Recognised as Colour

#428EBB

#428EBB
Blue
Dark
Nearest: Steel blue

#428EBB is a blue with RGB values 66, 142, 187 and HSL 202°, 48%, 50%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#428EBB#428EBB

HEX#428EBB

RGBrgb(66, 142, 187)

RGB (0–1)0.2588, 0.5569, 0.7333

RGB percentages25.9%, 55.7%, 73.3%

HSLhsl(202.3, 47.8%, 49.6%)

HSV / HSBhsv(202.3, 64.7%, 73.3%)

CMYK64.7%, 24.1%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,361,915

CSS custom property--colour: #428EBB;

Brightness & contrast

Relative luminance0.24092WCAG 2.x, 0 is black and 1 is white

Perceived brightness130.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.82:1

Contrast with white3.61:1WCAG normal text: Fail

Contrast with black5.82:1WCAG normal text: AA

Greyscale equivalent#818181

Inverted#BD7144

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#798DBDno red cones; affects about 1% of men; ΔE 14.7 from the original

Deuteranopia#6881BAno green cones; the most common form, about 1% of men; ΔE 15.9 from the original

Tritanopia#009A9Dno blue cones; rare, and affects men and women equally; ΔE 29.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text3.61:1WCAG large text: AA

Contrast with black, large text5.82:1WCAG large text: AAA

Named colours

Steel blue · ΔE 6.7 Light slate grey · ΔE 20.6 Slate grey · ΔE 21.4 Deep skyblue · ΔE 22 Light skyblue · ΔE 23.7 Sky blue · ΔE 25.4

Nearest named CSS colourSteel blue (#4682B4)ΔE 6.72, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#BB6F42

Analogous#42BBAB, #4252BB

Triadic#BB428E, #8EBB42

Split complementary#BB4252, #BBAB42

Tetradic#AB42BB, #BB6F42, #52BB42

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#D8E8F1

Lighter +30%#B2D1E4

Lighter +20%#8CBBD7

Lighter +10%#67A5C9

Darker −10%#357195

Darker −20%#275570

Darker −30%#1A384A

Darker −40%#0D1C24

More saturated +25%#2296DB

Less saturated −25%#62869B

Channel breakdown

R66

G142

B187

Red66 (25.9%)

Green142 (55.7%)

Blue187 (73.3%)

Hue202.31°

Saturation (HSL)47.83%

Lightness49.61%

Dominant channelBlue

Hex per channelR 42 · G 8E · B BB

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#428EBB

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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