What color is #1B4F4E?

#1B4F4E is a dark cyan. In RGB it is rgb(27, 79, 78), and in HSL hsl(179, 49%, 21%).

Is #1B4F4E accessible as text?

On white, #1B4F4E has a contrast ratio of 9.23:1 (passes WCAG AA for body text); on black it is 2.28:1 (fails). For text placed on #1B4F4E, use white for the best readability.

What is the closest Tailwind color to #1B4F4E?

The nearest Tailwind CSS token is teal-900 (#0B4F4A).

What colors go well with #1B4F4E?

#1B4F4E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #501B1C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1B4F4E below.

Is #1B4F4E good for buttons?

#1B4F4E works well for buttons and highlights, but use white text on #1B4F4E — black text only reaches 2.28:1, below the 4.5:1 needed for normal-size labels.

Is #1B4F4E the same as CSS darkslategray?

No — #1B4F4E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#1B4F4E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1B4F4E

Not just a swatch — here's how #1B4F4E works with other colors. Named schemes with #1B4F4E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #1B4F4E Accent #A7C4BD Surface #E0DABE Secondary #9AA0A0 Anchor #1C3549

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 #1B4F4E 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 #1B4F4E 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 #1B4F4E Anchor #382B1E 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 #1B4F4E Secondary #607070 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 #1B4F4E 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 37/100

Cool

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

Softness 38/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

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

Naturalness 11/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 40/100

Low

A faint retro warmth without tipping into sepia.

Luxury 62/100

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 53/100

Moderate

Workable accent with care around contrast.

Surface fit 43/100

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 #1B4F4E

For UI

For branding

For interior

For fashion

People also use #1B4F4E with

Hunter 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 9.2:1. Use

Subtle surface Use #C8E5E4 for cards and hover fills. Tint 80

Avoid beside #1B3F50 — 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 #1B4F4E 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: #1B4F4E;
  --color-base-rgb: 27 79 78;
  --color-base-oklch: oklch(39.3% 0.054 193.4);
  --color-50: #F3FBFB;
  --color-100: #E0F5F5;
  --color-200: #C2EAE9;
  --color-300: #98D7D6;
  --color-400: #70C2C0;
  --color-500: #4FA6A4;
  --color-600: #427F7E;
  --color-700: #345B5B;
  --color-800: #253C3C;
  --color-900: #182525;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F3FBFB',
    100: '#E0F5F5',
    200: '#C2EAE9',
    300: '#98D7D6',
    400: '#70C2C0',
    500: '#4FA6A4',
    600: '#427F7E',
    700: '#345B5B',
    800: '#253C3C',
    900: '#182525',
  },
}

$base: #1B4F4E;
$base-ink: #FFFFFF;
$base-50: #F3FBFB;
$base-100: #E0F5F5;
$base-200: #C2EAE9;
$base-300: #98D7D6;
$base-400: #70C2C0;
$base-500: #4FA6A4;
$base-600: #427F7E;
$base-700: #345B5B;
$base-800: #253C3C;
$base-900: #182525;
$base-hover: #16403F;
$base-subtle: #ACD9D8;

{
    "color": {
        "base": {
            "value": "#1B4F4E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FBFB",
                "type": "color"
            },
            "100": {
                "value": "#E0F5F5",
                "type": "color"
            },
            "200": {
                "value": "#C2EAE9",
                "type": "color"
            },
            "300": {
                "value": "#98D7D6",
                "type": "color"
            },
            "400": {
                "value": "#70C2C0",
                "type": "color"
            },
            "500": {
                "value": "#4FA6A4",
                "type": "color"
            },
            "600": {
                "value": "#427F7E",
                "type": "color"
            },
            "700": {
                "value": "#345B5B",
                "type": "color"
            },
            "800": {
                "value": "#253C3C",
                "type": "color"
            },
            "900": {
                "value": "#182525",
                "type": "color"
            }
        }
    }
}

Palettes built on #1B4F4E

Color Lab

Pairs with #1B4F4E

UI roles & guardrails

In real applications

Scales

Every model

Export