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blue · cool

#2f669c

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

Token name suggestion: Dusk Denim

RGB
47, 102, 156
HSL
210°, 54%, 40%
CMYK
70, 35, 0, 39
Luminance
0.1251

#2f669c is a dark vivid blue, 210° on the wheel and 100/100 on the cool side. Put white text on it (6.00:1). As text it scores 6.00:1 on white — safe at any size. Nearest name is Royal Blue, nearest Tailwind family is slate.

hsl(210 54% 40%)rgb(47 102 156)Base step 700AA inkCool

At a glance

Every number on this page in one read: what #2f669c is made of, how bright it looks, and which way it leans.

Hex
#2f669c
Hue
210°
blue
Saturation
54%
vivid
Lightness
40%
dark
Brightness
61%
HSV value
Perceived
38%
weighted brightness
Luminance
0.1251
WCAG relative
Temperature
Cool
100/100 cool
Color family
Blue
Tone
Vivid
Best ink
White
6.00:1
Closest name
Royal Blue
ΔE2000 9.4
Chroma
34.6
LCH, 0–130ish
OKLCH L
0.499
perceptual lightness
Tailwind
slate
500 · ΔE 11
Web-safe
#336699
nearest of 216
Where it sits
Hue210° of 360°
Saturation54%
Lightness40%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #2f669c.

Temperature
Warm ← → Cool100% 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%
Green76%
Blue19%

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

Every format

HEX#2f669c
HEX (8-digit)#2f669cff
RGBrgb(47, 102, 156)
RGBArgba(47, 102, 156, 1)
HSLhsl(210, 54%, 40%)
HSV / HSBhsv(210, 70%, 61%)
HWBhwb(210 18% 39%)
CMYKcmyk(70%, 35%, 0%, 39%)
LABlab(42.0 0.3 -34.6)
LCHlch(42.0 34.6 270.4)
OKLCHoklch(0.499 0.104 250.3)
XYZ (D65)xyz(11.92, 12.51, 33.23)
Decimal3106460
Display P3color(display-p3 0.184 0.400 0.612)
Web-safe#336699

Copy-ready code

every platformclick to select
/* CSS */
color: #2f669c;
background-color: #2f669c;
/* CSS custom property */
--brand: #2f669c;
/* Tailwind (arbitrary) */
class="text-[#2f669c] bg-[#2f669c]"
/* SCSS */
$brand: #2f669c;
/* SwiftUI */
Color(red: 0.184, green: 0.400, blue: 0.612)
/* UIKit */
UIColor(red: 0.184, green: 0.400, blue: 0.612, alpha: 1)
/* Android XML */
<color name="brand">#2F669C</color>
/* Android Compose */
Color(0xFF2F669C)
/* Flutter */
Color(0xFF2F669C)
/* Python / OpenCV (BGR) */
(156, 102, 47)
/* Python / PIL (RGB) */
(47, 102, 156)
/* Java AWT */
new Color(47, 102, 156)
/* .NET */
Color.FromArgb(255, 47, 102, 156)
/* OpenGL / Unity (0–1) */
(0.1843f, 0.4000f, 0.6118f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{47,102,156}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #2f669c 85%, white);
border-color: color-mix(in oklab, #2f669c 40%, transparent);
/* theme-aware in one line */
color: light-dark(#1E4062, #D3E1EE);
/* relative colour syntax */
--hover: hsl(from #2f669c 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: #F4F7FB;
  --brand-100: #E9F0F6;
  --brand-200: #CEDEEE;
  --brand-300: #A9C7E5;
  --brand-400: #7EABD8;
  --brand-500: #538FCB;
  --brand-600: #397BBC;
  --brand-700: #2f669c;
  --brand-800: #26527D;
  --brand-900: #1F3E5B;
  --brand-950: #132639;
  --brand: #2f669c;
  --brand-ink: #ffffff;
  --brand-surface: #F4F7FA;
  --brand-border: #C0D6EC;
  --brand-hover: #275481;
  --brand-pressed: #1E4265;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141C24;
    --brand-ink: #D3E1EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4F7FB',
        100: '#E9F0F6',
        200: '#CEDEEE',
        300: '#A9C7E5',
        400: '#7EABD8',
        500: '#538FCB',
        600: '#397BBC',
        700: '#2f669c',
        800: '#26527D',
        900: '#1F3E5B',
        950: '#132639',
        DEFAULT: '#2f669c',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4F7FB,
  '100': #E9F0F6,
  '200': #CEDEEE,
  '300': #A9C7E5,
  '400': #7EABD8,
  '500': #538FCB,
  '600': #397BBC,
  '700': #2f669c,
  '800': #26527D,
  '900': #1F3E5B,
  '950': #132639,
);
$brand-base: #2f669c;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4F7FB", "$type": "color" },
      "100": { "$value": "#E9F0F6", "$type": "color" },
      "200": { "$value": "#CEDEEE", "$type": "color" },
      "300": { "$value": "#A9C7E5", "$type": "color" },
      "400": { "$value": "#7EABD8", "$type": "color" },
      "500": { "$value": "#538FCB", "$type": "color" },
      "600": { "$value": "#397BBC", "$type": "color" },
      "700": { "$value": "#2f669c", "$type": "color" },
      "800": { "$value": "#26527D", "$type": "color" },
      "900": { "$value": "#1F3E5B", "$type": "color" },
      "950": { "$value": "#132639", "$type": "color" }
    },
    "brandInk": { "$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 #2f669c · 6.00:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.00:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.50:1
AA fail · AA large pass · AAA fail
Reading the other direction: #2f669c as text scores 6.00:1 on white and 3.50:1 on black.
Best tinted ink on it, if plain black or white feels flat: #EBF2F9 at 5.31:1.

