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Recognised as Colour

#558BB7

  • #558BB7
  • Blue
  • Dark
  • Nearest: Steel blue

#558BB7 is a blue with RGB values 85, 139, 183 and HSL 207°, 40%, 53%. 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

#558BB7#558BB7
HEX#558BB7
RGBrgb(85, 139, 183)
RGB (0–1)0.3333, 0.5451, 0.7176
RGB percentages33.3%, 54.5%, 71.8%
HSLhsl(206.9, 40.5%, 52.5%)
HSV / HSBhsv(206.9, 53.6%, 71.8%)
CMYK53.6%, 24%, 0%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,606,327
CSS custom property--colour: #558BB7;

Brightness & contrast

Relative luminance0.23815WCAG 2.x, 0 is black and 1 is white
Perceived brightness131.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.76:1
Contrast with white3.64:1WCAG normal text: Fail
Contrast with black5.76:1WCAG normal text: AA
Greyscale equivalent#838383
Inverted#AA7448

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#788CB9no red cones; affects about 1% of men; ΔE 9.8 from the original
Deuteranopia#6B82B6no green cones; the most common form, about 1% of men; ΔE 10.6 from the original
Tritanopia#19969Ano blue cones; rare, and affects men and women equally; ΔE 30 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.64:1WCAG large text: AA
Contrast with black, large text5.76:1WCAG large text: AAA

Named colours

Steel blue · ΔE 5.1Light slate grey · ΔE 17.6Slate grey · ΔE 18.5Light skyblue · ΔE 24.5Deep skyblue · ΔE 25.1Cornflower blue · ΔE 26
Nearest named CSS colourSteel blue (#4682B4)ΔE 5.15, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B78155
Analogous#55B7B2, #555AB7
Triadic#B7558B, #8BB755
Split complementary#B7555A, #B7B255
Tetradic#B255B7, #B78155, #5AB755

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E4EDF4
Lighter +30%#C0D4E5
Lighter +20%#9DBCD5
Lighter +10%#79A3C6
Darker −10%#417198
Darker −20%#315675
Darker −30%#223C51
Darker −40%#13212D
More saturated +25%#378ED5
Less saturated −25%#738899

Channel breakdown

R85
G139
B183
Red85 (33.3%)
Green139 (54.5%)
Blue183 (71.8%)
Hue206.94°
Saturation (HSL)40.5%
Lightness52.55%
Dominant channelBlue
Hex per channelR 55 · G 8B · B B7

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Every value on this page was computed from “558bb7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.