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Recognised as Colour

#40DDDB

  • #40DDDB
  • Cyan
  • Light
  • Nearest: Medium turquoise

#40DDDB is a cyan with RGB values 64, 221, 219 and HSL 179°, 70%, 56%. It is a light colour, so black text on it reaches 12.6:1 contrast (AAA for normal text). The nearest named colour is Medium turquoise.

Colour values

#40DDDB#40DDDB
HEX#40DDDB
RGBrgb(64, 221, 219)
RGB (0–1)0.251, 0.8667, 0.8588
RGB percentages25.1%, 86.7%, 85.9%
HSLhsl(179.2, 69.8%, 55.9%)
HSV / HSBhsv(179.2, 71%, 86.7%)
CMYK71%, 0%, 0.9%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,251,099
CSS custom property--colour: #40DDDB;

Brightness & contrast

Relative luminance0.57917WCAG 2.x, 0 is black and 1 is white
Perceived brightness188 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 12.58:1
Contrast with white1.67:1WCAG normal text: Fail
Contrast with black12.58:1WCAG normal text: AAA
Greyscale equivalent#BBBBBB
Inverted#BF2224

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CFD2DBno red cones; affects about 1% of men; ΔE 41 from the original
Deuteranopia#B8C1DCno green cones; the most common form, about 1% of men; ΔE 42.4 from the original
Tritanopia#00E4DCno blue cones; rare, and affects men and women equally; ΔE 7.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.67:1WCAG large text: Fail
Contrast with black, large text12.58:1WCAG large text: AAA

Named colours

Medium turquoise · ΔE 5.1Dark turquoise · ΔE 6.1Turquoise · ΔE 8Aqua · ΔE 13.8Cyan · ΔE 13.8Light seagreen · ΔE 15.7
Nearest named CSS colourMedium turquoise (#48D1CC)ΔE 5.08, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DD4042
Analogous#40DD8D, #4091DD
Triadic#DB40DD, #DDDB40
Split complementary#DD4091, #DD8D40
Tetradic#8C40DD, #DD4042, #90DD40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDFCFC
Lighter +30%#C2F4F3
Lighter +20%#97ECEB
Lighter +10%#6BE5E3
Darker −10%#23C7C5
Darker −20%#1C9B9A
Darker −30%#14706F
Darker −40%#0C4544
More saturated +25%#24F9F6
Less saturated −25%#5CC1C0

Channel breakdown

R64
G221
B219
Red64 (25.1%)
Green221 (86.7%)
Blue219 (85.9%)
Hue179.24°
Saturation (HSL)69.78%
Lightness55.88%
Dominant channelGreen
Hex per channelR 40 · G DD · B DB

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Every value on this page was computed from “40dddb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.