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Recognised as Colour

#406B66

  • #406B66
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#406B66 is a cyan with RGB values 64, 107, 102 and HSL 173°, 25%, 34%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Dark slate grey.

Colour values

#406B66#406B66
HEX#406B66
RGBrgb(64, 107, 102)
RGB (0–1)0.251, 0.4196, 0.4
RGB percentages25.1%, 42%, 40%
HSLhsl(173, 25.1%, 33.5%)
HSV / HSBhsv(173, 40.2%, 42%)
CMYK40.2%, 0%, 4.7%, 58%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,221,798
CSS custom property--colour: #406B66;

Brightness & contrast

Relative luminance0.12565WCAG 2.x, 0 is black and 1 is white
Perceived brightness95.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.98:1
Contrast with white5.98:1WCAG normal text: AA
Contrast with black3.51:1WCAG normal text: Fail
Greyscale equivalent#616161
Inverted#BF9499

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#676766no red cones; affects about 1% of men; ΔE 16.3 from the original
Deuteranopia#5F6167no green cones; the most common form, about 1% of men; ΔE 16.9 from the original
Tritanopia#306D69no blue cones; rare, and affects men and women equally; ΔE 4.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.98:1WCAG large text: AAA
Contrast with black, large text3.51:1WCAG large text: AA

Named colours

Dark slate grey · ΔE 11.9Teal · ΔE 15.5Dim grey · ΔE 16.5Dark cyan · ΔE 19Slate grey · ΔE 19.7Gray · ΔE 20
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.88, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6B4045
Analogous#406B51, #405B6B
Triadic#66406B, #6B6640
Split complementary#6B405B, #6B5140
Tetradic#51406B, #6B4045, #5B6B40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ABCCC9
Lighter +30%#8BB9B4
Lighter +20%#6BA69F
Lighter +10%#538B84
Darker −10%#2D4B48
Darker −20%#1A2B29
Darker −30%#070B0B
Darker −40%#000000
More saturated +25%#2B8076
Less saturated −25%#555656

Channel breakdown

R64
G107
B102
Red64 (25.1%)
Green107 (42%)
Blue102 (40%)
Hue173.02°
Saturation (HSL)25.15%
Lightness33.53%
Dominant channelGreen
Hex per channelR 40 · G 6B · B 66

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Every value on this page was computed from “406b66” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.