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blue · cool

#2d52d8

a balanced, vivid blue · cool · closest name: Royal Blue

Token name suggestion: True Denim

RGB
45, 82, 216
HSL
227°, 69%, 51%
CMYK
79, 62, 0, 15
Luminance
0.1155

#2d52d8 is a balanced vivid blue, 227° on the wheel and 91/100 on the cool side. Put white text on it (6.34:1). As text it scores 6.34:1 on white — safe at any size. Nearest name is Royal Blue, nearest Tailwind family is indigo.

hsl(227 69% 51%)rgb(45 82 216)Base step 600AA inkCool

At a glance

Every number on this page in one read: what #2d52d8 is made of, how bright it looks, and which way it leans.

Hex
#2d52d8
Hue
227°
blue
Saturation
69%
vivid
Lightness
51%
balanced
Brightness
85%
HSV value
Perceived
39%
weighted brightness
Luminance
0.1155
WCAG relative
Temperature
Cool
91/100 cool
Color family
Blue
Tone
Vivid
Best ink
White
6.34:1
Closest name
Royal Blue
ΔE2000 7.6
Chroma
80.3
LCH, 0–130ish
OKLCH L
0.500
perceptual lightness
Tailwind
indigo
500 · ΔE 9.5
Web-safe
#3366CC
nearest of 216
Where it sits
Hue227° of 360°
Saturation69%
Lightness51%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #2d52d8.

Temperature
Warm ← → Cool91% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red5%
Green52%
Blue43%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#2d52d8
HEX (8-digit)#2d52d8ff
RGBrgb(45, 82, 216)
RGBArgba(45, 82, 216, 1)
HSLhsl(227, 69%, 51%)
HSV / HSBhsv(227, 79%, 85%)
HWBhwb(227 18% 15%)
CMYKcmyk(79%, 62%, 0%, 15%)
LABlab(40.5 35.4 -72.1)
LCHlch(40.5 80.3 296.1)
OKLCHoklch(0.500 0.209 266.5)
XYZ (D65)xyz(16.49, 11.55, 66.31)
Decimal2970328
Display P3color(display-p3 0.176 0.322 0.847)
Web-safe#3366CC

Copy-ready code

every platformclick to select
/* CSS */
color: #2d52d8;
background-color: #2d52d8;
/* CSS custom property */
--brand: #2d52d8;
/* Tailwind (arbitrary) */
class="text-[#2d52d8] bg-[#2d52d8]"
/* SCSS */
$brand: #2d52d8;
/* SwiftUI */
Color(red: 0.176, green: 0.322, blue: 0.847)
/* UIKit */
UIColor(red: 0.176, green: 0.322, blue: 0.847, alpha: 1)
/* Android XML */
<color name="brand">#2D52D8</color>
/* Android Compose */
Color(0xFF2D52D8)
/* Flutter */
Color(0xFF2D52D8)
/* Python / OpenCV (BGR) */
(216, 82, 45)
/* Python / PIL (RGB) */
(45, 82, 216)
/* Java AWT */
new Color(45, 82, 216)
/* .NET */
Color.FromArgb(255, 45, 82, 216)
/* OpenGL / Unity (0–1) */
(0.1765f, 0.3216f, 0.8471f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{45,82,216}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #2d52d8 85%, white);
border-color: color-mix(in oklab, #2d52d8 40%, transparent);
/* theme-aware in one line */
color: light-dark(#14276C, #D3D9EE);
/* relative colour syntax */
--hover: hsl(from #2d52d8 h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F3F5FB;
  --brand-100: #E8EBF8;
  --brand-200: #CAD2F2;
  --brand-300: #A0B1ED;
  --brand-400: #718AE5;
  --brand-500: #4263DC;
  --brand-600: #2d52d8;
  --brand-700: #203EAC;
  --brand-800: #1A328A;
  --brand-900: #172764;
  --brand-950: #0E193E;
  --brand: #2d52d8;
  --brand-ink: #ffffff;
  --brand-surface: #F4F6FA;
  --brand-border: #C0C9ED;
  --brand-hover: #2345BE;
  --brand-pressed: #1E3AA0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141724;
    --brand-ink: #D3D9EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F3F5FB',
        100: '#E8EBF8',
        200: '#CAD2F2',
        300: '#A0B1ED',
        400: '#718AE5',
        500: '#4263DC',
        600: '#2d52d8',
        700: '#203EAC',
        800: '#1A328A',
        900: '#172764',
        950: '#0E193E',
        DEFAULT: '#2d52d8',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F3F5FB,
  '100': #E8EBF8,
  '200': #CAD2F2,
  '300': #A0B1ED,
  '400': #718AE5,
  '500': #4263DC,
  '600': #2d52d8,
  '700': #203EAC,
  '800': #1A328A,
  '900': #172764,
  '950': #0E193E,
);
$brand-base: #2d52d8;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F3F5FB", "$type": "color" },
      "100": { "$value": "#E8EBF8", "$type": "color" },
      "200": { "$value": "#CAD2F2", "$type": "color" },
      "300": { "$value": "#A0B1ED", "$type": "color" },
      "400": { "$value": "#718AE5", "$type": "color" },
      "500": { "$value": "#4263DC", "$type": "color" },
      "600": { "$value": "#2d52d8", "$type": "color" },
      "700": { "$value": "#203EAC", "$type": "color" },
      "800": { "$value": "#1A328A", "$type": "color" },
      "900": { "$value": "#172764", "$type": "color" },
      "950": { "$value": "#0E193E", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#ffffff on #2d52d8 · 6.34:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.34:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.31:1
AA fail · AA large pass · AAA fail
Reading the other direction: #2d52d8 as text scores 6.34:1 on white and 3.31:1 on black.
Best tinted ink on it, if plain black or white feels flat: #E9EDFB at 5.43:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#2d52d8 · 6.34:1
AA on whitealready passes
#2d52d8
The quick fox
#264BCF · 7.02:1
AAA on white−3% L
#264BCF
The quick fox
#4F6EDE · 4.62:1
AA on black+8% L
#4F6EDE
The quick fox
#7B92E6 · 7.10:1
AAA on black+18% L
#7B92E6

