What color is #1829BB?

#1829BB is a medium, vivid blue. In RGB it is rgb(24, 41, 187), and in HSL hsl(234, 77%, 41%).

Is #1829BB accessible as text?

On white, #1829BB has a contrast ratio of 10.13:1 (passes WCAG AA for body text); on black it is 2.07:1 (fails). For text placed on #1829BB, use white for the best readability.

What is the closest Tailwind color to #1829BB?

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

What colors go well with #1829BB?

#1829BB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B9A918. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #1829BB below.

Is #1829BB good for buttons?

#1829BB works well for buttons and highlights, but use white text on #1829BB — black text only reaches 2.07:1, below the 4.5:1 needed for normal-size labels.

Is #1829BB the same as CSS mediumblue?

No — #1829BB is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#1829BB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #1829BB

Not just a swatch — here's how #1829BB works with other colors. Named schemes with #1829BB in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #1829BB Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3659D8

Klein 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 Klein Blue.

Coastal Morning Lead · 5 colors

Lead #1829BB Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Berry & Cream Lead · 5 colors

Lead #1829BB Surface #F6E5D8 Anchor #5B2143 Accent #E5C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #1829BB Secondary #5A6D9B Support #9D8F88 Ink #18140F

Klein 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 Klein Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #1829BB Secondary #E86A74 Accent #F79250 Anchor #573B58 Surface #F7E7D7

Klein Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

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Color Lab

How #1829BB 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 10/100

Cool

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

Softness 24/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

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 14/100

Very low

Clean and current — no dusty, aged cast.

Luxury 58/100

Moderate

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

Brand distinctiveness 85/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 57/100

Moderate

Workable accent with care around contrast.

Surface fit 14/100

Very low

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

Print safety 61/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #1829BB

For UI

For branding

For interior

For fashion

People also use #1829BB with

Carolina Blue Grape Brass Gainsboro Prussian Blue

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 10.1:1. Use

Subtle surface Use #D0D4F2 for cards and hover fills. Tint 80

Avoid beside #3E18B9 — 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 #1829BB 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: #1829BB;
  --color-base-rgb: 24 41 187;
  --color-base-oklch: oklch(39.8% 0.221 267.1);
  --color-50: #F1F2FE;
  --color-100: #DADDFB;
  --color-200: #B7BDF5;
  --color-300: #8690E9;
  --color-400: #5966D9;
  --color-500: #3744BE;
  --color-600: #313B91;
  --color-700: #282F66;
  --color-800: #1E2243;
  --color-900: #141629;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  klein-blue: {
    50: '#F1F2FE',
    100: '#DADDFB',
    200: '#B7BDF5',
    300: '#8690E9',
    400: '#5966D9',
    500: '#3744BE',
    600: '#313B91',
    700: '#282F66',
    800: '#1E2243',
    900: '#141629',
  },
}

$base: #1829BB;
$base-ink: #FFFFFF;
$base-50: #F1F2FE;
$base-100: #DADDFB;
$base-200: #B7BDF5;
$base-300: #8690E9;
$base-400: #5966D9;
$base-500: #3744BE;
$base-600: #313B91;
$base-700: #282F66;
$base-800: #1E2243;
$base-900: #141629;
$base-hover: #132094;
$base-subtle: #B7BDEC;

{
    "color": {
        "base": {
            "value": "#1829BB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F2FE",
                "type": "color"
            },
            "100": {
                "value": "#DADDFB",
                "type": "color"
            },
            "200": {
                "value": "#B7BDF5",
                "type": "color"
            },
            "300": {
                "value": "#8690E9",
                "type": "color"
            },
            "400": {
                "value": "#5966D9",
                "type": "color"
            },
            "500": {
                "value": "#3744BE",
                "type": "color"
            },
            "600": {
                "value": "#313B91",
                "type": "color"
            },
            "700": {
                "value": "#282F66",
                "type": "color"
            },
            "800": {
                "value": "#1E2243",
                "type": "color"
            },
            "900": {
                "value": "#141629",
                "type": "color"
            }
        }
    }
}

Palettes built on #1829BB

Color Lab

Pairs with #1829BB

UI roles & guardrails

In real applications

Scales

Every model

Export