Nerdulator> put something in

Recognised as Colour

#818AAA

  • #818AAA
  • Blue
  • Dark
  • Nearest: Light slate grey

#818AAA is a blue with RGB values 129, 138, 170 and HSL 227°, 19%, 59%. It is a dark colour, so black text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Light slate grey.

Colour values

#818AAA#818AAA
HEX#818AAA
RGBrgb(129, 138, 170)
RGB (0–1)0.5059, 0.5412, 0.6667
RGB percentages50.6%, 54.1%, 66.7%
HSLhsl(226.8, 19.4%, 58.6%)
HSV / HSBhsv(226.8, 24.1%, 66.7%)
CMYK24.1%, 18.8%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,489,642
CSS custom property--colour: #818AAA;

Brightness & contrast

Relative luminance0.25746WCAG 2.x, 0 is black and 1 is white
Perceived brightness139.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.15:1
Contrast with white3.42:1WCAG normal text: Fail
Contrast with black6.15:1WCAG normal text: AA
Greyscale equivalent#8A8A8A
Inverted#7E7555

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#818DABno red cones; affects about 1% of men; ΔE 1.9 from the original
Deuteranopia#7E89A9no green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#779095no blue cones; rare, and affects men and women equally; ΔE 17 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.42:1WCAG large text: AA
Contrast with black, large text6.15:1WCAG large text: AAA

Named colours

Light slate grey · ΔE 9.4Slate grey · ΔE 10.8Steel blue · ΔE 17.2Gray · ΔE 18.9Light steelblue · ΔE 21.5Dark grey · ΔE 21.7
Nearest named CSS colourLight slate grey (#778899)ΔE 9.43, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AAA181
Analogous#819EAA, #8D81AA
Triadic#AA818A, #8AAA81
Split complementary#AA8D81, #9EAA81
Tetradic#AA819E, #AAA181, #81AA8D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FBFBFC
Lighter +30%#DCDFE8
Lighter +20%#BEC3D3
Lighter +10%#9FA6BF
Darker −10%#646E94
Darker −20%#4F5876
Darker −30%#3B4157
Darker −40%#262A39
More saturated +25%#677BC4
Less saturated −25%#959595

Channel breakdown

R129
G138
B170
Red129 (50.6%)
Green138 (54.1%)
Blue170 (66.7%)
Hue226.83°
Saturation (HSL)19.43%
Lightness58.63%
Dominant channelBlue
Hex per channelR 81 · G 8A · B AA

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 “818aaa” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.