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blue · cool

#030c2c

a deep, electric blue · cool · closest name: Midnight Blue

Token name suggestion: Midnight Harbour

RGB
3, 12, 44
HSL
227°, 87%, 9%
CMYK
93, 73, 0, 83
Luminance
0.0046

#030c2c is a deep electric blue, 227° on the wheel and 91/100 on the cool side. Put white text on it (19.22:1). As text it scores 19.22:1 on white — safe at any size. Nearest name is Midnight Blue, nearest Tailwind family is slate.

hsl(227 87% 9%)rgb(3 12 44)Base step 950AAA inkCool

At a glance

Every number on this page in one read: what #030c2c is made of, how bright it looks, and which way it leans.

Hex
#030c2c
Hue
227°
blue
Saturation
87%
electric
Lightness
9%
deep
Brightness
17%
HSV value
Perceived
7%
weighted brightness
Luminance
0.0046
WCAG relative
Temperature
Cool
91/100 cool
Color family
Blue
Tone
Electric
Best ink
White
19.22:1
Closest name
Midnight Blue
ΔE2000 13.3
Chroma
22.8
LCH, 0–130ish
OKLCH L
0.171
perceptual lightness
Tailwind
slate
500 · ΔE 33.6
Web-safe
#000033
nearest of 216
Where it sits
Hue227° of 360°
Saturation87%
Lightness9%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #030c2c.

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
Red4%
Green57%
Blue39%

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

Every format

HEX#030c2c
HEX (8-digit)#030c2cff
RGBrgb(3, 12, 44)
RGBArgba(3, 12, 44, 1)
HSLhsl(227, 87%, 9%)
HSV / HSBhsv(227, 93%, 17%)
HWBhwb(227 1% 83%)
CMYKcmyk(93%, 73%, 0%, 83%)
LABlab(4.2 7.5 -21.6)
LCHlch(4.2 22.8 289.1)
OKLCHoklch(0.171 0.067 264.9)
XYZ (D65)xyz(0.62, 0.46, 2.44)
Decimal199724
Display P3color(display-p3 0.012 0.047 0.173)
Web-safe#000033

Copy-ready code

every platformclick to select
/* CSS */
color: #030c2c;
background-color: #030c2c;
/* CSS custom property */
--brand: #030c2c;
/* Tailwind (arbitrary) */
class="text-[#030c2c] bg-[#030c2c]"
/* SCSS */
$brand: #030c2c;
/* SwiftUI */
Color(red: 0.012, green: 0.047, blue: 0.173)
/* UIKit */
UIColor(red: 0.012, green: 0.047, blue: 0.173, alpha: 1)
/* Android XML */
<color name="brand">#030C2C</color>
/* Android Compose */
Color(0xFF030C2C)
/* Flutter */
Color(0xFF030C2C)
/* Python / OpenCV (BGR) */
(44, 12, 3)
/* Python / PIL (RGB) */
(3, 12, 44)
/* Java AWT */
new Color(3, 12, 44)
/* .NET */
Color.FromArgb(255, 3, 12, 44)
/* OpenGL / Unity (0–1) */
(0.0118f, 0.0471f, 0.1725f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{3,12,44}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #030c2c 85%, white);
border-color: color-mix(in oklab, #030c2c 40%, transparent);
/* theme-aware in one line */
color: light-dark(#082177, #D3D9EE);
/* relative colour syntax */
--hover: hsl(from #030c2c 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: #F2F4FD;
  --brand-100: #E5EAFA;
  --brand-200: #C4D0F7;
  --brand-300: #96ACF8;
  --brand-400: #6182F4;
  --brand-500: #2D58F1;
  --brand-600: #103FE5;
  --brand-700: #0D34BF;
  --brand-800: #0A2A99;
  --brand-900: #0C226E;
  --brand-950: #030c2c;
  --brand: #030c2c;
  --brand-ink: #ffffff;
  --brand-surface: #F4F6FA;
  --brand-border: #C0CAED;
  --brand-hover: #01030B;
  --brand-pressed: #000000;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141724;
    --brand-ink: #D3D9EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F2F4FD',
        100: '#E5EAFA',
        200: '#C4D0F7',
        300: '#96ACF8',
        400: '#6182F4',
        500: '#2D58F1',
        600: '#103FE5',
        700: '#0D34BF',
        800: '#0A2A99',
        900: '#0C226E',
        950: '#030c2c',
        DEFAULT: '#030c2c',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F2F4FD,
  '100': #E5EAFA,
  '200': #C4D0F7,
  '300': #96ACF8,
  '400': #6182F4,
  '500': #2D58F1,
  '600': #103FE5,
  '700': #0D34BF,
  '800': #0A2A99,
  '900': #0C226E,
  '950': #030c2c,
);
$brand-base: #030c2c;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F2F4FD", "$type": "color" },
      "100": { "$value": "#E5EAFA", "$type": "color" },
      "200": { "$value": "#C4D0F7", "$type": "color" },
      "300": { "$value": "#96ACF8", "$type": "color" },
      "400": { "$value": "#6182F4", "$type": "color" },
      "500": { "$value": "#2D58F1", "$type": "color" },
      "600": { "$value": "#103FE5", "$type": "color" },
      "700": { "$value": "#0D34BF", "$type": "color" },
      "800": { "$value": "#0A2A99", "$type": "color" },
      "900": { "$value": "#0C226E", "$type": "color" },
      "950": { "$value": "#030c2c", "$type": "color" }
    },
    "brandInk": { "$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 #030c2c · 19.22:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 19.22:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 1.09:1
AA fail · AA large fail · AAA fail
Reading the other direction: #030c2c as text scores 19.22:1 on white and 1.09:1 on black.
Best tinted ink on it, if plain black or white feels flat: #E7ECFD at 16.30:1.