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #2D52D8 is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#2d52d8 on white: 6.34:1
AA ✓ pass · AA-large · AAA
Aa
#2d52d8 on black: 3.31:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #2d52d8 as text on that neutral, and that neutral as text on #2d52d8.

NeutralRatioBoth directions
White6.34:1AaAa
Slate 506.06:1AaAa
Slate 1005.79:1AaAa
Slate 2005.15:1AaAa
Slate 3004.27:1AaAa
Slate 4002.47:1AaAa
Slate 5001.33:1AaAa
Slate 6001.19:1AaAa
Slate 7001.63:1AaAa
Slate 8002.31:1AaAa
Slate 9002.81:1AaAa
Black3.31:1AaAa
Colour vision deficiency
true color
protanopia · #0068DC
deuteranopia · #0058D5
tritanopia · #00758D

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #2d52d8 is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F3F5FB
#E8EBF8
#CAD2F2
#A0B1ED
#718AE5
#4263DC
#2d52d8
#203EAC
#1A328A
#172764
#0E193E
Base = 600Lightest = 50 · #F3F5FBDarkest = 950 · #0E193EText step on white = 500
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.052 266.5);
  --brand-100: oklch(0.94 0.084 266.5);
  --brand-200: oklch(0.88 0.125 266.5);
  --brand-300: oklch(0.80 0.163 266.5);
  --brand-400: oklch(0.72 0.192 266.5);
  --brand-500: oklch(0.64 0.209 266.5);
  --brand-600: oklch(0.56 0.209 266.5);
  --brand-700: oklch(0.48 0.197 266.5);
  --brand-800: oklch(0.40 0.176 266.5);
  --brand-900: oklch(0.32 0.146 266.5);
  --brand-950: oklch(0.24 0.115 266.5);
}

Colors that work with #2d52d8

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#ffffff
White wins here
Surface#F4F6FA
Tinted page background
Border#C0C9ED
Hairlines and dividers
Muted text#4B5C9B
Captions on the surface
Accent#B06B1C
Second voice, not a rival
Dark variant#14276C
Hover, pressed, headers
Light variant#E9EDFB
Selected rows, tints
Dark surface#141724
Dark-mode background
Hover#2345BE
One step down in lightness
Pressed#1E3AA0
Two steps down
Disabled#ACB2CA
Chroma pulled out
Focus ring#335AE7
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #2d52d8

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Body text and links on white
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Full-page backgrounds — tiring over long sessions
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

trustedcalmcompetentcorporate

The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. The mid lightness keeps it versatile in both themes.

Worth knowing

It is also the most crowded hue on the web. Distinctiveness has to come from your other choices.

Reads as
  • FormalityMedium
  • EnergyMedium-high
  • Weight49/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#D8B32D
Analogous left#2DA8D8
Analogous right#5E2DD8
Split-complement 1#D85E2D
Split-complement 2#A8D82D
Triadic 1#D82D52
Triadic 2#52D82D
Tetradic#D82DA8
On the wheel
Base+30°−30°+120°+240°+180°227°

#2d52d8 sits at 227°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red17.6%
Green32.2%
Blue84.7%
R · 0–255
45
0x2d
G · 0–255
82
0x52
B · 0–255
216
0xd8

