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Recognised as Colour

#23399A

  • #23399A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#23399A is a blue with RGB values 35, 57, 154 and HSL 229°, 63%, 37%. 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

#23399A#23399A
HEX#23399A
RGBrgb(35, 57, 154)
RGB (0–1)0.1373, 0.2235, 0.6039
RGB percentages13.7%, 22.4%, 60.4%
HSLhsl(228.9, 63%, 37.1%)
HSV / HSBhsv(228.9, 77.3%, 60.4%)
CMYK77.3%, 63%, 0%, 39.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,308,506
CSS custom property--colour: #23399A;

Brightness & contrast

Relative luminance0.05617WCAG 2.x, 0 is black and 1 is white
Perceived brightness70.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.89:1
Contrast with white9.89:1WCAG normal text: AAA
Contrast with black2.12:1WCAG normal text: Fail
Greyscale equivalent#3B3B3B
Inverted#DCC665

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00499Dno red cones; affects about 1% of men; ΔE 13.5 from the original
Deuteranopia#003E98no green cones; the most common form, about 1% of men; ΔE 6.9 from the original
Tritanopia#005264no blue cones; rare, and affects men and women equally; ΔE 57.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.89:1WCAG large text: AAA
Contrast with black, large text2.12:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.5Midnight blue · ΔE 14.4Rebecca purple · ΔE 18Slate blue · ΔE 19.1Royal blue · ΔE 21.9Indigo · ΔE 25.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.52, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9A8423
Analogous#23759A, #48239A
Triadic#9A2339, #399A23
Split complementary#9A4823, #759A23
Tetradic#9A2375, #9A8423, #239A48

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A0ADE9
Lighter +30%#768AE0
Lighter +20%#4D66D6
Lighter +10%#2C48C4
Darker −10%#1A2A70
Darker −20%#101A47
Darker −30%#070B1D
Darker −40%#000000
More saturated +25%#0B2AB2
Less saturated −25%#3B4882

Channel breakdown

R35
G57
B154
Red35 (13.7%)
Green57 (22.4%)
Blue154 (60.4%)
Hue228.91°
Saturation (HSL)62.96%
Lightness37.06%
Dominant channelBlue
Hex per channelR 23 · G 39 · B 9A

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Every value on this page was computed from “23399a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.