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
#030c2c · 19.22:1
AA on whitealready passes
#030c2c
The quick fox
#030c2c · 19.22:1
AAA on whitealready passes
#030c2c
The quick fox
#466CF2 · 4.69:1
AA on black+52% L
#466CF2
The quick fox
#7692F6 · 7.21:1
AAA on black+62% L
#7692F6

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #030C2C 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
#030c2c on white: 19.22:1
AA ✓ pass · AA-large · AAA
Aa
#030c2c on black: 1.09:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #030c2c as text on that neutral, and that neutral as text on #030c2c.

NeutralRatioBoth directions
White19.22:1AaAa
Slate 5018.37:1AaAa
Slate 10017.54:1AaAa
Slate 20015.59:1AaAa
Slate 30012.94:1AaAa
Slate 4007.49:1AaAa
Slate 5004.04:1AaAa
Slate 6002.54:1AaAa
Slate 7001.86:1AaAa
Slate 8001.31:1AaAa
Slate 9001.08:1AaAa
Black1.09:1AaAa
Colour vision deficiency
true color
protanopia · #00112D
deuteranopia · #000D2B
tritanopia · #00141A

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. #030c2c is pinned to step 950; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F2F4FD
#E5EAFA
#C4D0F7
#96ACF8
#6182F4
#2D58F1
#103FE5
#0D34BF
#0A2A99
#0C226E
#030c2c
Base = 950Lightest = 50 · #F2F4FDDarkest = 950 · #030c2cText 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 0.017 264.9);
  --brand-100: oklch(0.94 0.027 264.9);
  --brand-200: oklch(0.88 0.040 264.9);
  --brand-300: oklch(0.80 0.052 264.9);
  --brand-400: oklch(0.72 0.061 264.9);
  --brand-500: oklch(0.64 0.067 264.9);
  --brand-600: oklch(0.56 0.067 264.9);
  --brand-700: oklch(0.48 0.063 264.9);
  --brand-800: oklch(0.40 0.056 264.9);
  --brand-900: oklch(0.32 0.047 264.9);
  --brand-950: oklch(0.24 0.037 264.9);
}

Colors that work with #030c2c

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#C0CAED
Hairlines and dividers
Muted text#4B5C9B
Captions on the surface
Accent#2D1902
Second voice, not a rival
Dark variant#082177
Hover, pressed, headers
Light variant#E7ECFD
Selected rows, tints
Dark surface#141724
Dark-mode background
Hover#01030B
One step down in lightness
Pressed#000000
Two steps down
Disabled#3E4661
Chroma pulled out
Focus ring#010F42
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 #030c2c

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
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Text on black or near-black surfaces
  • Full-page backgrounds — tiring over long sessions
  • Black text placed on it
  • 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.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The low lightness adds weight and formality.

