What color is #15283D?

#15283D is a very dark blue. In RGB it is rgb(21, 40, 61), and in HSL hsl(212, 49%, 16%).

Is #15283D accessible as text?

On white, #15283D has a contrast ratio of 14.97:1 (passes WCAG AA for body text); on black it is 1.40:1 (fails). For text placed on #15283D, use white for the best readability.

What is the closest Tailwind color to #15283D?

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

What colors go well with #15283D?

#15283D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #3D2A15. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #15283D below.

Is #15283D good for buttons?

#15283D works well for buttons and highlights, but use white text on #15283D — black text only reaches 1.40:1, below the 4.5:1 needed for normal-size labels.

Is #15283D the same as CSS midnightblue?

No — #15283D is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#15283D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #15283D

Not just a swatch — here's how #15283D works with other colors. Named schemes with #15283D in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #15283D Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 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 #15283D 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 #15283D Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #35475C

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 #15283D Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

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 #15283D Secondary #454C54 Support #959386 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 #15283D 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 37/100

Cool

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

Softness 28/100

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 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 71/100

High

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

Brand distinctiveness 18/100

Very low

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

UI accent fit 22/100

Low

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

Surface fit 53/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 90/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #15283D

For UI

For branding

For interior

For fashion

People also use #15283D with

Dark Slate Gray 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 15.0:1. Use

Subtle surface Use #C5D3E3 for cards and hover fills. Tint 80

Avoid beside #151A3D — 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 #15283D 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: #15283D;
  --color-base-rgb: 21 40 61;
  --color-base-oklch: oklch(27.2% 0.047 252.1);
  --color-50: #F3F7FB;
  --color-100: #E0EAF5;
  --color-200: #C2D5EA;
  --color-300: #98B5D7;
  --color-400: #7096C2;
  --color-500: #4F78A6;
  --color-600: #425F7F;
  --color-700: #34465B;
  --color-800: #25303C;
  --color-900: #181E25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  prussian-blue: {
    50: '#F3F7FB',
    100: '#E0EAF5',
    200: '#C2D5EA',
    300: '#98B5D7',
    400: '#7096C2',
    500: '#4F78A6',
    600: '#425F7F',
    700: '#34465B',
    800: '#25303C',
    900: '#181E25',
  },
}

$base: #15283D;
$base-ink: #FFFFFF;
$base-50: #F3F7FB;
$base-100: #E0EAF5;
$base-200: #C2D5EA;
$base-300: #98B5D7;
$base-400: #7096C2;
$base-500: #4F78A6;
$base-600: #425F7F;
$base-700: #34465B;
$base-800: #25303C;
$base-900: #181E25;
$base-hover: #112031;
$base-subtle: #A7BDD7;

{
    "color": {
        "base": {
            "value": "#15283D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F7FB",
                "type": "color"
            },
            "100": {
                "value": "#E0EAF5",
                "type": "color"
            },
            "200": {
                "value": "#C2D5EA",
                "type": "color"
            },
            "300": {
                "value": "#98B5D7",
                "type": "color"
            },
            "400": {
                "value": "#7096C2",
                "type": "color"
            },
            "500": {
                "value": "#4F78A6",
                "type": "color"
            },
            "600": {
                "value": "#425F7F",
                "type": "color"
            },
            "700": {
                "value": "#34465B",
                "type": "color"
            },
            "800": {
                "value": "#25303C",
                "type": "color"
            },
            "900": {
                "value": "#181E25",
                "type": "color"
            }
        }
    }
}