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Recognised as Colour

#17499E

  • #17499E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#17499E is a blue with RGB values 23, 73, 158 and HSL 218°, 75%, 35%. It is a dark colour, so white text on it reaches 8.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#17499E#17499E
HEX#17499E
RGBrgb(23, 73, 158)
RGB (0–1)0.0902, 0.2863, 0.6196
RGB percentages9%, 28.6%, 62%
HSLhsl(217.8, 74.6%, 35.5%)
HSV / HSBhsv(217.8, 85.4%, 62%)
CMYK85.4%, 53.8%, 0%, 38%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,526,174
CSS custom property--colour: #17499E;

Brightness & contrast

Relative luminance0.07416WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.46:1
Contrast with white8.46:1WCAG normal text: AAA
Contrast with black2.48:1WCAG normal text: Fail
Greyscale equivalent#454545
Inverted#E8B661

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0553A1no red cones; affects about 1% of men; ΔE 7.7 from the original
Deuteranopia#00479Cno green cones; the most common form, about 1% of men; ΔE 1.5 from the original
Tritanopia#005E6Cno blue cones; rare, and affects men and women equally; ΔE 50.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.46:1WCAG large text: AAA
Contrast with black, large text2.48:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12.6Midnight blue · ΔE 22.4Royal blue · ΔE 22.9Slate blue · ΔE 23.9Rebecca purple · ΔE 26.1Medium purple · ΔE 29.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.64, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9E6C17
Analogous#178C9E, #29179E
Triadic#9E1749, #499E17
Split complementary#9E2817, #8D9E17
Tetradic#9E178C, #9E6C17, #179E28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#92B4EF
Lighter +30%#6596E9
Lighter +20%#3978E2
Lighter +10%#1D5ECB
Darker −10%#113471
Darker −20%#0A2045
Darker −30%#040B18
Darker −40%#000000
More saturated +25%#0043B5
Less saturated −25%#2E4F87

Channel breakdown

R23
G73
B158
Red23 (9%)
Green73 (28.6%)
Blue158 (62%)
Hue217.78°
Saturation (HSL)74.59%
Lightness35.49%
Dominant channelBlue
Hex per channelR 17 · G 49 · B 9E

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Every value on this page was computed from “17499e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.