What color is #283D76?

#283D76 is a dark blue. In RGB it is rgb(40, 61, 118), and in HSL hsl(224, 49%, 31%).

Is #283D76 accessible as text?

On white, #283D76 has a contrast ratio of 10.40:1 (passes WCAG AA for body text); on black it is 2.02:1 (fails). For text placed on #283D76, use white for the best readability.

What is the closest Tailwind color to #283D76?

The nearest Tailwind CSS token is blue-900 (#1C398E).

What colors go well with #283D76?

#283D76 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #766128. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #283D76 below.

Is #283D76 good for buttons?

#283D76 works well for buttons and highlights, but use white text on #283D76 — black text only reaches 2.02:1, below the 4.5:1 needed for normal-size labels.

Is #283D76 the same as CSS darkslateblue?

No — #283D76 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#283D76 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #283D76

Not just a swatch — here's how #283D76 works with other colors. Named schemes with #283D76 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #283D76 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Luxury Packaging Feature · 5 colors

Feature #283D76 Anchor #141210 Accent #DD965A Secondary #242933 Surface #F4ECE3

Classic Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #283D76 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #201C43

Classic Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Classic Blue.

Vintage Leather Lead · 5 colors

Lead #283D76 Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

Classic 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 #F8F4EF Accent #283D76 Secondary #5E677C Support #9D8F88 Ink #18140F

Classic 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 Classic Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #283D76 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 26/100

Cool

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

Softness 33/100

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 44/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 39/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 62/100

High

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

Surface fit 30/100

Low

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

Print safety 82/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #283D76

For UI

For branding

For interior

For fashion

People also use #283D76 with

Dark Cyan Indigo Raw Umber 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 10.4:1. Use

Subtle surface Use #CFD6E8 for cards and hover fills. Tint 80

Avoid beside #2D2876 — 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 #283D76 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: #283D76;
  --color-base-rgb: 40 61 118;
  --color-base-oklch: oklch(37.5% 0.101 266.4);
  --color-50: #F3F5FB;
  --color-100: #E0E6F5;
  --color-200: #C2CDEA;
  --color-300: #98A9D7;
  --color-400: #7086C2;
  --color-500: #4F66A6;
  --color-600: #42537F;
  --color-700: #343E5B;
  --color-800: #252B3C;
  --color-900: #181C25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F3F5FB',
    100: '#E0E6F5',
    200: '#C2CDEA',
    300: '#98A9D7',
    400: '#7086C2',
    500: '#4F66A6',
    600: '#42537F',
    700: '#343E5B',
    800: '#252B3C',
    900: '#181C25',
  },
}

$base: #283D76;
$base-ink: #FFFFFF;
$base-50: #F3F5FB;
$base-100: #E0E6F5;
$base-200: #C2CDEA;
$base-300: #98A9D7;
$base-400: #7086C2;
$base-500: #4F66A6;
$base-600: #42537F;
$base-700: #343E5B;
$base-800: #252B3C;
$base-900: #181C25;
$base-hover: #20315E;
$base-subtle: #B7C1DE;

{
    "color": {
        "base": {
            "value": "#283D76",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F5FB",
                "type": "color"
            },
            "100": {
                "value": "#E0E6F5",
                "type": "color"
            },
            "200": {
                "value": "#C2CDEA",
                "type": "color"
            },
            "300": {
                "value": "#98A9D7",
                "type": "color"
            },
            "400": {
                "value": "#7086C2",
                "type": "color"
            },
            "500": {
                "value": "#4F66A6",
                "type": "color"
            },
            "600": {
                "value": "#42537F",
                "type": "color"
            },
            "700": {
                "value": "#343E5B",
                "type": "color"
            },
            "800": {
                "value": "#252B3C",
                "type": "color"
            },
            "900": {
                "value": "#181C25",
                "type": "color"
            }
        }
    }
}

Palettes built on #283D76

Color Lab

Pairs with #283D76

UI roles & guardrails

In real applications

Scales

Every model

Export