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Colour

#09378B

  • #09378B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#09378B is a blue with RGB values 9, 55, 139 and HSL 219°, 88%, 29%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#09378B#09378B
HEX#09378B
RGBrgb(9, 55, 139)
RGB (0–1)0.0353, 0.2157, 0.5451
RGB percentages3.5%, 21.6%, 54.5%
HSLhsl(218.8, 87.8%, 29%)
HSV / HSBhsv(218.8, 93.5%, 54.5%)
CMYK93.5%, 60.4%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer604,043
CSS custom property--colour: #09378B;

Brightness & contrast

Relative luminance0.04655WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.88:1
Contrast with white10.88:1WCAG normal text: AAA
Contrast with black1.93:1WCAG normal text: Fail
Greyscale equivalent#333333
Inverted#F6C874

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00438Eno red cones; affects about 1% of men; ΔE 9.4 from the original
Deuteranopia#003789no green cones; the most common form, about 1% of men; ΔE 1.5 from the original
Tritanopia#004D5Bno blue cones; rare, and affects men and women equally; ΔE 51.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.88:1WCAG large text: AAA
Contrast with black, large text1.93:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.2Midnight blue · ΔE 14.8Rebecca purple · ΔE 23.5Slate blue · ΔE 25.9Royal blue · ΔE 27.1Indigo · ΔE 31.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.2, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B5D09
Analogous#09788B, #1C098B
Triadic#8B0937, #378B09
Split complementary#8B1C09, #788B09
Tetradic#8B0978, #8B5D09, #098B1C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6B9CF5
Lighter +30%#3B7CF2
Lighter +20%#0F5DEB
Lighter +10%#0C4ABB
Darker −10%#06245B
Darker −20%#03112B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003494
Less saturated −25%#1B3C79

Channel breakdown

R9
G55
B139
Red9 (3.5%)
Green55 (21.6%)
Blue139 (54.5%)
Hue218.77°
Saturation (HSL)87.84%
Lightness29.02%
Dominant channelBlue
Hex per channelR 09 · G 37 · B 8B

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Every value on this page was computed from “09378b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.