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Recognised as Colour

#17427E

  • #17427E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#17427E is a blue with RGB values 23, 66, 126 and HSL 215°, 69%, 29%. It is a dark colour, so white text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#17427E#17427E
HEX#17427E
RGBrgb(23, 66, 126)
RGB (0–1)0.0902, 0.2588, 0.4941
RGB percentages9%, 25.9%, 49.4%
HSLhsl(215, 69.1%, 29.2%)
HSV / HSBhsv(215, 81.7%, 49.4%)
CMYK81.7%, 47.6%, 0%, 50.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,524,350
CSS custom property--colour: #17427E;

Brightness & contrast

Relative luminance0.05585WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.92:1
Contrast with white9.92:1WCAG normal text: AAA
Contrast with black2.12:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#E8BD81

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#224880no red cones; affects about 1% of men; ΔE 3.9 from the original
Deuteranopia#083E7Dno green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#00505Ano blue cones; rare, and affects men and women equally; ΔE 36.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.92:1WCAG large text: AAA
Contrast with black, large text2.12:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18Steel blue · ΔE 27.9Midnight blue · ΔE 28.6Cornflower blue · ΔE 35.4Rebecca purple · ΔE 35.6Slate blue · ΔE 37.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 17.96, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7E5317
Analogous#17767E, #1F177E
Triadic#7E1742, #427E17
Split complementary#7E1F17, #767E17
Tetradic#7E1776, #7E5317, #177E1F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7AA8E7
Lighter +30%#4F8BDF
Lighter +20%#276FD4
Lighter +10%#1F59A9
Darker −10%#0F2B53
Darker −20%#071528
Darker −30%#000000
Darker −40%#000000
More saturated +25%#043F91
Less saturated −25%#2A456B

Channel breakdown

R23
G66
B126
Red23 (9%)
Green66 (25.9%)
Blue126 (49.4%)
Hue214.95°
Saturation (HSL)69.13%
Lightness29.22%
Dominant channelBlue
Hex per channelR 17 · G 42 · B 7E

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Every value on this page was computed from “17427e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.