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
#2f669c · 6.00:1
AA on whitealready passes
#2f669c
The quick fox
#295988 · 7.29:1
AAA on white−5% L
#295988
The quick fox
#3778B7 · 4.53:1
AA on black+7% L
#3778B7
The quick fox
#659CD1 · 7.23:1
AAA on black+21% L
#659CD1

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #2F669C 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
#2f669c on white: 6.00:1
AA ✓ pass · AA-large · AAA
Aa
#2f669c on black: 3.50:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #2f669c as text on that neutral, and that neutral as text on #2f669c.

NeutralRatioBoth directions
White6.00:1AaAa
Slate 505.73:1AaAa
Slate 1005.47:1AaAa
Slate 2004.86:1AaAa
Slate 3004.04:1AaAa
Slate 4002.34:1AaAa
Slate 5001.26:1AaAa
Slate 6001.26:1AaAa
Slate 7001.73:1AaAa
Slate 8002.44:1AaAa
Slate 9002.98:1AaAa
Black3.50:1AaAa
Colour vision deficiency
true color
protanopia · #4E699E
deuteranopia · #3F5E9B
tritanopia · #00737A

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. #2f669c is pinned to step 700; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F4F7FB
#E9F0F6
#CEDEEE
#A9C7E5
#7EABD8
#538FCB
#397BBC
#2f669c
#26527D
#1F3E5B
#132639
Base = 700Lightest = 50 · #F4F7FBDarkest = 950 · #132639Text step on white = 700
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 0.026 250.3);
  --brand-100: oklch(0.94 0.042 250.3);
  --brand-200: oklch(0.88 0.063 250.3);
  --brand-300: oklch(0.80 0.081 250.3);
  --brand-400: oklch(0.72 0.096 250.3);
  --brand-500: oklch(0.64 0.104 250.3);
  --brand-600: oklch(0.56 0.104 250.3);
  --brand-700: oklch(0.48 0.098 250.3);
  --brand-800: oklch(0.40 0.088 250.3);
  --brand-900: oklch(0.32 0.073 250.3);
  --brand-950: oklch(0.24 0.057 250.3);
}

Colors that work with #2f669c

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#F4F7FA
Tinted page background
Border#C0D6EC
Hairlines and dividers
Muted text#4B739B
Captions on the surface
Accent#A0482B
Second voice, not a rival
Dark variant#1E4062
Hover, pressed, headers
Light variant#EBF2F9
Selected rows, tints
Dark surface#141C24
Dark-mode background
Hover#275481
One step down in lightness
Pressed#1E4265
Two steps down
Disabled#889EB3
Chroma pulled out
Focus ring#2970B7
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 #2f669c

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
  • 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.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. 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
  • EnergyMedium-high
  • Weight60/100
  • 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#9C652F
Analogous left#2F9C9B
Analogous right#2F309C
Split-complement 1#9C2F30
Split-complement 2#9C9B2F
Triadic 1#9C2F66
Triadic 2#669C2F
Tetradic#9B2F9C
On the wheel
Base+30°−30°+120°+240°+180°210°

#2f669c sits at 210°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red18.4%
Green40.0%
Blue61.2%
R · 0–255
47
0x2f
G · 0–255
102
0x66
B · 0–255
156
0x9c

