit 60/100

High

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

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #305A5A

For UI

For branding

For interior

For fashion

People also use #305A5A with

Fern Green Charcoal Espresso 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 7.7:1. Use

Subtle surface Use #D2E2E2 for cards and hover fills. Tint 80

Avoid beside #304C5A — 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 #305A5A 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: #305A5A;
  --color-base-rgb: 48 90 90;
  --color-base-oklch: oklch(43.7% 0.047 195.6);
  --color-50: #F5FAFA;
  --color-100: #E4F1F1;
  --color-200: #CAE2E2;
  --color-300: #A4CBCB;
  --color-400: #80B2B2;
  --color-500: #609595;
  --color-600: #4E7474;
  --color-700: #3B5454;
  --color-800: #293838;
  --color-900: #1B2323;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F5FAFA',
    100: '#E4F1F1',
    200: '#CAE2E2',
    300: '#A4CBCB',
    400: '#80B2B2',
    500: '#609595',
    600: '#4E7474',
    700: '#3B5454',
    800: '#293838',
    900: '#1B2323',
  },
}

$base: #305A5A;
$base-ink: #FFFFFF;
$base-50: #F5FAFA;
$base-100: #E4F1F1;
$base-200: #CAE2E2;
$base-300: #A4CBCB;
$base-400: #80B2B2;
$base-500: #609595;
$base-600: #4E7474;
$base-700: #3B5454;
$base-800: #293838;
$base-900: #1B2323;
$base-hover: #274848;
$base-subtle: #BAD4D4;

{
    "color": {
        "base": {
            "value": "#305A5A",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5FAFA",
                "type": "color"
            },
            "100": {
                "value": "#E4F1F1",
                "type": "color"
            },
            "200": {
                "value": "#CAE2E2",
                "type": "color"
            },
            "300": {
                "value": "#A4CBCB",
                "type": "color"
            },
            "400": {
                "value": "#80B2B2",
                "type": "color"
            },
            "500": {
                "value": "#609595",
                "type": "color"
            },
            "600": {
                "value": "#4E7474",
                "type": "color"
            },
            "700": {
                "value": "#3B5454",
                "type": "color"
            },
            "800": {
                "value": "#293838",
                "type": "color"
            },
            "900": {
                "value": "#1B2323",
                "type": "color"
            }
        }
    }
}

Palettes built on #305A5A

Color Lab

Pairs with #305A5A

UI roles & guardrails

In real applications

Scales

Every model

Export