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Recognised as Colour

#2100B0

  • #2100B0
  • Blue
  • Dark
  • Nearest: Medium blue

#2100B0 is a blue with RGB values 33, 0, 176 and HSL 251°, 100%, 35%. It is a dark colour, so white text on it reaches 12.4:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#2100B0#2100B0
HEX#2100B0
RGBrgb(33, 0, 176)
RGB (0–1)0.1294, 0, 0.6902
RGB percentages12.9%, 0%, 69%
HSLhsl(251.3, 100%, 34.5%)
HSV / HSBhsv(251.3, 100%, 69%)
CMYK81.3%, 100%, 0%, 31%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,162,864
CSS custom property--colour: #2100B0;

Brightness & contrast

Relative luminance0.03458WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.41:1
Contrast with white12.41:1WCAG normal text: AAA
Contrast with black1.69:1WCAG normal text: Fail
Greyscale equivalent#141414
Inverted#DEFF4F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003CB4no red cones; affects about 1% of men; ΔE 30.8 from the original
Deuteranopia#002CADno green cones; the most common form, about 1% of men; ΔE 21.7 from the original
Tritanopia#004766no blue cones; rare, and affects men and women equally; ΔE 87.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.41:1WCAG large text: AAA
Contrast with black, large text1.69:1WCAG large text: Fail

Named colours

Medium blue · ΔE 14.1Dark blue · ΔE 16.4Navy · ΔE 21.6Blue violet · ΔE 23Dark violet · ΔE 25.6Indigo · ΔE 27.7
Nearest named CSS colourMedium blue (#0000CD)ΔE 14.07, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8FB000
Analogous#0037B0, #7900B0
Triadic#B02100, #00B021
Split complementary#B07900, #37B000
Tetradic#B00037, #8FB000, #00B079

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#957DFF
Lighter +30%#6C4AFF
Lighter +20%#4217FF
Lighter +10%#2B00E3
Darker −10%#17007D
Darker −20%#0E004A
Darker −30%#040017
Darker −40%#000000
More saturated +25%#2100B0
Less saturated −25%#2F169A

Channel breakdown

R33
G0
B176
Red33 (12.9%)
Green0 (0%)
Blue176 (69%)
Hue251.25°
Saturation (HSL)100%
Lightness34.51%
Dominant channelBlue
Hex per channelR 21 · G 00 · B B0

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Every value on this page was computed from “2100b0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.