What color is #0C435E?

#0C435E is a dark, vivid cyan-blue. In RGB it is rgb(12, 67, 94), and in HSL hsl(200, 77%, 21%).

Is #0C435E accessible as text?

On white, #0C435E has a contrast ratio of 10.61:1 (passes WCAG AA for body text); on black it is 1.98:1 (fails). For text placed on #0C435E, use white for the best readability.

What is the closest Tailwind color to #0C435E?

The nearest Tailwind CSS token is sky-900 (#024A70).

What colors go well with #0C435E?

#0C435E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5F280C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0C435E below.

Is #0C435E good for buttons?

#0C435E works well for buttons and highlights, but use white text on #0C435E — black text only reaches 1.98:1, below the 4.5:1 needed for normal-size labels.

Is #0C435E the same as CSS darkslategray?

No — #0C435E is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#0C435E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0C435E

Not just a swatch — here's how #0C435E works with other colors. Named schemes with #0C435E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0C435E 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 #0C435E Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 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 #0C435E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #38647E

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 #0C435E Secondary #6E5216 Surface #E2DDC0 Accent #385245 Anchor #57233D

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 #0C435E Secondary #576771 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 #0C435E 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 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 62/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 39/100

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 27/100

Low

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

UI accent fit 51/100

Moderate

Workable accent with care around contrast.

Surface fit 40/100

Low

Usable as a tinted surface in measured doses.

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0C435E

For UI

For branding

For interior

For fashion

People also use #0C435E with

Viridian 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 10.6:1. Use

Subtle surface Use #C0DEED for cards and hover fills. Tint 80

Avoid beside #0C285F — 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 #0C435E 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: #0C435E;
  --color-base-rgb: 12 67 94;
  --color-base-oklch: oklch(36.3% 0.071 235.9);
  --color-50: #F1FAFE;
  --color-100: #DAF0FB;
  --color-200: #B7E1F5;
  --color-300: #86C8E9;
  --color-400: #59AED9;
  --color-500: #3791BE;
  --color-600: #317191;
  --color-700: #285266;
  --color-800: #1E3743;
  --color-900: #142229;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F1FAFE',
    100: '#DAF0FB',
    200: '#B7E1F5',
    300: '#86C8E9',
    400: '#59AED9',
    500: '#3791BE',
    600: '#317191',
    700: '#285266',
    800: '#1E3743',
    900: '#142229',
  },
}

$base: #0C435E;
$base-ink: #FFFFFF;
$base-50: #F1FAFE;
$base-100: #DAF0FB;
$base-200: #B7E1F5;
$base-300: #86C8E9;
$base-400: #59AED9;
$base-500: #3791BE;
$base-600: #317191;
$base-700: #285266;
$base-800: #1E3743;
$base-900: #142229;
$base-hover: #0A364C;
$base-subtle: #9FCEE6;

{
    "color": {
        "base": {
            "value": "#0C435E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FAFE",
                "type": "color"
            },
            "100": {
                "value": "#DAF0FB",
                "type": "color"
            },
            "200": {
                "value": "#B7E1F5",
                "type": "color"
            },
            "300": {
                "value": "#86C8E9",
                "type": "color"
            },
            "400": {
                "value": "#59AED9",
                "type": "color"
            },
            "500": {
                "value": "#3791BE",
                "type": "color"
            },
            "600": {
                "value": "#317191",
                "type": "color"
            },
            "700": {
                "value": "#285266",
                "type": "color"
            },
            "800": {
                "value": "#1E3743",
                "type": "color"
            },
            "900": {
                "value": "#142229",
                "type": "color"
            }
        }
    }
}