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Colour

#557AFF

  • #557AFF
  • Blue
  • Dark
  • Nearest: Royal blue

#557AFF is a blue with RGB values 85, 122, 255 and HSL 227°, 100%, 67%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#557AFF#557AFF
HEX#557AFF
RGBrgb(85, 122, 255)
RGB (0–1)0.3333, 0.4784, 1
RGB percentages33.3%, 47.8%, 100%
HSLhsl(226.9, 100%, 66.7%)
HSV / HSBhsv(226.9, 66.7%, 100%)
CMYK66.7%, 52.2%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,602,047
CSS custom property--colour: #557AFF;

Brightness & contrast

Relative luminance0.2307WCAG 2.x, 0 is black and 1 is white
Perceived brightness135.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.61:1
Contrast with white3.74:1WCAG normal text: Fail
Contrast with black5.61:1WCAG normal text: AA
Greyscale equivalent#7C7C7C
Inverted#AA8500

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1F8CFFno red cones; affects about 1% of men; ΔE 17.6 from the original
Deuteranopia#007DFCno green cones; the most common form, about 1% of men; ΔE 9.6 from the original
Tritanopia#009AB1no blue cones; rare, and affects men and women equally; ΔE 73 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.74:1WCAG large text: AA
Contrast with black, large text5.61:1WCAG large text: AAA

Named colours

Royal blue · ΔE 9.2Medium slateblue · ΔE 13.3Slate blue · ΔE 17.3Dodgerblue · ΔE 20.6Medium purple · ΔE 21.5Cornflower blue · ΔE 29.4
Nearest named CSS colourRoyal blue (#4169E1)ΔE 9.2, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFDA55
Analogous#55CFFF, #8555FF
Triadic#FF557A, #7AFF55
Split complementary#FF8555, #CFFF55
Tetradic#FF55CF, #FFDA55, #55FF85

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EEF2FF
Lighter +20%#BBCAFF
Lighter +10%#88A2FF
Darker −10%#2252FF
Darker −20%#0034EE
Darker −30%#0029BB
Darker −40%#001E88
More saturated +25%#557AFF
Less saturated −25%#6A86EA

Channel breakdown

R85
G122
B255
Red85 (33.3%)
Green122 (47.8%)
Blue255 (100%)
Hue226.94°
Saturation (HSL)100%
Lightness66.67%
Dominant channelBlue
Hex per channelR 55 · G 7A · B FF

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Every value on this page was computed from “557aff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.