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Colour

#018B51

  • #018B51
  • Cyan
  • Dark
  • Nearest: Sea green

#018B51 is a cyan with RGB values 1, 139, 81 and HSL 155°, 99%, 27%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#018B51#018B51
HEX#018B51
RGBrgb(1, 139, 81)
RGB (0–1)0.0039, 0.5451, 0.3176
RGB percentages0.4%, 54.5%, 31.8%
HSLhsl(154.8, 98.6%, 27.5%)
HSV / HSBhsv(154.8, 99.3%, 54.5%)
CMYK99.3%, 0%, 41.7%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer101,201
CSS custom property--colour: #018B51;

Brightness & contrast

Relative luminance0.19066WCAG 2.x, 0 is black and 1 is white
Perceived brightness110 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.81:1
Contrast with white4.36:1WCAG normal text: Fail
Contrast with black4.81:1WCAG normal text: AA
Greyscale equivalent#696969
Inverted#FE74AE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8A7F4Dno red cones; affects about 1% of men; ΔE 43.4 from the original
Deuteranopia#7D7555no green cones; the most common form, about 1% of men; ΔE 44 from the original
Tritanopia#008A7Dno blue cones; rare, and affects men and women equally; ΔE 26.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.36:1WCAG large text: AA
Contrast with black, large text4.81:1WCAG large text: AAA

Named colours

Sea green · ΔE 6.8Medium seagreen · ΔE 14.8Forest green · ΔE 23Dark green · ΔE 24.6Green · ΔE 28.6Medium aquamarine · ΔE 29.6
Nearest named CSS colourSea green (#2E8B57)ΔE 6.82, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B013B
Analogous#018B0C, #01808B
Triadic#51018B, #8B5101
Split complementary#8B0180, #8B0C01
Tetradic#0C018B, #8B013B, #808B01

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5AFEB9
Lighter +30%#28FDA4
Lighter +20%#02F08C
Lighter +10%#01BE6F
Darker −10%#015833
Darker −20%#002616
Darker −30%#000000
Darker −40%#000000
More saturated +25%#008C51
Less saturated −25%#127A4E

Channel breakdown

R1
G139
B81
Red1 (0.4%)
Green139 (54.5%)
Blue81 (31.8%)
Hue154.78°
Saturation (HSL)98.57%
Lightness27.45%
Dominant channelGreen
Hex per channelR 01 · G 8B · B 51

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Every value on this page was computed from “018b51” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.