CMYK percentages

Cyan69.9%
Magenta34.6%
Yellow0.0%
Key (black)38.8%

Total ink coverage is 143%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#2f669c text on a black background

contrast 3.50:1

Card sample

#2f669c text on a white background

contrast 6.00:1

Card sample

#2f669c on grey

5.47:1

#2f669c on its own surface

5.58:1

#2f669c on its dark surface

2.87:1

CSS3 live lab

Text font color

The quick brown fox

color: #2f669c;
Background color
Panel with #2f669c background
background-color: #2f669c;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #2f669c;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(47, 102, 156, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(47, 102, 156, 0.45);
Border & gradient
Gradient panel
border: 3px solid #2f669c;
background: linear-gradient(135deg, #2f669c, #412F9C);
Gradient text

Gradient headline

background: linear-gradient(90deg, #2f669c, #5C2F9C);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #2f669c;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #2f669c;
caret-color: #2f669c;
Left rule
Pull quote or callout
border-left: 4px solid #2f669c;
Ring + tint
Selected chip
background: #EBF2F9;
box-shadow: inset 0 0 0 2px #2f669c;
Conic badge
68%
background: conic-gradient(#2f669c 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #2f669c 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(47, 102, 156, 0.5)
rgb(47 102 156 / 50%)
#2f669c80
hsl(210 54% 40% / 50%)
color-mix(in srgb, #2f669c 50%, transparent)
Alpha8-digit hexFlat on white
10%#2f669c1a#EAF0F5
20%#2f669c33#D5E0EB
40%#2f669c66#ACC2D7
60%#2f669c99#82A3C4
80%#2f669ccc#5985B0

Gradients from #2f669c

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, #4285C6, #2f669c 45%, #1E4062);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #2f669c, #3F2884);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #2f669c, #9C652F);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #5A94CD 0%, #2f669c 45%, #1E4062 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F7FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #3BC3B7 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #4036B4 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #1E4062 0%, transparent 65%), #2f669c;

Monochromatic scale

Palettes built from #2f669c

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.

#2f669c 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 3.50:1 — lift it to #3778B7 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.

#2f669c, answered

What color is #2f669c?

#2f669c is a dark vivid blue, closest to Royal Blue (ΔE2000 9.4). It sits at 210° on the hue wheel with 54% saturation and 40% lightness, which reads as cool.

What is the RGB value of #2f669c?

rgb(47, 102, 156) — 47 red, 102 green and 156 blue out of 255, or 18.4% / 40% / 61.2% by channel.

What is #2f669c in HSL and HSV?

hsl(210, 54%, 40%) and hsv(210, 70%, 61%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #2f669c a light or a dark color?

It is a dark color. Relative luminance is 0.1251 and perceived brightness is 38%, so white text on it reaches 6.00:1.

Should I use black or white text on #2f669c?

White. It scores 6.00:1 against #2f669c, versus 3.50:1 for black — AA at any size.

Is #2f669c accessible on a white background?

#2f669c on white scores 6.00:1, which clears AA at every size but not AAA.

What is the complementary color of #2f669c?

#9C652F sits directly opposite on the wheel. Softer options are the split-complements #9C2F30 and #9C9B2F, which give the same contrast with far less vibration.

What colors go well with #2f669c?

For interface work: #F4F7FA as the surface, #C0D6EC for borders, #4B739B for secondary text, #A0482B as an accent and #1E4062 for hover and pressed states. For a palette, the analogous pair #2F9C9B and #2F309C stays calm, while #9C652F is the loudest partner.

What is #2f669c in CMYK for printing?

cmyk(70%, 35%, 0%, 39%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #2f669c warm or cool?

Cool — it scores 100 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #2F3E9C; nudged cooler, #27578A.

Which Tailwind color is closest to #2f669c?

The slate family — its 500 step is #64748b, ΔE2000 11 away. That is a visible difference, so define #2f669c as a custom token rather than reaching for the built-in.

How do I use #2f669c in Tailwind CSS?

Inline it as an arbitrary value with bg-[#2f669c] or text-[#2f669c], 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 #2f669c with 50% opacity?

rgba(47, 102, 156, 0.5), or #2f669c80 in eight-digit hex. Over white that composites to #97B3CE; over black, #18334E.

Is #2f669c a web-safe color?

No. The nearest web-safe colour is #336699, ΔE2000 0.5 away. The palette only matters for legacy displays and some email clients now.

What does the color #2f669c 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 #2f669c?

The safest is same-hue elevation: linear-gradient(135deg, #4285C6, #2f669c 45%, #1E4062). For more colour, a short hue run to #3F2884 keeps it rich without turning muddy.

Work with #2f669c in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #2f669c at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.