What color is #0A283F?

#0A283F is a very dark, vivid cyan-blue. In RGB it is rgb(10, 40, 63), and in HSL hsl(206, 73%, 14%).

Is #0A283F accessible as text?

On white, #0A283F has a contrast ratio of 15.13:1 (passes WCAG AA for body text); on black it is 1.39:1 (fails). For text placed on #0A283F, use white for the best readability.

What is the closest Tailwind color to #0A283F?

The nearest Tailwind CSS token is sky-950 (#052F4A).

What colors go well with #0A283F?

#0A283F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3E200A. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0A283F below.

Is #0A283F good for buttons?

#0A283F works well for buttons and highlights, but use white text on #0A283F — black text only reaches 1.39:1, below the 4.5:1 needed for normal-size labels.

Is #0A283F the same as CSS midnightblue?

No — #0A283F is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#0A283F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0A283F

Not just a swatch — here's how #0A283F works with other colors. Named schemes with #0A283F in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0A283F Accent #A5C4C0 Surface #DEDBBF Secondary #9AA0A0 Anchor #20344A

Prussian Blue 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 #0A283F Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Prussian Blue 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 #0A283F Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #2D475E

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

Vintage Leather Lead · 5 colors

Lead #0A283F Secondary #7F4438 Surface #E1DDC0 Accent #375245 Anchor #57233C

Prussian Blue 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 #0A283F Secondary #414B54 Support #969386 Ink #16140F

Prussian Blue 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 Prussian Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #0A283F 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 34/100

Cool

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

Softness 27/100

Low

Firm and assertive — carries weight and contrast.

Depth 70/100

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 29/100

Low

A faint retro warmth without tipping into sepia.

Luxury 73/100

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 23/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 51/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #0A283F

For UI

For branding

For interior

For fashion

People also use #0A283F with

Hunter Green Navy Bistre Gainsboro 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 15.1:1. Use

Subtle surface Use #BCD6EA for cards and hover fills. Tint 80

Avoid beside #0A163E — 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 #0A283F 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: #0A283F;
  --color-base-rgb: 10 40 63;
  --color-base-oklch: oklch(26.8% 0.055 245.4);
  --color-50: #F1F8FD;
  --color-100: #DBEDFA;
  --color-200: #B9DAF4;
  --color-300: #88BEE7;
  --color-400: #5DA1D5;
  --color-500: #3A83BB;
  --color-600: #33678E;
  --color-700: #2A4B65;
  --color-800: #1F3342;
  --color-900: #152028;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F1F8FD',
    100: '#DBEDFA',
    200: '#B9DAF4',
    300: '#88BEE7',
    400: '#5DA1D5',
    500: '#3A83BB',
    600: '#33678E',
    700: '#2A4B65',
    800: '#1F3342',
    900: '#152028',
  },
}

$base: #0A283F;
$base-ink: #FFFFFF;
$base-50: #F1F8FD;
$base-100: #DBEDFA;
$base-200: #B9DAF4;
$base-300: #88BEE7;
$base-400: #5DA1D5;
$base-500: #3A83BB;
$base-600: #33678E;
$base-700: #2A4B65;
$base-800: #1F3342;
$base-900: #152028;
$base-hover: #081F31;
$base-subtle: #99C2E2;

{
    "color": {
        "base": {
            "value": "#0A283F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F8FD",
                "type": "color"
            },
            "100": {
                "value": "#DBEDFA",
                "type": "color"
            },
            "200": {
                "value": "#B9DAF4",
                "type": "color"
            },
            "300": {
                "value": "#88BEE7",
                "type": "color"
            },
            "400": {
                "value": "#5DA1D5",
                "type": "color"
            },
            "500": {
                "value": "#3A83BB",
                "type": "color"
            },
            "600": {
                "value": "#33678E",
                "type": "color"
            },
            "700": {
                "value": "#2A4B65",
                "type": "color"
            },
            "800": {
                "value": "#1F3342",
                "type": "color"
            },
            "900": {
                "value": "#152028",
                "type": "color"
            }
        }
    }
}