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Recognised as Colour

#538DB3

  • #538DB3
  • Blue
  • Dark
  • Nearest: Steel blue

#538DB3 is a blue with RGB values 83, 141, 179 and HSL 204°, 39%, 51%. 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

#538DB3#538DB3
HEX#538DB3
RGBrgb(83, 141, 179)
RGB (0–1)0.3255, 0.5529, 0.702
RGB percentages32.5%, 55.3%, 70.2%
HSLhsl(203.7, 38.7%, 51.4%)
HSV / HSBhsv(203.7, 53.6%, 70.2%)
CMYK53.6%, 21.2%, 0%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,475,763
CSS custom property--colour: #538DB3;

Brightness & contrast

Relative luminance0.24143WCAG 2.x, 0 is black and 1 is white
Perceived brightness131.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.83:1
Contrast with white3.6:1WCAG normal text: Fail
Contrast with black5.83:1WCAG normal text: AA
Greyscale equivalent#838383
Inverted#AC724C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7C8CB5no red cones; affects about 1% of men; ΔE 12.4 from the original
Deuteranopia#6F82B2no green cones; the most common form, about 1% of men; ΔE 13.5 from the original
Tritanopia#15979Ano blue cones; rare, and affects men and women equally; ΔE 27 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.6:1WCAG large text: AA
Contrast with black, large text5.83:1WCAG large text: AAA

Named colours

Steel blue · ΔE 8.4Light slate grey · ΔE 15.7Slate grey · ΔE 16.6Cadetblue · ΔE 22.3Light skyblue · ΔE 23.8Sky blue · ΔE 24.4
Nearest named CSS colourSteel blue (#4682B4)ΔE 8.43, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B37953
Analogous#53B3A9, #535DB3
Triadic#B3538D, #8DB353
Split complementary#B3535D, #B3A953
Tetradic#A953B3, #B37953, #5DB353

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E0EBF2
Lighter +30%#BDD3E2
Lighter +20%#9ABCD2
Lighter +10%#76A4C3
Darker −10%#417292
Darker −20%#31566F
Darker −30%#213B4C
Darker −40%#121F28
More saturated +25%#3493D2
Less saturated −25%#728794

Channel breakdown

R83
G141
B179
Red83 (32.5%)
Green141 (55.3%)
Blue179 (70.2%)
Hue203.75°
Saturation (HSL)38.71%
Lightness51.37%
Dominant channelBlue
Hex per channelR 53 · G 8D · B B3

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Every value on this page was computed from “538db3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.