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Colour

#55BBDD

  • #55BBDD
  • Cyan
  • Dark
  • Nearest: Sky blue

#55BBDD is a cyan with RGB values 85, 187, 221 and HSL 195°, 67%, 60%. It is a dark colour, so black text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#55BBDD#55BBDD
HEX#55BBDD
HEX (short)#5BD
RGBrgb(85, 187, 221)
RGB (0–1)0.3333, 0.7333, 0.8667
RGB percentages33.3%, 73.3%, 86.7%
HSLhsl(195, 66.7%, 60%)
HSV / HSBhsv(195, 61.5%, 86.7%)
CMYK61.5%, 15.4%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,618,653
CSS custom property--colour: #55BBDD;

Brightness & contrast

Relative luminance0.42692WCAG 2.x, 0 is black and 1 is white
Perceived brightness168.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.54:1
Contrast with white2.2:1WCAG normal text: Fail
Contrast with black9.54:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#AA4422

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A7B7DFno red cones; affects about 1% of men; ΔE 23.4 from the original
Deuteranopia#94A8DDno green cones; the most common form, about 1% of men; ΔE 25.3 from the original
Tritanopia#00C6C6no blue cones; rare, and affects men and women equally; ΔE 24.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.2:1WCAG large text: Fail
Contrast with black, large text9.54:1WCAG large text: AAA

Named colours

Sky blue · ΔE 10.3Light skyblue · ΔE 12.4Deep skyblue · ΔE 16.8Light blue · ΔE 21Cadetblue · ΔE 21.1Light steelblue · ΔE 22.4
Nearest named CSS colourSky blue (#87CEEB)ΔE 10.28, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DD7755
Analogous#55DDBB, #5577DD
Triadic#DD55BB, #BBDD55
Split complementary#DD5577, #DDBB55
Tetradic#BB55DD, #DD7755, #77DD55

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D5EEF7
Lighter +20%#AADDEE
Lighter +10%#7FCCE5
Darker −10%#2AAAD5
Darker −20%#2288AA
Darker −30%#196680
Darker −40%#114455
More saturated +25%#3BC8F7
Less saturated −25%#6EAEC3

Channel breakdown

R85
G187
B221
Red85 (33.3%)
Green187 (73.3%)
Blue221 (86.7%)
Hue195°
Saturation (HSL)66.67%
Lightness60%
Dominant channelBlue
Hex per channelR 55 · G BB · B DD

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Every value on this page was computed from “55bbdd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.