What color is #18878F?

#18878F is a dark, vivid cyan. In RGB it is rgb(24, 135, 143), and in HSL hsl(184, 71%, 33%).

Is #18878F accessible as text?

On white, #18878F has a contrast ratio of 4.28:1 (fails WCAG AA for body text); on black it is 4.90:1 (passes). For text placed on #18878F, use black for the best readability.

What is the closest Tailwind color to #18878F?

The nearest Tailwind CSS token is teal-600 (#009689).

What colors go well with #18878F?

#18878F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #902018. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #18878F below.

Is #18878F good for buttons?

#18878F works well for buttons and highlights, but use black text on #18878F — white text only reaches 4.28:1, below the 4.5:1 needed for normal-size labels.

Is #18878F the same as CSS darkcyan?

No — #18878F is not the CSS named color darkcyan, but darkcyan (#008B8B) is the closest CSS named color.

#18878F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #18878F

Not just a swatch — here's how #18878F works with other colors. Named schemes with #18878F in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #18878F Accent #A6C4BE Surface #DFDABE Secondary #9AA0A0 Anchor #1D3549

Dark Cyan 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 #18878F Secondary #AEB4B8 Surface #F1F2F0 Support #7A94A5 Anchor #2E3236

Dark Cyan keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Tech Product Signal · 5 colors

Signal #18878F Surface #14161A Highlight #F4F6F8 Secondary #596771 Accent #56ABB2

Dark Cyan is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Dark Cyan.

Vintage Leather Lead · 5 colors

Lead #18878F Secondary #715017 Surface #E3DCC0 Accent #395143 Anchor #552340

Dark Cyan 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 #F6F4EF Accent #18878F Secondary #8BA8AA Support #979286 Ink #16140F

Dark Cyan 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 Cyan carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #18878F 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 26/100

Cool

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

Softness 49/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 43/100

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 59/100

Moderate

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 50/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 25/100

Low

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

UI accent fit 88/100

Very 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 76/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #18878F

For UI

For branding

For interior

For fashion

People also use #18878F with

Medium Sea Green Classic Blue Cherry Red Platinum Dark Slate Gray

UI roles & guardrails

Primary action Too mid-tone for a filled button — darken for the fill. AA Large

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 4.3:1. Use

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

Avoid beside #186090 — 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 #18878F 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: #18878F;
  --color-base-rgb: 24 135 143;
  --color-base-oklch: oklch(57.0% 0.092 202.6);
  --color-50: #F1FDFD;
  --color-100: #DBF8FA;
  --color-200: #B9EFF3;
  --color-300: #8ADFE5;
  --color-400: #5ECCD4;
  --color-500: #3CB1B9;
  --color-600: #35878D;
  --color-700: #2B6064;
  --color-800: #1F3F42;
  --color-900: #152728;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  dark-cyan: {
    50: '#F1FDFD',
    100: '#DBF8FA',
    200: '#B9EFF3',
    300: '#8ADFE5',
    400: '#5ECCD4',
    500: '#3CB1B9',
    600: '#35878D',
    700: '#2B6064',
    800: '#1F3F42',
    900: '#152728',
  },
}

$base: #18878F;
$base-ink: #141310;
$base-50: #F1FDFD;
$base-100: #DBF8FA;
$base-200: #B9EFF3;
$base-300: #8ADFE5;
$base-400: #5ECCD4;
$base-500: #3CB1B9;
$base-600: #35878D;
$base-700: #2B6064;
$base-800: #1F3F42;
$base-900: #152728;
$base-hover: #146D73;
$base-subtle: #B0E4E7;

{
    "color": {
        "base": {
            "value": "#18878F",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FDFD",
                "type": "color"
            },
            "100": {
                "value": "#DBF8FA",
                "type": "color"
            },
            "200": {
                "value": "#B9EFF3",
                "type": "color"
            },
            "300": {
                "value": "#8ADFE5",
                "type": "color"
            },
            "400": {
                "value": "#5ECCD4",
                "type": "color"
            },
            "500": {
                "value": "#3CB1B9",
                "type": "color"
            },
            "600": {
                "value": "#35878D",
                "type": "color"
            },
            "700": {
                "value": "#2B6064",
                "type": "color"
            },
            "800": {
                "value": "#1F3F42",
                "type": "color"
            },
            "900": {
                "value": "#152728",
                "type": "color"
            }
        }
    }
}

Palettes built on #18878F

Color Lab

Pairs with #18878F

UI roles & guardrails

In real applications

Scales

Every model

Export