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Colour

#818DAD

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

#818DAD is a blue with RGB values 129, 141, 173 and HSL 224°, 21%, 59%. It is a dark colour, so black text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Light slate grey.

Colour values

#818DAD#818DAD
HEX#818DAD
RGBrgb(129, 141, 173)
RGB (0–1)0.5059, 0.5529, 0.6784
RGB percentages50.6%, 55.3%, 67.8%
HSLhsl(223.6, 21.2%, 59.2%)
HSV / HSBhsv(223.6, 25.4%, 67.8%)
CMYK25.4%, 18.5%, 0%, 32.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,490,413
CSS custom property--colour: #818DAD;

Brightness & contrast

Relative luminance0.26734WCAG 2.x, 0 is black and 1 is white
Perceived brightness141.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.35:1
Contrast with white3.31:1WCAG normal text: Fail
Contrast with black6.35:1WCAG normal text: AA
Greyscale equivalent#8D8D8D
Inverted#7E7252

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#838FAEno red cones; affects about 1% of men; ΔE 1 from the original
Deuteranopia#808CACno green cones; the most common form, about 1% of men; ΔE 0.4 from the original
Tritanopia#769398no blue cones; rare, and affects men and women equally; ΔE 17.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.31:1WCAG large text: AA
Contrast with black, large text6.35:1WCAG large text: AAA

Named colours

Light slate grey · ΔE 9.3Slate grey · ΔE 10.9Steel blue · ΔE 16.8Gray · ΔE 19.2Light steelblue · ΔE 20.4Dark grey · ΔE 21.3
Nearest named CSS colourLight slate grey (#778899)ΔE 9.28, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#ADA181
Analogous#81A3AD, #8B81AD
Triadic#AD818D, #8DAD81
Split complementary#AD8B81, #A3AD81
Tetradic#AD81A3, #ADA181, #81AD8B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FDFDFD
Lighter +30%#DEE1E9
Lighter +20%#BFC5D5
Lighter +10%#A0A9C1
Darker −10%#637198
Darker −20%#4F5A79
Darker −30%#3B435A
Darker −40%#272C3B
More saturated +25%#6781C7
Less saturated −25%#979797

Channel breakdown

R129
G141
B173
Red129 (50.6%)
Green141 (55.3%)
Blue173 (67.8%)
Hue223.64°
Saturation (HSL)21.15%
Lightness59.22%
Dominant channelBlue
Hex per channelR 81 · G 8D · B AD

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Every value on this page was computed from “818dad” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.