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Recognised as Colour

#557ECC

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

#557ECC is a blue with RGB values 85, 126, 204 and HSL 219°, 54%, 57%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#557ECC#557ECC
HEX#557ECC
RGBrgb(85, 126, 204)
RGB (0–1)0.3333, 0.4941, 0.8
RGB percentages33.3%, 49.4%, 80%
HSLhsl(219.3, 53.8%, 56.7%)
HSV / HSBhsv(219.3, 58.3%, 80%)
CMYK58.3%, 38.2%, 0%, 20%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,603,020
CSS custom property--colour: #557ECC;

Brightness & contrast

Relative luminance0.21213WCAG 2.x, 0 is black and 1 is white
Perceived brightness127.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.24:1
Contrast with white4.01:1WCAG normal text: Fail
Contrast with black5.24:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#AA8133

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5D85CFno red cones; affects about 1% of men; ΔE 3.7 from the original
Deuteranopia#4E7ACAno green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#008F9Bno blue cones; rare, and affects men and women equally; ΔE 46.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.01:1WCAG large text: AA
Contrast with black, large text5.24:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 9.9Steel blue · ΔE 18.3Dodgerblue · ΔE 19.7Royal blue · ΔE 27.2Dark slateblue · ΔE 28.1Medium purple · ΔE 28.1
Nearest named CSS colourCornflower blue (#6495ED)ΔE 9.87, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CCA355
Analogous#55B9CC, #6855CC
Triadic#CC557E, #7ECC55
Split complementary#CC6755, #B9CC55
Tetradic#CC55B9, #CCA355, #55CC67

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F2F5FB
Lighter +30%#CBD7EF
Lighter +20%#A3BAE4
Lighter +10%#7C9CD8
Darker −10%#3763B7
Darker −20%#2B4E90
Darker −30%#1F3969
Darker −40%#142341
More saturated +25%#3975E8
Less saturated −25%#7187B0

Channel breakdown

R85
G126
B204
Red85 (33.3%)
Green126 (49.4%)
Blue204 (80%)
Hue219.33°
Saturation (HSL)53.85%
Lightness56.67%
Dominant channelBlue
Hex per channelR 55 · G 7E · B CC

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