Worth knowing

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

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight91/100
  • 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#2C2303
Analogous left#03202C
Analogous right#0E032C
Split-complement 1#2C0E03
Split-complement 2#202C03
Triadic 1#2C030C
Triadic 2#0C2C03
Tetradic#2C0320
On the wheel
Base+30°−30°+120°+240°+180°227°

#030c2c sits at 227°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red1.2%
Green4.7%
Blue17.3%
R · 0–255
3
0x03
G · 0–255
12
0x0c
B · 0–255
44
0x2c

CMYK percentages

Cyan93.2%
Magenta72.7%
Yellow0.0%
Key (black)82.7%

Total ink coverage is 249%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#030c2c text on a black background

contrast 1.09:1

Card sample

#030c2c text on a white background

contrast 19.22:1

Card sample

#030c2c on grey

17.54:1

#030c2c on its own surface

17.76:1

#030c2c on its dark surface

1.08:1

CSS3 live lab

Text font color

The quick brown fox

color: #030c2c;
Background color
Panel with #030c2c background
background-color: #030c2c;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #030c2c;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(3, 12, 44, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(3, 12, 44, 0.45);
Border & gradient
Gradient panel
border: 3px solid #030c2c;
background: linear-gradient(135deg, #030c2c, #15032C);
Gradient text

Gradient headline

background: linear-gradient(90deg, #030c2c, #20032C);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #030c2c;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #030c2c;
caret-color: #030c2c;
Left rule
Pull quote or callout
border-left: 4px solid #030c2c;
Ring + tint
Selected chip
background: #E7ECFD;
box-shadow: inset 0 0 0 2px #030c2c;
Conic badge
68%
background: conic-gradient(#030c2c 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #030c2c 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(3, 12, 44, 0.5)
rgb(3 12 44 / 50%)
#030c2c80
hsl(227 87% 9% / 50%)
color-mix(in srgb, #030c2c 50%, transparent)
Alpha8-digit hexFlat on white
10%#030c2c1a#E6E7EA
20%#030c2c33#CDCED5
40%#030c2c66#9A9EAB
60%#030c2c99#686D80
80%#030c2ccc#353D56

Gradients from #030c2c

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, #071C65, #030c2c 45%, #082177);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #030c2c, #09010F);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #030c2c, #2C2303);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #092382 0%, #030c2c 45%, #082177 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%, #064B5C 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #1E0549 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #082177 0%, transparent 65%), #030c2c;

Monochromatic scale

Palettes built from #030c2c

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.

#030c2c 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

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

Very dark values collapse into each other on cheap panels — leave more lightness between your darkest steps than the numbers suggest.

In dark mode

Too dim on dark surfaces at 1.09:1 — lift it to #466CF2 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.

#030c2c, answered

What color is #030c2c?

#030c2c is a deep electric blue, closest to Midnight Blue (ΔE2000 13.3). It sits at 227° on the hue wheel with 87% saturation and 9% lightness, which reads as cool.

What is the RGB value of #030c2c?

rgb(3, 12, 44) — 3 red, 12 green and 44 blue out of 255, or 1.2% / 4.7% / 17.3% by channel.

What is #030c2c in HSL and HSV?

hsl(227, 87%, 9%) and hsv(227, 93%, 17%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #030c2c a light or a dark color?

It is a dark color. Relative luminance is 0.0046 and perceived brightness is 7%, so white text on it reaches 19.22:1.

Should I use black or white text on #030c2c?

White. It scores 19.22:1 against #030c2c, versus 1.09:1 for black — AAA at any size.

Is #030c2c accessible on a white background?

#030c2c on white scores 19.22:1, which clears AAA at every size.

What is the complementary color of #030c2c?

#2C2303 sits directly opposite on the wheel. Softer options are the split-complements #2C0E03 and #202C03, which give the same contrast with far less vibration.

What colors go well with #030c2c?

For interface work: #F4F6FA as the surface, #C0CAED for borders, #4B5C9B for secondary text, #2D1902 as an accent and #082177 for hover and pressed states. For a palette, the analogous pair #03202C and #0E032C stays calm, while #2C2303 is the loudest partner.

What is #030c2c in CMYK for printing?

cmyk(93%, 73%, 0%, 83%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #030c2c 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 #09032C; nudged cooler, #03142C.

Which Tailwind color is closest to #030c2c?

The slate family — its 500 step is #64748b, ΔE2000 33.6 away. That is a visible difference, so define #030c2c as a custom token rather than reaching for the built-in.

How do I use #030c2c in Tailwind CSS?

Inline it as an arbitrary value with bg-[#030c2c] or text-[#030c2c], 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 #030c2c with 50% opacity?

rgba(3, 12, 44, 0.5), or #030c2c80 in eight-digit hex. Over white that composites to #818696; over black, #020616.

Is #030c2c a web-safe color?

No. The nearest web-safe colour is #000033, ΔE2000 4.7 away. The palette only matters for legacy displays and some email clients now.

What does the color #030c2c 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 #030c2c?

The safest is same-hue elevation: linear-gradient(135deg, #071C65, #030c2c 45%, #082177). For more colour, a short hue run to #09010F keeps it rich without turning muddy.

Work with #030c2c in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #030c2c at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.