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Recognised as Colour

#138DFF

  • #138DFF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#138DFF is a blue with RGB values 19, 141, 255 and HSL 209°, 100%, 54%. It is a dark colour, so black text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#138DFF#138DFF
HEX#138DFF
RGBrgb(19, 141, 255)
RGB (0–1)0.0745, 0.5529, 1
RGB percentages7.5%, 55.3%, 100%
HSLhsl(209, 100%, 53.7%)
HSV / HSBhsv(209, 92.5%, 100%)
CMYK92.5%, 44.7%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,281,535
CSS custom property--colour: #138DFF;

Brightness & contrast

Relative luminance0.26408WCAG 2.x, 0 is black and 1 is white
Perceived brightness138.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.28:1
Contrast with white3.34:1WCAG normal text: Fail
Contrast with black6.28:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#EC7200

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4E97FFno red cones; affects about 1% of men; ΔE 7.8 from the original
Deuteranopia#0C83FDno green cones; the most common form, about 1% of men; ΔE 7 from the original
Tritanopia#00A9BAno blue cones; rare, and affects men and women equally; ΔE 61.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.34:1WCAG large text: AA
Contrast with black, large text6.28:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 2.2Cornflower blue · ΔE 16.1Royal blue · ΔE 18.4Slate blue · ΔE 28.9Medium purple · ΔE 29.7Medium slateblue · ΔE 30.5
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 2.25, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF8513
Analogous#13FFFB, #1317FF
Triadic#FF138D, #8DFF13
Split complementary#FF1317, #FFFB13
Tetradic#FB13FF, #FF8513, #17FF13

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DFF0FF
Lighter +30%#ACD7FF
Lighter +20%#79BEFF
Lighter +10%#46A6FF
Darker −10%#0073DF
Darker −20%#0059AC
Darker −30%#003F79
Darker −40%#002446
More saturated +25%#138DFF
Less saturated −25%#318CE2

Channel breakdown

R19
G141
B255
Red19 (7.5%)
Green141 (55.3%)
Blue255 (100%)
Hue208.98°
Saturation (HSL)100%
Lightness53.73%
Dominant channelBlue
Hex per channelR 13 · G 8D · B FF

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Every value on this page was computed from “138dff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.