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Recognised as Colour

#191DA1

  • #191DA1
  • Blue
  • Dark
  • Nearest: Dark blue

#191DA1 is a blue with RGB values 25, 29, 161 and HSL 238°, 73%, 36%. It is a dark colour, so white text on it reaches 12.1:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#191DA1#191DA1
HEX#191DA1
RGBrgb(25, 29, 161)
RGB (0–1)0.098, 0.1137, 0.6314
RGB percentages9.8%, 11.4%, 63.1%
HSLhsl(238.2, 73.1%, 36.5%)
HSV / HSBhsv(238.2, 84.5%, 63.1%)
CMYK84.5%, 82%, 0%, 36.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,645,985
CSS custom property--colour: #191DA1;

Brightness & contrast

Relative luminance0.03659WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.13:1
Contrast with white12.13:1WCAG normal text: AAA
Contrast with black1.73:1WCAG normal text: Fail
Greyscale equivalent#262626
Inverted#E6E25E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003DA5no red cones; affects about 1% of men; ΔE 22.6 from the original
Deuteranopia#002F9Fno green cones; the most common form, about 1% of men; ΔE 14 from the original
Tritanopia#004760no blue cones; rare, and affects men and women equally; ΔE 74.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.13:1WCAG large text: AAA
Contrast with black, large text1.73:1WCAG large text: Fail

Named colours

Dark blue · ΔE 8.8Navy · ΔE 10.7Indigo · ΔE 17Rebecca purple · ΔE 24.7Midnight blue · ΔE 25.4Slate blue · ΔE 27.6
Nearest named CSS colourDark blue (#00008B)ΔE 8.81, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A19D19
Analogous#1961A1, #5919A1
Triadic#A1191D, #1DA119
Split complementary#A15919, #61A119
Tetradic#A11961, #A19D19, #19A159

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#979AEF
Lighter +30%#6B6FE8
Lighter +20%#3F44E1
Lighter +10%#2025CD
Darker −10%#121575
Darker −20%#0B0D49
Darker −30%#04051D
Darker −40%#000000
More saturated +25%#0207B8
Less saturated −25%#30338A

Channel breakdown

R25
G29
B161
Red25 (9.8%)
Green29 (11.4%)
Blue161 (63.1%)
Hue238.24°
Saturation (HSL)73.12%
Lightness36.47%
Dominant channelBlue
Hex per channelR 19 · G 1D · B A1

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Every value on this page was computed from “191da1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.