What color is #0F445B?

#0F445B is a dark, vivid cyan-blue. In RGB it is rgb(15, 68, 91), and in HSL hsl(198, 72%, 21%).

Is #0F445B accessible as text?

On white, #0F445B has a contrast ratio of 10.51:1 (passes WCAG AA for body text); on black it is 2.00:1 (fails). For text placed on #0F445B, use white for the best readability.

What is the closest Tailwind color to #0F445B?

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

What colors go well with #0F445B?

#0F445B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5C260F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0F445B below.

Is #0F445B good for buttons?

#0F445B works well for buttons and highlights, but use white text on #0F445B — black text only reaches 2.00:1, below the 4.5:1 needed for normal-size labels.

Is #0F445B the same as CSS darkslategray?

No — #0F445B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#0F445B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0F445B

Not just a swatch — here's how #0F445B works with other colors. Named schemes with #0F445B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0F445B Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Charcoal 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 #0F445B Secondary #AEB4B8 Surface #F1F2F0 Support #7B93A6 Anchor #2E3236

Charcoal 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 #0F445B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3A657B

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

Vintage Leather Lead · 5 colors

Lead #0F445B Secondary #6F5216 Surface #E2DCC0 Accent #385244 Anchor #56233D

Charcoal 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 #0F445B Secondary #586770 Support #969386 Ink #16140F

Charcoal 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 Charcoal carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #0F445B 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 30/100

Cool

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

Softness 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 38/100

Low

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 26/100

Low

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

UI accent fit 50/100

Moderate

Workable accent with care around contrast.

Surface fit 41/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0F445B

For UI

For branding

For interior

For fashion

People also use #0F445B with

Pine Green Navy Espresso Platinum Charcoal

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 10.5:1. Use

Subtle surface Use #C2DFEC for cards and hover fills. Tint 80

Avoid beside #0F2B5C — 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 #0F445B at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #0F445B;
  --color-base-rgb: 15 68 91;
  --color-base-oklch: oklch(36.5% 0.066 231.9);
  --color-50: #F1FAFD;
  --color-100: #DBF1FA;
  --color-200: #B9E2F3;
  --color-300: #89CAE6;
  --color-400: #5DB1D5;
  --color-500: #3B94BA;
  --color-600: #34738E;
  --color-700: #2A5364;
  --color-800: #1F3742;
  --color-900: #152228;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F1FAFD',
    100: '#DBF1FA',
    200: '#B9E2F3',
    300: '#89CAE6',
    400: '#5DB1D5',
    500: '#3B94BA',
    600: '#34738E',
    700: '#2A5364',
    800: '#1F3742',
    900: '#152228',
  },
}

$base: #0F445B;
$base-ink: #FFFFFF;
$base-50: #F1FAFD;
$base-100: #DBF1FA;
$base-200: #B9E2F3;
$base-300: #89CAE6;
$base-400: #5DB1D5;
$base-500: #3B94BA;
$base-600: #34738E;
$base-700: #2A5364;
$base-800: #1F3742;
$base-900: #152228;
$base-hover: #0C374A;
$base-subtle: #A1D0E4;

{
    "color": {
        "base": {
            "value": "#0F445B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FAFD",
                "type": "color"
            },
            "100": {
                "value": "#DBF1FA",
                "type": "color"
            },
            "200": {
                "value": "#B9E2F3",
                "type": "color"
            },
            "300": {
                "value": "#89CAE6",
                "type": "color"
            },
            "400": {
                "value": "#5DB1D5",
                "type": "color"
            },
            "500": {
                "value": "#3B94BA",
                "type": "color"
            },
            "600": {
                "value": "#34738E",
                "type": "color"
            },
            "700": {
                "value": "#2A5364",
                "type": "color"
            },
            "800": {
                "value": "#1F3742",
                "type": "color"
            },
            "900": {
                "value": "#152228",
                "type": "color"
            }
        }
    }
}