What color is #215656?

#215656 is a dark cyan. In RGB it is rgb(33, 86, 86), and in HSL hsl(180, 45%, 23%).

Is #215656 accessible as text?

On white, #215656 has a contrast ratio of 8.30:1 (passes WCAG AA for body text); on black it is 2.53:1 (fails). For text placed on #215656, use white for the best readability.

What is the closest Tailwind color to #215656?

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

What colors go well with #215656?

#215656 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #552020. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #215656 below.

Is #215656 good for buttons?

#215656 works well for buttons and highlights, but use white text on #215656 — black text only reaches 2.53:1, below the 4.5:1 needed for normal-size labels.

Is #215656 the same as CSS darkslategray?

No — #215656 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#215656 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #215656

Not just a swatch — here's how #215656 works with other colors. Named schemes with #215656 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #215656 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 #215656 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 #215656 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 #215656 Anchor #382C1E Surface #ECE4D0 Accent #819C72 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 #215656 Secondary #677877 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.

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Color Lab

How #215656 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 36/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 40/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 56/100

Moderate

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

Naturalness 10/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 60/100

High

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

Brand distinctiveness 21/100

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 41/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 86/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #215656

For UI

For branding

For interior

For fashion

People also use #215656 with

Fern Green Prussian Blue Rosewood 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 8.3:1. Use

Subtle surface Use #CBE4E4 for cards and hover fills. Tint 80

Avoid beside #204355 — 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 #215656 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: #215656;
  --color-base-rgb: 33 86 86;
  --color-base-oklch: oklch(41.8% 0.056 195.2);
  --color-50: #F4FBFB;
  --color-100: #E1F4F4;
  --color-200: #C4E8E8;
  --color-300: #9BD5D5;
  --color-400: #74BEBE;
  --color-500: #53A2A2;
  --color-600: #457D7D;
  --color-700: #355A5A;
  --color-800: #263B3B;
  --color-900: #192525;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F4FBFB',
    100: '#E1F4F4',
    200: '#C4E8E8',
    300: '#9BD5D5',
    400: '#74BEBE',
    500: '#53A2A2',
    600: '#457D7D',
    700: '#355A5A',
    800: '#263B3B',
    900: '#192525',
  },
}

$base: #215656;
$base-ink: #FFFFFF;
$base-50: #F4FBFB;
$base-100: #E1F4F4;
$base-200: #C4E8E8;
$base-300: #9BD5D5;
$base-400: #74BEBE;
$base-500: #53A2A2;
$base-600: #457D7D;
$base-700: #355A5A;
$base-800: #263B3B;
$base-900: #192525;
$base-hover: #1A4444;
$base-subtle: #B0D8D8;

{
    "color": {
        "base": {
            "value": "#215656",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4FBFB",
                "type": "color"
            },
            "100": {
                "value": "#E1F4F4",
                "type": "color"
            },
            "200": {
                "value": "#C4E8E8",
                "type": "color"
            },
            "300": {
                "value": "#9BD5D5",
                "type": "color"
            },
            "400": {
                "value": "#74BEBE",
                "type": "color"
            },
            "500": {
                "value": "#53A2A2",
                "type": "color"
            },
            "600": {
                "value": "#457D7D",
                "type": "color"
            },
            "700": {
                "value": "#355A5A",
                "type": "color"
            },
            "800": {
                "value": "#263B3B",
                "type": "color"
            },
            "900": {
                "value": "#192525",
                "type": "color"
            }
        }
    }
}

Palettes built on #215656

Color Lab

Pairs with #215656

UI roles & guardrails

In real applications

Scales

Every model

Export