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Recognised as Colour

#1D23C0

  • #1D23C0
  • Blue
  • Dark
  • Nearest: Dark blue

#1D23C0 is a blue with RGB values 29, 35, 192 and HSL 238°, 74%, 43%. It is a dark colour, so white text on it reaches 10.2:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#1D23C0#1D23C0
HEX#1D23C0
RGBrgb(29, 35, 192)
RGB (0–1)0.1137, 0.1373, 0.7529
RGB percentages11.4%, 13.7%, 75.3%
HSLhsl(237.8, 73.8%, 43.3%)
HSV / HSBhsv(237.8, 84.9%, 75.3%)
CMYK84.9%, 81.8%, 0%, 24.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,909,696
CSS custom property--colour: #1D23C0;

Brightness & contrast

Relative luminance0.05269WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.22:1
Contrast with white10.22:1WCAG normal text: AAA
Contrast with black2.05:1WCAG normal text: Fail
Greyscale equivalent#2D2D2D
Inverted#E2DC3F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0049C4no red cones; affects about 1% of men; ΔE 25.9 from the original
Deuteranopia#0038BDno green cones; the most common form, about 1% of men; ΔE 15.8 from the original
Tritanopia#005673no blue cones; rare, and affects men and women equally; ΔE 86 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.22:1WCAG large text: AAA
Contrast with black, large text2.05:1WCAG large text: Fail

Named colours

Dark blue · ΔE 17.1Medium blue · ΔE 18.4Navy · ΔE 21.6Blue violet · ΔE 22.6Indigo · ΔE 27.3Dark violet · ΔE 27.5
Nearest named CSS colourDark blue (#00008B)ΔE 17.06, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C0BA1D
Analogous#1D74C0, #691DC0
Triadic#C01D23, #23C01D
Split complementary#C0691D, #75C01D
Tetradic#C01D74, #C0BA1D, #1DC069

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B5B7F4
Lighter +30%#898DED
Lighter +20%#5D62E6
Lighter +10%#3037E0
Darker −10%#161B94
Darker −20%#101367
Darker −30%#090B3B
Darker −40%#02030F
More saturated +25%#0109DC
Less saturated −25%#393DA4

Channel breakdown

R29
G35
B192
Red29 (11.4%)
Green35 (13.7%)
Blue192 (75.3%)
Hue237.79°
Saturation (HSL)73.76%
Lightness43.33%
Dominant channelBlue
Hex per channelR 1D · G 23 · B C0

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Every value on this page was computed from “1d23c0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.