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Recognised as Colour

#2100BB

  • #2100BB
  • Blue
  • Dark
  • Nearest: Medium blue

#2100BB is a blue with RGB values 33, 0, 187 and HSL 251°, 100%, 37%. It is a dark colour, so white text on it reaches 11.8:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#2100BB#2100BB
HEX#2100BB
RGBrgb(33, 0, 187)
RGB (0–1)0.1294, 0, 0.7333
RGB percentages12.9%, 0%, 73.3%
HSLhsl(250.6, 100%, 36.7%)
HSV / HSBhsv(250.6, 100%, 73.3%)
CMYK82.4%, 100%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,162,875
CSS custom property--colour: #2100BB;

Brightness & contrast

Relative luminance0.03911WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.78:1
Contrast with white11.78:1WCAG normal text: AAA
Contrast with black1.78:1WCAG normal text: Fail
Greyscale equivalent#151515
Inverted#DEFF44

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0040BFno red cones; affects about 1% of men; ΔE 32.2 from the original
Deuteranopia#002EB8no green cones; the most common form, about 1% of men; ΔE 21.8 from the original
Tritanopia#004C6Cno blue cones; rare, and affects men and women equally; ΔE 92.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.78:1WCAG large text: AAA
Contrast with black, large text1.78:1WCAG large text: Fail

Named colours

Medium blue · ΔE 9.1Dark blue · ΔE 21.3Blue violet · ΔE 21.8Dark violet · ΔE 24.7Navy · ΔE 26.6Blue · ΔE 30.5
Nearest named CSS colourMedium blue (#0000CD)ΔE 9.09, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9ABB00
Analogous#003CBB, #7F00BB
Triadic#BB2100, #00BB21
Split complementary#BB7F00, #3CBB00
Tetradic#BB003C, #9ABB00, #00BB7F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9D88FF
Lighter +30%#7355FF
Lighter +20%#4922FF
Lighter +10%#2A00EE
Darker −10%#180088
Darker −20%#0F0055
Darker −30%#060022
Darker −40%#000000
More saturated +25%#2100BB
Less saturated −25%#3017A4

Channel breakdown

R33
G0
B187
Red33 (12.9%)
Green0 (0%)
Blue187 (73.3%)
Hue250.59°
Saturation (HSL)100%
Lightness36.67%
Dominant channelBlue
Hex per channelR 21 · G 00 · B BB

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Every value on this page was computed from “2100bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.