Nerdulator> put something in

Recognised as Colour

#66B6E3

  • #66B6E3
  • Blue
  • Dark
  • Nearest: Light skyblue

#66B6E3 is a blue with RGB values 102, 182, 227 and HSL 202°, 69%, 65%. 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 skyblue.

Colour values

#66B6E3#66B6E3
HEX#66B6E3
RGBrgb(102, 182, 227)
RGB (0–1)0.4, 0.7137, 0.8902
RGB percentages40%, 71.4%, 89%
HSLhsl(201.6, 69.1%, 64.5%)
HSV / HSBhsv(201.6, 55.1%, 89%)
CMYK55.1%, 19.8%, 0%, 11%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,731,491
CSS custom property--colour: #66B6E3;

Brightness & contrast

Relative luminance0.41827WCAG 2.x, 0 is black and 1 is white
Perceived brightness168.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.37:1
Contrast with white2.24:1WCAG normal text: Fail
Contrast with black9.37:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#99491C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A1B4E5no red cones; affects about 1% of men; ΔE 17 from the original
Deuteranopia#8FA7E2no green cones; the most common form, about 1% of men; ΔE 18.1 from the original
Tritanopia#00C2C5no blue cones; rare, and affects men and women equally; ΔE 31.3 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 text9.37:1WCAG large text: AAA

Named colours

Light skyblue · ΔE 9.2Sky blue · ΔE 12.5Deep skyblue · ΔE 13.9Light steelblue · ΔE 19.8Steel blue · ΔE 20Light blue · ΔE 22.7
Nearest named CSS colourLight skyblue (#87CEFA)ΔE 9.17, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E39366
Analogous#66E3D2, #6677E3
Triadic#E366B6, #B6E366
Split complementary#E36677, #E3D266
Tetradic#D266E3, #E39366, #77E366

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E7F4FB
Lighter +20%#BCDFF3
Lighter +10%#91CBEB
Darker −10%#3BA1DB
Darker −20%#2387C0
Darker −30%#1B6995
Darker −40%#134B6A
More saturated +25%#4FBCFA
Less saturated −25%#7DB0CC

Channel breakdown

R102
G182
B227
Red102 (40%)
Green182 (71.4%)
Blue227 (89%)
Hue201.6°
Saturation (HSL)69.06%
Lightness64.51%
Dominant channelBlue
Hex per channelR 66 · G B6 · B E3

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 “66b6e3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.