What color is #0A4EAE?

#0A4EAE is a dark, vivid blue. In RGB it is rgb(10, 78, 174), and in HSL hsl(215, 89%, 36%).

Is #0A4EAE accessible as text?

On white, #0A4EAE has a contrast ratio of 7.74:1 (passes WCAG AA for body text); on black it is 2.71:1 (fails). For text placed on #0A4EAE, use white for the best readability.

What is the closest Tailwind color to #0A4EAE?

The nearest Tailwind CSS token is blue-800 (#193CB8).

What colors go well with #0A4EAE?

#0A4EAE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #AE690A. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #0A4EAE below.

Is #0A4EAE good for buttons?

#0A4EAE works well for buttons and highlights, but use white text on #0A4EAE — black text only reaches 2.71:1, below the 4.5:1 needed for normal-size labels.

Is #0A4EAE the same as CSS darkslateblue?

No — #0A4EAE is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#0A4EAE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #0A4EAE

Not just a swatch — here's how #0A4EAE works with other colors. Named schemes with #0A4EAE in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #0A4EAE Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Cobalt Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Tech Product Signal · 5 colors

Signal #0A4EAE Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #3C74CD

Cobalt 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 Cobalt Blue.

Vintage Leather Lead · 5 colors

Lead #0A4EAE Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

Cobalt 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.

Berry & Cream Lead · 5 colors

Lead #0A4EAE Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Cobalt Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #0A4EAE Secondary #687E9F Support #9D8F89 Ink #16140F

Cobalt 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 Cobalt Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #0A4EAE 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 7/100

Cool

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

Softness 32/100

Low

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

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

Brand distinctiveness 45/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 87/100

Very high

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

Surface fit 11/100

Very low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 67/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #0A4EAE

For UI

For branding

For interior

For fashion

People also use #0A4EAE with

Dark Turquoise Zaffre Ginger 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 7.7:1. Use

Subtle surface Use #C9DBF3 for cards and hover fills. Tint 80

Avoid beside #0A18AE — 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 #0A4EAE at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #0A4EAE;
  --color-base-rgb: 10 78 174;
  --color-base-oklch: oklch(44.7% 0.166 259.2);
  --color-50: #F0F6FE;
  --color-100: #D8E7FD;
  --color-200: #B2D0FA;
  --color-300: #7EAEF1;
  --color-400: #4F8DE3;
  --color-500: #2C6DC9;
  --color-600: #2A5898;
  --color-700: #23416B;
  --color-800: #1B2D46;
  --color-900: #131D2B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cobalt-blue: {
    50: '#F0F6FE',
    100: '#D8E7FD',
    200: '#B2D0FA',
    300: '#7EAEF1',
    400: '#4F8DE3',
    500: '#2C6DC9',
    600: '#2A5898',
    700: '#23416B',
    800: '#1B2D46',
    900: '#131D2B',
  },
}

$base: #0A4EAE;
$base-ink: #FFFFFF;
$base-50: #F0F6FE;
$base-100: #D8E7FD;
$base-200: #B2D0FA;
$base-300: #7EAEF1;
$base-400: #4F8DE3;
$base-500: #2C6DC9;
$base-600: #2A5898;
$base-700: #23416B;
$base-800: #1B2D46;
$base-900: #131D2B;
$base-hover: #083F8B;
$base-subtle: #ADC9EF;

{
    "color": {
        "base": {
            "value": "#0A4EAE",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F6FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E7FD",
                "type": "color"
            },
            "200": {
                "value": "#B2D0FA",
                "type": "color"
            },
            "300": {
                "value": "#7EAEF1",
                "type": "color"
            },
            "400": {
                "value": "#4F8DE3",
                "type": "color"
            },
            "500": {
                "value": "#2C6DC9",
                "type": "color"
            },
            "600": {
                "value": "#2A5898",
                "type": "color"
            },
            "700": {
                "value": "#23416B",
                "type": "color"
            },
            "800": {
                "value": "#1B2D46",
                "type": "color"
            },
            "900": {
                "value": "#131D2B",
                "type": "color"
            }
        }
    }
}

Palettes built on #0A4EAE

Color Lab

Pairs with #0A4EAE

UI roles & guardrails

In real applications

Scales

Every model

Export