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Recognised as Colour

#21197B

  • #21197B
  • Blue
  • Dark
  • Nearest: Midnight blue

#21197B is a blue with RGB values 33, 25, 123 and HSL 245°, 66%, 29%. It is a dark colour, so white text on it reaches 14.1:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#21197B#21197B
HEX#21197B
RGBrgb(33, 25, 123)
RGB (0–1)0.1294, 0.098, 0.4824
RGB percentages12.9%, 9.8%, 48.2%
HSLhsl(244.9, 66.2%, 29%)
HSV / HSBhsv(244.9, 79.7%, 48.2%)
CMYK73.2%, 79.7%, 0%, 51.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,169,211
CSS custom property--colour: #21197B;

Brightness & contrast

Relative luminance0.02449WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.1:1
Contrast with white14.1:1WCAG normal text: AAA
Contrast with black1.49:1WCAG normal text: Fail
Greyscale equivalent#222222
Inverted#DEE684

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00307Eno red cones; affects about 1% of men; ΔE 18.2 from the original
Deuteranopia#002779no green cones; the most common form, about 1% of men; ΔE 13 from the original
Tritanopia#003649no blue cones; rare, and affects men and women equally; ΔE 58.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text14.1:1WCAG large text: AAA
Contrast with black, large text1.49:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 6.4Indigo · ΔE 15.6Navy · ΔE 16.4Rebecca purple · ΔE 17.8Dark slateblue · ΔE 20.3Dark blue · ΔE 20.8
Nearest named CSS colourMidnight blue (#191970)ΔE 6.42, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#737B19
Analogous#19427B, #52197B
Triadic#7B2119, #197B21
Split complementary#7B5219, #427B19
Tetradic#7B1942, #737B19, #197B52

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#847CE4
Lighter +30%#5D51DC
Lighter +20%#382AD0
Lighter +10%#2C22A5
Darker −10%#161051
Darker −20%#0A0826
Darker −30%#000000
Darker −40%#000000
More saturated +25%#12078E
Less saturated −25%#302C69

Channel breakdown

R33
G25
B123
Red33 (12.9%)
Green25 (9.8%)
Blue123 (48.2%)
Hue244.9°
Saturation (HSL)66.22%
Lightness29.02%
Dominant channelBlue
Hex per channelR 21 · G 19 · B 7B

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Every value on this page was computed from “21197b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.