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Recognised as Colour

#158DD4

  • #158DD4
  • Blue
  • Dark
  • Nearest: Steel blue

#158DD4 is a blue with RGB values 21, 141, 212 and HSL 202°, 82%, 46%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#158DD4#158DD4
HEX#158DD4
RGBrgb(21, 141, 212)
RGB (0–1)0.0824, 0.5529, 0.8314
RGB percentages8.2%, 55.3%, 83.1%
HSLhsl(202.3, 82%, 45.7%)
HSV / HSBhsv(202.3, 90.1%, 83.1%)
CMYK90.1%, 33.5%, 0%, 16.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,412,564
CSS custom property--colour: #158DD4;

Brightness & contrast

Relative luminance0.23963WCAG 2.x, 0 is black and 1 is white
Perceived brightness130.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.79:1
Contrast with white3.63:1WCAG normal text: Fail
Contrast with black5.79:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#EA722B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6B8FD7no red cones; affects about 1% of men; ΔE 13.5 from the original
Deuteranopia#517FD3no green cones; the most common form, about 1% of men; ΔE 15.7 from the original
Tritanopia#009FA7no blue cones; rare, and affects men and women equally; ΔE 40.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.63:1WCAG large text: AA
Contrast with black, large text5.79:1WCAG large text: AAA

Named colours

Steel blue · ΔE 13.2Cornflower blue · ΔE 16Deep skyblue · ΔE 21Dodgerblue · ΔE 24Light skyblue · ΔE 29.4Light slate grey · ΔE 33.8
Nearest named CSS colourSteel blue (#4682B4)ΔE 13.16, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D45C15
Analogous#15D4BB, #152ED4
Triadic#D4158D, #8DD415
Split complementary#D4152E, #D4BB15
Tetradic#BB15D4, #D45C15, #2ED415

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BDE2F8
Lighter +30%#8ECEF4
Lighter +20%#60BAEF
Lighter +10%#31A6EB
Darker −10%#106EA6
Darker −20%#0C4F77
Darker −30%#073049
Darker −40%#03121A
More saturated +25%#0092E9
Less saturated −25%#3286B7

Channel breakdown

R21
G141
B212
Red21 (8.2%)
Green141 (55.3%)
Blue212 (83.1%)
Hue202.3°
Saturation (HSL)81.97%
Lightness45.69%
Dominant channelBlue
Hex per channelR 15 · G 8D · B D4

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Every value on this page was computed from “158dd4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.