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Colour

#557AF8

  • #557AF8
  • Blue
  • Dark
  • Nearest: Royal blue

#557AF8 is a blue with RGB values 85, 122, 248 and HSL 226°, 92%, 65%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#557AF8#557AF8
HEX#557AF8
RGBrgb(85, 122, 248)
RGB (0–1)0.3333, 0.4784, 0.9725
RGB percentages33.3%, 47.8%, 97.3%
HSLhsl(226.4, 92.1%, 65.3%)
HSV / HSBhsv(226.4, 65.7%, 97.3%)
CMYK65.7%, 50.8%, 0%, 2.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,602,040
CSS custom property--colour: #557AF8;

Brightness & contrast

Relative luminance0.22628WCAG 2.x, 0 is black and 1 is white
Perceived brightness133.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.53:1
Contrast with white3.8:1WCAG normal text: Fail
Contrast with black5.53:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#AA8507

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2D8BFCno red cones; affects about 1% of men; ΔE 14.5 from the original
Deuteranopia#007CF5no green cones; the most common form, about 1% of men; ΔE 9.4 from the original
Tritanopia#0098ADno blue cones; rare, and affects men and women equally; ΔE 70.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.8:1WCAG large text: AA
Contrast with black, large text5.53:1WCAG large text: AAA

Named colours

Royal blue · ΔE 7.1Medium slateblue · ΔE 14.8Slate blue · ΔE 16.2Dodgerblue · ΔE 17.7Medium purple · ΔE 19.8Cornflower blue · ΔE 25.8
Nearest named CSS colourRoyal blue (#4169E1)ΔE 7.08, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#F8D355
Analogous#55CBF8, #8255F8
Triadic#F8557A, #7AF855
Split complementary#F88255, #CBF855
Tetradic#F855CB, #F8D355, #55F882

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#E8EDFE
Lighter +20%#B7C7FC
Lighter +10%#86A0FA
Darker −10%#2454F6
Darker −20%#0939DE
Darker −30%#072DAD
Darker −40%#05207C
More saturated +25%#4E76FF
Less saturated −25%#6B86E2

Channel breakdown

R85
G122
B248
Red85 (33.3%)
Green122 (47.8%)
Blue248 (97.3%)
Hue226.38°
Saturation (HSL)92.09%
Lightness65.29%
Dominant channelBlue
Hex per channelR 55 · G 7A · B F8

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Every value on this page was computed from “557af8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.