What color is #150CBF?

#150CBF is a medium, vivid blue. In RGB it is rgb(21, 12, 191), and in HSL hsl(243, 88%, 40%).

Is #150CBF accessible as text?

On white, #150CBF has a contrast ratio of 11.43:1 (passes WCAG AA for body text); on black it is 1.84:1 (fails). For text placed on #150CBF, use white for the best readability.

What is the closest Tailwind color to #150CBF?

The nearest Tailwind CSS token is indigo-800 (#372AAC).

What colors go well with #150CBF?

#150CBF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B7C00C. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #150CBF below.

Is #150CBF good for buttons?

#150CBF works well for buttons and highlights, but use white text on #150CBF — black text only reaches 1.84:1, below the 4.5:1 needed for normal-size labels.

Is #150CBF the same as CSS mediumblue?

No — #150CBF is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#150CBF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #150CBF

Not just a swatch — here's how #150CBF works with other colors. Named schemes with #150CBF in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #150CBF Anchor #141210 Accent #DD965A Secondary #242933 Surface #F4ECE3

Medium 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.

Tech Product Signal · 5 colors

Signal #150CBF Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #2C4DDC

Medium 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 Medium Blue.

Moody Editorial Color · 5 colors

Color #150CBF Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #25006F

Medium 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 Medium Blue.

Coastal Morning Lead · 5 colors

Lead #150CBF Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #150CBF Secondary #516599 Support #9D8F88 Ink #18140F

Medium 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 Medium Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #150CBF 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 21/100

Low

Firm and assertive — carries weight and contrast.

Depth 69/100

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 8/100

Very low

Clean and current — no dusty, aged cast.

Luxury 57/100

Moderate

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

Brand distinctiveness 94/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 43/100

Moderate

Workable accent with care around contrast.

Surface fit 16/100

Very low

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

Print safety 57/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #150CBF

For UI

For branding

For interior

For fashion

People also use #150CBF with

Azure Grape Citron 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 11.4:1. Use

Subtle surface Use #CFCDF4 for cards and hover fills. Tint 80

Avoid beside #510CC0 — 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 #150CBF 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: #150CBF;
  --color-base-rgb: 21 12 191;
  --color-base-oklch: oklch(37.5% 0.244 267.1);
  --color-50: #F1F0FE;
  --color-100: #DAD8FD;
  --color-200: #B6B2FA;
  --color-300: #847FF0;
  --color-400: #5750E2;
  --color-500: #352DC8;
  --color-600: #302A98;
  --color-700: #27246B;
  --color-800: #1D1B46;
  --color-900: #14132B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  medium-blue: {
    50: '#F1F0FE',
    100: '#DAD8FD',
    200: '#B6B2FA',
    300: '#847FF0',
    400: '#5750E2',
    500: '#352DC8',
    600: '#302A98',
    700: '#27246B',
    800: '#1D1B46',
    900: '#14132B',
  },
}

$base: #150CBF;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #DAD8FD;
$base-200: #B6B2FA;
$base-300: #847FF0;
$base-400: #5750E2;
$base-500: #352DC8;
$base-600: #302A98;
$base-700: #27246B;
$base-800: #1D1B46;
$base-900: #14132B;
$base-hover: #110A99;
$base-subtle: #B5B2F0;

{
    "color": {
        "base": {
            "value": "#150CBF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DAD8FD",
                "type": "color"
            },
            "200": {
                "value": "#B6B2FA",
                "type": "color"
            },
            "300": {
                "value": "#847FF0",
                "type": "color"
            },
            "400": {
                "value": "#5750E2",
                "type": "color"
            },
            "500": {
                "value": "#352DC8",
                "type": "color"
            },
            "600": {
                "value": "#302A98",
                "type": "color"
            },
            "700": {
                "value": "#27246B",
                "type": "color"
            },
            "800": {
                "value": "#1D1B46",
                "type": "color"
            },
            "900": {
                "value": "#14132B",
                "type": "color"
            }
        }
    }
}

Palettes built on #150CBF

Color Lab

Pairs with #150CBF

UI roles & guardrails

In real applications

Scales

Every model

Export