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Recognised as Colour

#1C23BA

  • #1C23BA
  • Blue
  • Dark
  • Nearest: Dark blue

#1C23BA is a blue with RGB values 28, 35, 186 and HSL 237°, 74%, 42%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#1C23BA#1C23BA
HEX#1C23BA
RGBrgb(28, 35, 186)
RGB (0–1)0.1098, 0.1373, 0.7294
RGB percentages11%, 13.7%, 72.9%
HSLhsl(237.3, 73.8%, 42%)
HSV / HSBhsv(237.3, 84.9%, 72.9%)
CMYK84.9%, 81.2%, 0%, 27.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,844,154
CSS custom property--colour: #1C23BA;

Brightness & contrast

Relative luminance0.04994WCAG 2.x, 0 is black and 1 is white
Perceived brightness70 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.51:1
Contrast with white10.51:1WCAG normal text: AAA
Contrast with black2:1WCAG normal text: Fail
Greyscale equivalent#2C2C2C
Inverted#E3DC45

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0047BEno red cones; affects about 1% of men; ΔE 24.9 from the original
Deuteranopia#0037B7no green cones; the most common form, about 1% of men; ΔE 15.4 from the original
Tritanopia#005370no blue cones; rare, and affects men and women equally; ΔE 82.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.51:1WCAG large text: AAA
Contrast with black, large text2:1WCAG large text: Fail

Named colours

Dark blue · ΔE 14.8Navy · ΔE 19.1Medium blue · ΔE 21.2Blue violet · ΔE 24.2Indigo · ΔE 24.9Dark orchid · ΔE 27.6
Nearest named CSS colourDark blue (#00008B)ΔE 14.83, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BAB31C
Analogous#1C72BA, #641CBA
Triadic#BA1C23, #23BA1C
Split complementary#BA641C, #72BA1C
Tetradic#BA1C72, #BAB31C, #1CBA64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AFB2F3
Lighter +30%#8387EC
Lighter +20%#565DE6
Lighter +10%#2A32DF
Darker −10%#151B8E
Darker −20%#0F1261
Darker −30%#080A35
Darker −40%#010209
More saturated +25%#010BD5
Less saturated −25%#373B9F

Channel breakdown

R28
G35
B186
Red28 (11%)
Green35 (13.7%)
Blue186 (72.9%)
Hue237.34°
Saturation (HSL)73.83%
Lightness41.96%
Dominant channelBlue
Hex per channelR 1C · G 23 · B BA

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Every value on this page was computed from “1c23ba” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.