Nerdulator> put something in

Recognised as Colour

#428DB9

  • #428DB9
  • Blue
  • Dark
  • Nearest: Steel blue

#428DB9 is a blue with RGB values 66, 141, 185 and HSL 202°, 47%, 49%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#428DB9#428DB9
HEX#428DB9
RGBrgb(66, 141, 185)
RGB (0–1)0.2588, 0.5529, 0.7255
RGB percentages25.9%, 55.3%, 72.5%
HSLhsl(202.2, 47.4%, 49.2%)
HSV / HSBhsv(202.2, 64.3%, 72.5%)
CMYK64.3%, 23.8%, 0%, 27.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,361,657
CSS custom property--colour: #428DB9;

Brightness & contrast

Relative luminance0.23711WCAG 2.x, 0 is black and 1 is white
Perceived brightness129.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.74:1
Contrast with white3.66:1WCAG normal text: Fail
Contrast with black5.74:1WCAG normal text: AA
Greyscale equivalent#808080
Inverted#BD7246

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#788CBBno red cones; affects about 1% of men; ΔE 14.5 from the original
Deuteranopia#6880B8no green cones; the most common form, about 1% of men; ΔE 16 from the original
Tritanopia#00989Cno blue cones; rare, and affects men and women equally; ΔE 28.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.66:1WCAG large text: AA
Contrast with black, large text5.74:1WCAG large text: AAA

Named colours

Steel blue · ΔE 6.8Light slate grey · ΔE 20.1Slate grey · ΔE 20.9Deep skyblue · ΔE 22.5Light skyblue · ΔE 24Cadetblue · ΔE 25.2
Nearest named CSS colourSteel blue (#4682B4)ΔE 6.76, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B96E42
Analogous#42B9A9, #4252B9
Triadic#B9428D, #8DB942
Split complementary#B94252, #B9A942
Tetradic#A942B9, #B96E42, #52B942

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D6E7F1
Lighter +30%#B1D1E3
Lighter +20%#8BBAD6
Lighter +10%#66A4C8
Darker −10%#357093
Darker −20%#27546E
Darker −30%#1A3748
Darker −40%#0C1A23
More saturated +25%#2395D8
Less saturated −25%#61859A

Channel breakdown

R66
G141
B185
Red66 (25.9%)
Green141 (55.3%)
Blue185 (72.5%)
Hue202.18°
Saturation (HSL)47.41%
Lightness49.22%
Dominant channelBlue
Hex per channelR 42 · G 8D · B B9

Keep nerding

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

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “428db9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.