CMYK percentages

Cyan79.2%
Magenta62.0%
Yellow0.0%
Key (black)15.3%

Total ink coverage is 157%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#2d52d8 text on a black background

contrast 3.31:1

Card sample

#2d52d8 text on a white background

contrast 6.34:1

Card sample

#2d52d8 on grey

5.79:1

#2d52d8 on its own surface

5.86:1

#2d52d8 on its dark surface

2.81:1

CSS3 live lab

Text font color

The quick brown fox

color: #2d52d8;
Background color
Panel with #2d52d8 background
background-color: #2d52d8;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #2d52d8;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(45, 82, 216, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(45, 82, 216, 0.45);
Border & gradient
Gradient panel
border: 3px solid #2d52d8;
background: linear-gradient(135deg, #2d52d8, #7A2DD8);
Gradient text

Gradient headline

background: linear-gradient(90deg, #2d52d8, #A52DD8);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #2d52d8;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #2d52d8;
caret-color: #2d52d8;
Left rule
Pull quote or callout
border-left: 4px solid #2d52d8;
Ring + tint
Selected chip
background: #E9EDFB;
box-shadow: inset 0 0 0 2px #2d52d8;
Conic badge
68%
background: conic-gradient(#2d52d8 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #2d52d8 over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(45, 82, 216, 0.5)
rgb(45 82 216 / 50%)
#2d52d880
hsl(227 69% 51% / 50%)
color-mix(in srgb, #2d52d8 50%, transparent)
Alpha8-digit hexFlat on white
10%#2d52d81a#EAEEFB
20%#2d52d833#D5DCF7
40%#2d52d866#ABBAEF
60%#2d52d899#8197E8
80%#2d52d8cc#5775E0

Gradients from #2d52d8

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #617DE2, #2d52d8 45%, #14276C);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #2d52d8, #7924C2);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #2d52d8, #D8B32D);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #7B92E6 0%, #2d52d8 45%, #14276C 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F6FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #58C5E0 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #7E47DD 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #14276C 0%, transparent 65%), #2d52d8;

Monochromatic scale

Palettes built from #2d52d8

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#2d52d8 in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyFinanceHealthcareEnterprise SaaS
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Converts to four-color process without much drama. Proof it anyway.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Too dim on dark surfaces at 3.31:1 — lift it to #4F6EDE for body text, or reserve it for fills.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#2d52d8, answered

What color is #2d52d8?

#2d52d8 is a balanced vivid blue, closest to Royal Blue (ΔE2000 7.6). It sits at 227° on the hue wheel with 69% saturation and 51% lightness, which reads as cool.

What is the RGB value of #2d52d8?

rgb(45, 82, 216) — 45 red, 82 green and 216 blue out of 255, or 17.6% / 32.2% / 84.7% by channel.

What is #2d52d8 in HSL and HSV?

hsl(227, 69%, 51%) and hsv(227, 79%, 85%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #2d52d8 a light or a dark color?

It is a dark color. Relative luminance is 0.1155 and perceived brightness is 39%, so white text on it reaches 6.34:1.

Should I use black or white text on #2d52d8?

White. It scores 6.34:1 against #2d52d8, versus 3.31:1 for black — AA at any size.

Is #2d52d8 accessible on a white background?

#2d52d8 on white scores 6.34:1, which clears AA at every size but not AAA.

What is the complementary color of #2d52d8?

#D8B32D sits directly opposite on the wheel. Softer options are the split-complements #D85E2D and #A8D82D, which give the same contrast with far less vibration.

What colors go well with #2d52d8?

For interface work: #F4F6FA as the surface, #C0C9ED for borders, #4B5C9B for secondary text, #B06B1C as an accent and #14276C for hover and pressed states. For a palette, the analogous pair #2DA8D8 and #5E2DD8 stays calm, while #D8B32D is the loudest partner.

What is #2d52d8 in CMYK for printing?

cmyk(79%, 62%, 0%, 15%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #2d52d8 warm or cool?

Cool — it scores 91 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #472DD8; nudged cooler, #2B68DB.

Which Tailwind color is closest to #2d52d8?

The indigo family — its 500 step is #6366f1, ΔE2000 9.5 away. That is a visible difference, so define #2d52d8 as a custom token rather than reaching for the built-in.

How do I use #2d52d8 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#2d52d8] or text-[#2d52d8], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #2d52d8 with 50% opacity?

rgba(45, 82, 216, 0.5), or #2d52d880 in eight-digit hex. Over white that composites to #96A9EC; over black, #17296C.

Is #2d52d8 a web-safe color?

No. The nearest web-safe colour is #3366CC, ΔE2000 7.1 away. The palette only matters for legacy displays and some email clients now.

What does the color #2d52d8 mean?

As a blue, it reads trusted, calm, competent. The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #2d52d8?

The safest is same-hue elevation: linear-gradient(135deg, #617DE2, #2d52d8 45%, #14276C). For more colour, a short hue run to #7924C2 keeps it rich without turning muddy.

Work with #2d52d8 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #2d52d8 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.