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Colour

#0556A4

  • #0556A4
  • Blue
  • Dark
  • Nearest: Dark slateblue

#0556A4 is a blue with RGB values 5, 86, 164 and HSL 209°, 94%, 33%. It is a dark colour, so white text on it reaches 7.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#0556A4#0556A4
HEX#0556A4
RGBrgb(5, 86, 164)
RGB (0–1)0.0196, 0.3373, 0.6431
RGB percentages2%, 33.7%, 64.3%
HSLhsl(209.4, 94.1%, 33.1%)
HSV / HSBhsv(209.4, 97%, 64.3%)
CMYK97%, 47.6%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer349,860
CSS custom property--colour: #0556A4;

Brightness & contrast

Relative luminance0.09368WCAG 2.x, 0 is black and 1 is white
Perceived brightness86.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.31:1
Contrast with white7.31:1WCAG normal text: AAA
Contrast with black2.87:1WCAG normal text: Fail
Greyscale equivalent#4A4A4A
Inverted#FAA95B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#295DA7no red cones; affects about 1% of men; ΔE 4.4 from the original
Deuteranopia#0050A2no green cones; the most common form, about 1% of men; ΔE 4.1 from the original
Tritanopia#006975no blue cones; rare, and affects men and women equally; ΔE 45.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.31:1WCAG large text: AAA
Contrast with black, large text2.87:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18.4Cornflower blue · ΔE 25.3Steel blue · ΔE 26.2Royal blue · ΔE 26.4Dodgerblue · ΔE 27.4Slate blue · ΔE 29.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.37, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A45305
Analogous#05A4A3, #0506A4
Triadic#A40556, #56A405
Split complementary#A40506, #A4A305
Tetradic#A305A4, #A45305, #06A405

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7ABCFB
Lighter +30%#49A3F9
Lighter +20%#178AF8
Lighter +10%#0770D5
Darker −10%#033C73
Darker −20%#022241
Darker −30%#000810
Darker −40%#000000
More saturated +25%#0056A9
Less saturated −25%#1A568F

Channel breakdown

R5
G86
B164
Red5 (2%)
Green86 (33.7%)
Blue164 (64.3%)
Hue209.43°
Saturation (HSL)94.08%
Lightness33.14%
Dominant channelBlue
Hex per channelR 05 · G 56 · B A4

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Every value on this page was computed from “0556a4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.