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Colour

#01818B

  • #01818B
  • Cyan
  • Dark
  • Nearest: Teal

#01818B is a cyan with RGB values 1, 129, 139 and HSL 184°, 99%, 27%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Teal.

Colour values

#01818B#01818B
HEX#01818B
RGBrgb(1, 129, 139)
RGB (0–1)0.0039, 0.5059, 0.5451
RGB percentages0.4%, 50.6%, 54.5%
HSLhsl(184.3, 98.6%, 27.5%)
HSV / HSBhsv(184.3, 99.3%, 54.5%)
CMYK99.3%, 7.2%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer98,699
CSS custom property--colour: #01818B;

Brightness & contrast

Relative luminance0.17571WCAG 2.x, 0 is black and 1 is white
Perceived brightness109.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.65:1
Contrast with white4.65:1WCAG normal text: AA
Contrast with black4.51:1WCAG normal text: AA
Greyscale equivalent#676767
Inverted#FE7E74

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#757B8Cno red cones; affects about 1% of men; ΔE 27.5 from the original
Deuteranopia#656F8Bno green cones; the most common form, about 1% of men; ΔE 28.8 from the original
Tritanopia#008784no blue cones; rare, and affects men and women equally; ΔE 8.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.65:1WCAG large text: AAA
Contrast with black, large text4.51:1WCAG large text: AAA

Named colours

Teal · ΔE 6.3Dark cyan · ΔE 7.7Cadetblue · ΔE 15Light seagreen · ΔE 21.9Slate grey · ΔE 24Light slate grey · ΔE 24.5
Nearest named CSS colourTeal (#008080)ΔE 6.32, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B0B01
Analogous#018B50, #013C8B
Triadic#8B0181, #818B01
Split complementary#8B013C, #8B5001
Tetradic#50018B, #8B0B01, #3C8B01

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5AF2FE
Lighter +30%#28EEFD
Lighter +20%#02DFF0
Lighter +10%#01B0BE
Darker −10%#015258
Darker −20%#002326
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00828C
Less saturated −25%#12727A

Channel breakdown

R1
G129
B139
Red1 (0.4%)
Green129 (50.6%)
Blue139 (54.5%)
Hue184.35°
Saturation (HSL)98.57%
Lightness27.45%
Dominant channelBlue
Hex per channelR 01 · G 81 · B 8B

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Every value on this page was computed from “01818b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.