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Colour

#17255D

  • #17255D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#17255D is a blue with RGB values 23, 37, 93 and HSL 228°, 60%, 23%. It is a dark colour, so white text on it reaches 14.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#17255D#17255D
HEX#17255D
RGBrgb(23, 37, 93)
RGB (0–1)0.0902, 0.1451, 0.3647
RGB percentages9%, 14.5%, 36.5%
HSLhsl(228, 60.3%, 22.7%)
HSV / HSBhsv(228, 75.3%, 36.5%)
CMYK75.3%, 60.2%, 0%, 63.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,516,893
CSS custom property--colour: #17255D;

Brightness & contrast

Relative luminance0.02296WCAG 2.x, 0 is black and 1 is white
Perceived brightness44.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.39:1
Contrast with white14.39:1WCAG normal text: AAA
Contrast with black1.46:1WCAG normal text: Fail
Greyscale equivalent#262626
Inverted#E8DAA2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002D5Fno red cones; affects about 1% of men; ΔE 8.1 from the original
Deuteranopia#00275Cno green cones; the most common form, about 1% of men; ΔE 4.6 from the original
Tritanopia#00333Dno blue cones; rare, and affects men and women equally; ΔE 36.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.39:1WCAG large text: AAA
Contrast with black, large text1.46:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18.6Midnight blue · ΔE 21.5Rebecca purple · ΔE 33.6Indigo · ΔE 40.4Steel blue · ΔE 40.8Slate blue · ΔE 41.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.57, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5D4F17
Analogous#17485D, #2C175D
Triadic#5D1725, #255D17
Split complementary#5D2C17, #485D17
Tetradic#5D1748, #5D4F17, #175D2C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#677ED9
Lighter +30%#3E5BCF
Lighter +20%#2B46AF
Lighter +10%#213586
Darker −10%#0D1534
Darker −20%#03040B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#091C6B
Less saturated −25%#262E4F

Channel breakdown

R23
G37
B93
Red23 (9%)
Green37 (14.5%)
Blue93 (36.5%)
Hue228°
Saturation (HSL)60.34%
Lightness22.75%
Dominant channelBlue
Hex per channelR 17 · G 25 · B 5D

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Every value on this page was computed from “17255d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.