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Recognised as Colour

#1C00A9

  • #1C00A9
  • Blue
  • Dark
  • Nearest: Dark blue

#1C00A9 is a blue with RGB values 28, 0, 169 and HSL 250°, 100%, 33%. It is a dark colour, so white text on it reaches 12.9:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#1C00A9#1C00A9
HEX#1C00A9
RGBrgb(28, 0, 169)
RGB (0–1)0.1098, 0, 0.6627
RGB percentages11%, 0%, 66.3%
HSLhsl(249.9, 100%, 33.1%)
HSV / HSBhsv(249.9, 100%, 66.3%)
CMYK83.4%, 100%, 0%, 33.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,835,177
CSS custom property--colour: #1C00A9;

Brightness & contrast

Relative luminance0.03111WCAG 2.x, 0 is black and 1 is white
Perceived brightness59.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.94:1
Contrast with white12.94:1WCAG normal text: AAA
Contrast with black1.62:1WCAG normal text: Fail
Greyscale equivalent#121212
Inverted#E3FF56

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0039ADno red cones; affects about 1% of men; ΔE 29.8 from the original
Deuteranopia#0029A7no green cones; the most common form, about 1% of men; ΔE 20.2 from the original
Tritanopia#004461no 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 text12.94:1WCAG large text: AAA
Contrast with black, large text1.62:1WCAG large text: Fail

Named colours

Dark blue · ΔE 13.3Medium blue · ΔE 17Navy · ΔE 18.5Blue violet · ΔE 24.6Indigo · ΔE 25.2Dark violet · ΔE 27.1
Nearest named CSS colourDark blue (#00008B)ΔE 13.32, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8DA900
Analogous#0039A9, #7000A9
Triadic#A91C00, #00A91C
Split complementary#A97000, #39A900
Tetradic#A90039, #8DA900, #00A970

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8D76FF
Lighter +30%#6243FF
Lighter +20%#3810FF
Lighter +10%#2400DC
Darker −10%#140076
Darker −20%#0B0043
Darker −30%#030010
Darker −40%#000000
More saturated +25%#1C00A9
Less saturated −25%#2A1594

Channel breakdown

R28
G0
B169
Red28 (11%)
Green0 (0%)
Blue169 (66.3%)
Hue249.94°
Saturation (HSL)100%
Lightness33.14%
Dominant channelBlue
Hex per channelR 1C · G 00 · B A9

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Every value on this page was computed from “1c00a9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.