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Colour

#18ADB5

  • #18ADB5
  • Cyan
  • Dark
  • Nearest: Light seagreen

#18ADB5 is a cyan with RGB values 24, 173, 181 and HSL 183°, 77%, 40%. It is a dark colour, so black text on it reaches 7.7:1 contrast (AAA for normal text). The nearest named colour is Light seagreen.

Colour values

#18ADB5#18ADB5
HEX#18ADB5
RGBrgb(24, 173, 181)
RGB (0–1)0.0941, 0.6784, 0.7098
RGB percentages9.4%, 67.8%, 71%
HSLhsl(183.1, 76.6%, 40.2%)
HSV / HSBhsv(183.1, 86.7%, 71%)
CMYK86.7%, 4.4%, 0%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,617,333
CSS custom property--colour: #18ADB5;

Brightness & contrast

Relative luminance0.33418WCAG 2.x, 0 is black and 1 is white
Perceived brightness146.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.68:1
Contrast with white2.73:1WCAG normal text: Fail
Contrast with black7.68:1WCAG normal text: AAA
Greyscale equivalent#8E8E8E
Inverted#E7524A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9FA5B6no red cones; affects about 1% of men; ΔE 34.3 from the original
Deuteranopia#8B96B6no green cones; the most common form, about 1% of men; ΔE 35.9 from the original
Tritanopia#00B4AFno blue cones; rare, and affects men and women equally; ΔE 8.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.73:1WCAG large text: Fail
Contrast with black, large text7.68:1WCAG large text: AAA

Named colours

Light seagreen · ΔE 9.6Dark turquoise · ΔE 13.2Dark cyan · ΔE 13.5Medium turquoise · ΔE 14.6Cadetblue · ΔE 14.9Teal · ΔE 17.7
Nearest named CSS colourLight seagreen (#20B2AA)ΔE 9.6, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B52018
Analogous#18B56E, #185FB5
Triadic#B518AD, #ADB518
Split complementary#B5185F, #B56E18
Tetradic#6E18B5, #B52018, #5FB518

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6EFF3
Lighter +30%#79E7ED
Lighter +20%#4CDFE7
Lighter +10%#1FD7E1
Darker −10%#128288
Darker −20%#0C575B
Darker −30%#062C2E
Darker −40%#000101
More saturated +25%#00C3CD
Less saturated −25%#32969B

Channel breakdown

R24
G173
B181
Red24 (9.4%)
Green173 (67.8%)
Blue181 (71%)
Hue183.06°
Saturation (HSL)76.59%
Lightness40.2%
Dominant channelBlue
Hex per channelR 18 · G AD · B B5

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Every value on this page was computed from “18adb5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.