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Recognised as Colour

#8581B0

  • #8581B0
  • Blue
  • Dark
  • Nearest: Steel blue

#8581B0 is a blue with RGB values 133, 129, 176 and HSL 245°, 23%, 60%. 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

#8581B0#8581B0
HEX#8581B0
RGBrgb(133, 129, 176)
RGB (0–1)0.5216, 0.5059, 0.6902
RGB percentages52.2%, 50.6%, 69%
HSLhsl(245.1, 22.9%, 59.8%)
HSV / HSBhsv(245.1, 26.7%, 69%)
CMYK24.4%, 26.7%, 0%, 31%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,749,488
CSS custom property--colour: #8581B0;

Brightness & contrast

Relative luminance0.23822WCAG 2.x, 0 is black and 1 is white
Perceived brightness136.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.76:1
Contrast with white3.64:1WCAG normal text: Fail
Contrast with black5.76:1WCAG normal text: AA
Greyscale equivalent#858585
Inverted#7A7E4F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7587B2no red cones; affects about 1% of men; ΔE 7.9 from the original
Deuteranopia#7485AFno green cones; the most common form, about 1% of men; ΔE 7.8 from the original
Tritanopia#7C8991no blue cones; rare, and affects men and women equally; ΔE 23.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.64:1WCAG large text: AA
Contrast with black, large text5.76:1WCAG large text: AAA

Named colours

Steel blue · ΔE 18.2Light slate grey · ΔE 19.3Slate grey · ΔE 19.9Cornflower blue · ΔE 25.9Plum · ΔE 27.1Gray · ΔE 27.1
Nearest named CSS colourSteel blue (#4682B4)ΔE 18.2, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#ACB081
Analogous#8194B0, #9D81B0
Triadic#B08581, #81B085
Split complementary#B09D81, #94B081
Tetradic#B08194, #ACB081, #81B09D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FEFEFF
Lighter +30%#E0DFEB
Lighter +20%#C2C0D7
Lighter +10%#A3A0C4
Darker −10%#67629C
Darker −20%#524E7D
Darker −30%#3E3B5D
Darker −40%#29273E
More saturated +25%#7067CA
Less saturated −25%#999999

Channel breakdown

R133
G129
B176
Red133 (52.2%)
Green129 (50.6%)
Blue176 (69%)
Hue245.11°
Saturation (HSL)22.93%
Lightness59.8%
Dominant channelBlue
Hex per channelR 85 · G 81 · B B0

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Every value on this page was computed from “8581b0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.