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Recognised as Colour

#557FCA

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

#557FCA is a blue with RGB values 85, 127, 202 and HSL 218°, 52%, 56%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#557FCA#557FCA
HEX#557FCA
RGBrgb(85, 127, 202)
RGB (0–1)0.3333, 0.498, 0.7922
RGB percentages33.3%, 49.8%, 79.2%
HSLhsl(218.5, 52.5%, 56.3%)
HSV / HSBhsv(218.5, 57.9%, 79.2%)
CMYK57.9%, 37.1%, 0%, 20.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,603,274
CSS custom property--colour: #557FCA;

Brightness & contrast

Relative luminance0.21374WCAG 2.x, 0 is black and 1 is white
Perceived brightness127.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.27:1
Contrast with white3.98:1WCAG normal text: Fail
Contrast with black5.27:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#AA8035

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6085CDno red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#517AC8no green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#00909Bno blue cones; rare, and affects men and women equally; ΔE 45.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.98:1WCAG large text: AA
Contrast with black, large text5.27:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 10.5Steel blue · ΔE 16.5Dodgerblue · ΔE 21Dark slateblue · ΔE 28.9Royal blue · ΔE 29.1Medium purple · ΔE 29.6
Nearest named CSS colourCornflower blue (#6495ED)ΔE 10.53, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CAA055
Analogous#55BACA, #6555CA
Triadic#CA557F, #7FCA55
Split complementary#CA6655, #BACA55
Tetradic#CA55BA, #CAA055, #55CA66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F1F4FA
Lighter +30%#CAD7EE
Lighter +20%#A3BAE2
Lighter +10%#7C9CD6
Darker −10%#3865B4
Darker −20%#2C4F8D
Darker −30%#203966
Darker −40%#14233F
More saturated +25%#3977E6
Less saturated −25%#7187AE

Channel breakdown

R85
G127
B202
Red85 (33.3%)
Green127 (49.8%)
Blue202 (79.2%)
Hue218.46°
Saturation (HSL)52.47%
Lightness56.27%
Dominant channelBlue
Hex per channelR 55 · G 7F · B CA

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