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Recognised as Colour

#99ADDD

  • #99ADDD
  • Blue
  • Dark
  • Nearest: Light steelblue

#99ADDD is a blue with RGB values 153, 173, 221 and HSL 222°, 50%, 73%. It is a dark colour, so black text on it reaches 9.4:1 contrast (AAA for normal text). The nearest named colour is Light steelblue.

Colour values

#99ADDD#99ADDD
HEX#99ADDD
RGBrgb(153, 173, 221)
RGB (0–1)0.6, 0.6784, 0.8667
RGB percentages60%, 67.8%, 86.7%
HSLhsl(222.4, 50%, 73.3%)
HSV / HSBhsv(222.4, 30.8%, 86.7%)
CMYK30.8%, 21.7%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,071,517
CSS custom property--colour: #99ADDD;

Brightness & contrast

Relative luminance0.4188WCAG 2.x, 0 is black and 1 is white
Perceived brightness173.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.38:1
Contrast with white2.24:1WCAG normal text: Fail
Contrast with black9.38:1WCAG normal text: AAA
Greyscale equivalent#ACACAC
Inverted#665222

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9EB0DFno red cones; affects about 1% of men; ΔE 1.5 from the original
Deuteranopia#98AADCno green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#86B7BDno blue cones; rare, and affects men and women equally; ΔE 26.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.24:1WCAG large text: Fail
Contrast with black, large text9.38:1WCAG large text: AAA

Named colours

Light steelblue · ΔE 14.6Light skyblue · ΔE 17.5Steel blue · ΔE 20.9Sky blue · ΔE 21.4Thistle · ΔE 21.6Light slate grey · ΔE 22.3
Nearest named CSS colourLight steelblue (#B0C4DE)ΔE 14.63, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DDC999
Analogous#99CFDD, #A799DD
Triadic#DD99AD, #ADDD99
Split complementary#DDA799, #CFDD99
Tetradic#DD99CF, #DDC999, #99DDA7

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#E6EBF7
Lighter +10%#BFCCEA
Darker −10%#738ED0
Darker −20%#4D70C4
Darker −30%#3758A6
Darker −40%#2A4480
More saturated +25%#88A6EE
Less saturated −25%#AAB4CC

Channel breakdown

R153
G173
B221
Red153 (60%)
Green173 (67.8%)
Blue221 (86.7%)
Hue222.35°
Saturation (HSL)50%
Lightness73.33%
Dominant channelBlue
Hex per channelR 99 · G AD · B DD

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Every value on this page was computed from “99addd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.