What color is #154EB9?

#154EB9 is a medium, vivid blue. In RGB it is rgb(21, 78, 185), and in HSL hsl(219, 80%, 40%).

Is #154EB9 accessible as text?

On white, #154EB9 has a contrast ratio of 7.44:1 (passes WCAG AA for body text); on black it is 2.82:1 (fails). For text placed on #154EB9, use white for the best readability.

What is the closest Tailwind color to #154EB9?

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

What colors go well with #154EB9?

#154EB9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B87E14. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #154EB9 below.

Is #154EB9 good for buttons?

#154EB9 works well for buttons and highlights, but use white text on #154EB9 — black text only reaches 2.82:1, below the 4.5:1 needed for normal-size labels.

Is #154EB9 the same as CSS darkslateblue?

No — #154EB9 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#154EB9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #154EB9

Not just a swatch — here's how #154EB9 works with other colors. Named schemes with #154EB9 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #154EB9 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Sapphire 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 #154EB9 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4175D8

Sapphire 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 Sapphire Blue.

Vintage Leather Lead · 5 colors

Lead #154EB9 Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

Sapphire 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 #154EB9 Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Sapphire 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 #154EB9 Secondary #6B80A6 Support #9D8F88 Ink #18140F

Sapphire 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 Sapphire Blue carrying the quiet middle.

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Color Lab

How #154EB9 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

Firm and assertive — carries weight and contrast.

Depth 57/100

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 28/100

Low

A faint retro warmth without tipping into sepia.

Luxury 56/100

Moderate

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

Brand distinctiveness 48/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 86/100

Very high

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

Surface fit 10/100

Very low

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

Print safety 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #154EB9

For UI

For branding

For interior

For fashion

People also use #154EB9 with

Lagoon Blue Egyptian Blue Copper 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 7.4:1. Use

Subtle surface Use #CFDBF2 for cards and hover fills. Tint 80

Avoid beside #1417B8 — 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 #154EB9 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

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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: #154EB9;
  --color-base-rgb: 21 78 185;
  --color-base-oklch: oklch(45.9% 0.179 261.6);
  --color-50: #F1F5FE;
  --color-100: #D9E5FC;
  --color-200: #B6CCF7;
  --color-300: #84A8EB;
  --color-400: #5785DB;
  --color-500: #3465C1;
  --color-600: #2F5293;
  --color-700: #273E68;
  --color-800: #1D2B44;
  --color-900: #141B29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  sapphire-blue: {
    50: '#F1F5FE',
    100: '#D9E5FC',
    200: '#B6CCF7',
    300: '#84A8EB',
    400: '#5785DB',
    500: '#3465C1',
    600: '#2F5293',
    700: '#273E68',
    800: '#1D2B44',
    900: '#141B29',
  },
}

$base: #154EB9;
$base-ink: #FFFFFF;
$base-50: #F1F5FE;
$base-100: #D9E5FC;
$base-200: #B6CCF7;
$base-300: #84A8EB;
$base-400: #5785DB;
$base-500: #3465C1;
$base-600: #2F5293;
$base-700: #273E68;
$base-800: #1D2B44;
$base-900: #141B29;
$base-hover: #103E93;
$base-subtle: #B5C9ED;

{
    "color": {
        "base": {
            "value": "#154EB9",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F5FE",
                "type": "color"
            },
            "100": {
                "value": "#D9E5FC",
                "type": "color"
            },
            "200": {
                "value": "#B6CCF7",
                "type": "color"
            },
            "300": {
                "value": "#84A8EB",
                "type": "color"
            },
            "400": {
                "value": "#5785DB",
                "type": "color"
            },
            "500": {
                "value": "#3465C1",
                "type": "color"
            },
            "600": {
                "value": "#2F5293",
                "type": "color"
            },
            "700": {
                "value": "#273E68",
                "type": "color"
            },
            "800": {
                "value": "#1D2B44",
                "type": "color"
            },
            "900": {
                "value": "#141B29",
                "type": "color"
            }
        }
    }
}

Palettes built on #154EB9

Color Lab

Pairs with #154EB9

UI roles & guardrails

In real applications

Scales

Every model

Export