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Recognised as Colour

#1023BB

  • #1023BB
  • Blue
  • Dark
  • Nearest: Dark blue

#1023BB is a blue with RGB values 16, 35, 187 and HSL 233°, 84%, 40%. It is a dark colour, so white text on it reaches 10.6:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#1023BB#1023BB
HEX#1023BB
RGBrgb(16, 35, 187)
RGB (0–1)0.0627, 0.1373, 0.7333
RGB percentages6.3%, 13.7%, 73.3%
HSLhsl(233.3, 84.2%, 39.8%)
HSV / HSBhsv(233.3, 91.4%, 73.3%)
CMYK91.4%, 81.3%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,057,723
CSS custom property--colour: #1023BB;

Brightness & contrast

Relative luminance0.049WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.61:1
Contrast with white10.61:1WCAG normal text: AAA
Contrast with black1.98:1WCAG normal text: Fail
Greyscale equivalent#2A2A2A
Inverted#EFDC44

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0047BFno red cones; affects about 1% of men; ΔE 24.9 from the original
Deuteranopia#0036B8no green cones; the most common form, about 1% of men; ΔE 14.6 from the original
Tritanopia#005470no blue cones; rare, and affects men and women equally; ΔE 84.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.61:1WCAG large text: AAA
Contrast with black, large text1.98:1WCAG large text: Fail

Named colours

Dark blue · ΔE 15.3Navy · ΔE 19.6Medium blue · ΔE 20.6Blue violet · ΔE 24.6Indigo · ΔE 25.8Dark orchid · ΔE 28.5
Nearest named CSS colourDark blue (#00008B)ΔE 15.25, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BBA810
Analogous#1078BB, #5310BB
Triadic#BB1023, #23BB10
Split complementary#BB5310, #78BB10
Tetradic#BB1078, #BBA810, #10BB53

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A0AAF7
Lighter +30%#7180F3
Lighter +20%#4255EF
Lighter +10%#142CEA
Darker −10%#0C1A8C
Darker −20%#08115D
Darker −30%#04092E
Darker −40%#000000
More saturated +25%#0017CB
Less saturated −25%#2937A2

Channel breakdown

R16
G35
B187
Red16 (6.3%)
Green35 (13.7%)
Blue187 (73.3%)
Hue233.33°
Saturation (HSL)84.24%
Lightness39.8%
Dominant channelBlue
Hex per channelR 10 · G 23 · B BB

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Every value on this page was computed from “1023bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.