What color is #0F4E65?

#0F4E65 is a dark, vivid cyan-blue. In RGB it is rgb(15, 78, 101), and in HSL hsl(196, 74%, 23%).

Is #0F4E65 accessible as text?

On white, #0F4E65 has a contrast ratio of 9.14:1 (passes WCAG AA for body text); on black it is 2.30:1 (fails). For text placed on #0F4E65, use white for the best readability.

What is the closest Tailwind color to #0F4E65?

The nearest Tailwind CSS token is cyan-900 (#104E64).

What colors go well with #0F4E65?

#0F4E65 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #66260F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0F4E65 below.

Is #0F4E65 good for buttons?

#0F4E65 works well for buttons and highlights, but use white text on #0F4E65 — black text only reaches 2.30:1, below the 4.5:1 needed for normal-size labels.

Is #0F4E65 the same as CSS darkslategray?

No — #0F4E65 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#0F4E65 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0F4E65

Not just a swatch — here's how #0F4E65 works with other colors. Named schemes with #0F4E65 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0F4E65 Accent #A6C4BF Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

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 #0F4E65 Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 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.

Tech Product Signal · 5 colors

Signal #0F4E65 Surface #14161A Highlight #F4F6F8 Secondary #596672 Accent #3E7085

Dark Slate Gray 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 Slate Gray.

Vintage Leather Lead · 5 colors

Lead #0F4E65 Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #0F4E65 Secondary #5F7179 Support #969386 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 #0F4E65 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 29/100

Cool

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

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 59/100

Moderate

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

Naturalness 1/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 42/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 19/100

Very low

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

UI accent fit 61/100

High

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

Surface fit 38/100

Low

Usable as a tinted surface in measured doses.

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0F4E65

For UI

For branding

For interior

For fashion

People also use #0F4E65 with

Sea Green Midnight Blue Wine Red 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 9.1:1. Use

Subtle surface Use #C3E1ED for cards and hover fills. Tint 80

Avoid beside #0F3266 — 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 #0F4E65 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: #0F4E65;
  --color-base-rgb: 15 78 101;
  --color-base-oklch: oklch(39.7% 0.071 228.1);
  --color-50: #F1FAFE;
  --color-100: #DBF2FB;
  --color-200: #B8E4F4;
  --color-300: #88CEE7;
  --color-400: #5CB6D6;
  --color-500: #3999BC;
  --color-600: #33768F;
  --color-700: #2A5565;
  --color-800: #1F3942;
  --color-900: #152329;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F1FAFE',
    100: '#DBF2FB',
    200: '#B8E4F4',
    300: '#88CEE7',
    400: '#5CB6D6',
    500: '#3999BC',
    600: '#33768F',
    700: '#2A5565',
    800: '#1F3942',
    900: '#152329',
  },
}

$base: #0F4E65;
$base-ink: #FFFFFF;
$base-50: #F1FAFE;
$base-100: #DBF2FB;
$base-200: #B8E4F4;
$base-300: #88CEE7;
$base-400: #5CB6D6;
$base-500: #3999BC;
$base-600: #33768F;
$base-700: #2A5565;
$base-800: #1F3942;
$base-900: #152329;
$base-hover: #0C3F52;
$base-subtle: #A3D4E5;

{
    "color": {
        "base": {
            "value": "#0F4E65",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FAFE",
                "type": "color"
            },
            "100": {
                "value": "#DBF2FB",
                "type": "color"
            },
            "200": {
                "value": "#B8E4F4",
                "type": "color"
            },
            "300": {
                "value": "#88CEE7",
                "type": "color"
            },
            "400": {
                "value": "#5CB6D6",
                "type": "color"
            },
            "500": {
                "value": "#3999BC",
                "type": "color"
            },
            "600": {
                "value": "#33768F",
                "type": "color"
            },
            "700": {
                "value": "#2A5565",
                "type": "color"
            },
            "800": {
                "value": "#1F3942",
                "type": "color"
            },
            "900": {
                "value": "#152329",
                "type": "color"
            }
        }
    }
}