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Colour

#557DC5

  • #557DC5
  • Blue
  • Dark
  • Nearest: Cornflower blue

#557DC5 is a blue with RGB values 85, 125, 197 and HSL 219°, 49%, 55%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#557DC5#557DC5
HEX#557DC5
RGBrgb(85, 125, 197)
RGB (0–1)0.3333, 0.4902, 0.7725
RGB percentages33.3%, 49%, 77.3%
HSLhsl(218.6, 49.1%, 55.3%)
HSV / HSBhsv(218.6, 56.9%, 77.3%)
CMYK56.9%, 36.5%, 0%, 22.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,602,757
CSS custom property--colour: #557DC5;

Brightness & contrast

Relative luminance0.2063WCAG 2.x, 0 is black and 1 is white
Perceived brightness125.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.13:1
Contrast with white4.1:1WCAG normal text: Fail
Contrast with black5.13:1WCAG normal text: AA
Greyscale equivalent#7A7A7A
Inverted#AA823A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5F83C8no red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#5179C3no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#008D98no blue cones; rare, and affects men and women equally; ΔE 44.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.1:1WCAG large text: AA
Contrast with black, large text5.13:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 12.2Steel blue · ΔE 15.1Dodgerblue · ΔE 22.8Dark slateblue · ΔE 28.5Royal blue · ΔE 30.4Medium purple · ΔE 30.5
Nearest named CSS colourCornflower blue (#6495ED)ΔE 12.16, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C59D55
Analogous#55B5C5, #6555C5
Triadic#C5557D, #7DC555
Split complementary#C56555, #B5C555
Tetradic#C555B5, #C59D55, #55C565

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDF1F9
Lighter +30%#C7D4EC
Lighter +20%#A1B7DF
Lighter +10%#7B9AD2
Darker −10%#3B63AC
Darker −20%#2E4D86
Darker −30%#213760
Darker −40%#14223A
More saturated +25%#3975E2
Less saturated −25%#7285A9

Channel breakdown

R85
G125
B197
Red85 (33.3%)
Green125 (49%)
Blue197 (77.3%)
Hue218.57°
Saturation (HSL)49.12%
Lightness55.29%
Dominant channelBlue
Hex per channelR 55 · G 7D · B C5

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Every value on this page was computed from “557dc5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.