What color is #155ABA?

#155ABA is a medium, vivid blue. In RGB it is rgb(21, 90, 186), and in HSL hsl(215, 80%, 41%).

Is #155ABA accessible as text?

On white, #155ABA has a contrast ratio of 6.56:1 (passes WCAG AA for body text); on black it is 3.20:1 (fails). For text placed on #155ABA, use white for the best readability.

What is the closest Tailwind color to #155ABA?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #155ABA?

#155ABA pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BC7615. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #155ABA below.

Is #155ABA good for buttons?

#155ABA works well for buttons and highlights, but use white text on #155ABA — black text only reaches 3.20:1, below the 4.5:1 needed for normal-size labels.

Is #155ABA the same as CSS royalblue?

No — #155ABA is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#155ABA Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #155ABA

Not just a swatch — here's how #155ABA works with other colors. Named schemes with #155ABA in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #155ABA Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Denim 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 #155ABA Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #4580D9

Denim 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 Denim Blue.

Vintage Leather Lead · 5 colors

Lead #155ABA Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57223A

Denim 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 #155ABA Surface #EDE9D6 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Denim 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 #155ABA Secondary #7289AB Support #9D8F89 Ink #16140F

Denim 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 Denim Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #155ABA 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 35/100

Low

Middle-weight — neither delicate nor heavy.

Depth 54/100

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 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 55/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 45/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 94/100

Very high

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

Surface fit 8/100

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 #155ABA

For UI

For branding

For interior

For fashion

People also use #155ABA with

Turquoise Klein Blue Copper Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 6.6:1. Use

Subtle surface Use #D0DEF2 for cards and hover fills. Tint 80

Avoid beside #1523BC — 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 #155ABA 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: #155ABA;
  --color-base-rgb: 21 90 186;
  --color-base-oklch: oklch(48.5% 0.166 258.4);
  --color-50: #F1F6FE;
  --color-100: #D9E8FC;
  --color-200: #B6D1F7;
  --color-300: #84AFEB;
  --color-400: #578EDB;
  --color-500: #346FC1;
  --color-600: #2F5993;
  --color-700: #274268;
  --color-800: #1D2D44;
  --color-900: #141D29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  denim-blue: {
    50: '#F1F6FE',
    100: '#D9E8FC',
    200: '#B6D1F7',
    300: '#84AFEB',
    400: '#578EDB',
    500: '#346FC1',
    600: '#2F5993',
    700: '#274268',
    800: '#1D2D44',
    900: '#141D29',
  },
}

$base: #155ABA;
$base-ink: #FFFFFF;
$base-50: #F1F6FE;
$base-100: #D9E8FC;
$base-200: #B6D1F7;
$base-300: #84AFEB;
$base-400: #578EDB;
$base-500: #346FC1;
$base-600: #2F5993;
$base-700: #274268;
$base-800: #1D2D44;
$base-900: #141D29;
$base-hover: #114897;
$base-subtle: #B6CDED;

{
    "color": {
        "base": {
            "value": "#155ABA",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F6FE",
                "type": "color"
            },
            "100": {
                "value": "#D9E8FC",
                "type": "color"
            },
            "200": {
                "value": "#B6D1F7",
                "type": "color"
            },
            "300": {
                "value": "#84AFEB",
                "type": "color"
            },
            "400": {
                "value": "#578EDB",
                "type": "color"
            },
            "500": {
                "value": "#346FC1",
                "type": "color"
            },
            "600": {
                "value": "#2F5993",
                "type": "color"
            },
            "700": {
                "value": "#274268",
                "type": "color"
            },
            "800": {
                "value": "#1D2D44",
                "type": "color"
            },
            "900": {
                "value": "#141D29",
                "type": "color"
            }
        }
    }
}

Palettes built on #155ABA

Color Lab

Pairs with #155ABA

UI roles & guardrails

In real applications

Scales

Every model

Export