Nerdulator> put something in

Colour

#173C81

  • #173C81
  • Blue
  • Dark
  • Nearest: Dark slateblue

#173C81 is a blue with RGB values 23, 60, 129 and HSL 219°, 70%, 30%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#173C81#173C81
HEX#173C81
RGBrgb(23, 60, 129)
RGB (0–1)0.0902, 0.2353, 0.5059
RGB percentages9%, 23.5%, 50.6%
HSLhsl(219.1, 69.7%, 29.8%)
HSV / HSBhsv(219.1, 82.2%, 50.6%)
CMYK82.2%, 53.5%, 0%, 49.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,522,817
CSS custom property--colour: #173C81;

Brightness & contrast

Relative luminance0.04999WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.5:1
Contrast with white10.5:1WCAG normal text: AAA
Contrast with black2:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#E8C37E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0D4483no red cones; affects about 1% of men; ΔE 6.6 from the original
Deuteranopia#003B80no green cones; the most common form, about 1% of men; ΔE 1.9 from the original
Tritanopia#004D58no blue cones; rare, and affects men and women equally; ΔE 42.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.5:1WCAG large text: AAA
Contrast with black, large text2:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12.6Midnight blue · ΔE 21.8Rebecca purple · ΔE 29.7Slate blue · ΔE 32.5Steel blue · ΔE 33.2Royal blue · ΔE 33.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.62, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#815C17
Analogous#177181, #271781
Triadic#81173C, #3C8117
Split complementary#812717, #718117
Tetradic#811771, #815C17, #178127

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7CA2E8
Lighter +30%#5183E0
Lighter +20%#2664D8
Lighter +10%#1F50AC
Darker −10%#0F2856
Darker −20%#08142A
Darker −30%#000000
Darker −40%#000000
More saturated +25%#043694
Less saturated −25%#2A426E

Channel breakdown

R23
G60
B129
Red23 (9%)
Green60 (23.5%)
Blue129 (50.6%)
Hue219.06°
Saturation (HSL)69.74%
Lightness29.8%
Dominant channelBlue
Hex per channelR 17 · G 3C · B 81

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “173c81” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.