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Colour

#1B1A4D

  • #1B1A4D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1B1A4D is a blue with RGB values 27, 26, 77 and HSL 241°, 50%, 20%. It is a dark colour, so white text on it reaches 16.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B1A4D#1B1A4D
HEX#1B1A4D
RGBrgb(27, 26, 77)
RGB (0–1)0.1059, 0.102, 0.302
RGB percentages10.6%, 10.2%, 30.2%
HSLhsl(241.2, 49.5%, 20.2%)
HSV / HSBhsv(241.2, 66.2%, 30.2%)
CMYK64.9%, 66.2%, 0%, 69.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,776,205
CSS custom property--colour: #1B1A4D;

Brightness & contrast

Relative luminance0.01508WCAG 2.x, 0 is black and 1 is white
Perceived brightness35.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.13:1
Contrast with white16.13:1WCAG normal text: AAA
Contrast with black1.3:1WCAG normal text: Fail
Greyscale equivalent#1E1E1E
Inverted#E4E5B2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00234Fno red cones; affects about 1% of men; ΔE 10.2 from the original
Deuteranopia#001F4Cno green cones; the most common form, about 1% of men; ΔE 8.4 from the original
Tritanopia#002630no blue cones; rare, and affects men and women equally; ΔE 34.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.13:1WCAG large text: AAA
Contrast with black, large text1.3:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 22.5Midnight blue · ΔE 22.9Rebecca purple · ΔE 35.6Black · ΔE 38.4Indigo · ΔE 40.8Navy · ΔE 44.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 22.49, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4C4D1A
Analogous#1A324D, #351A4D
Triadic#4D1B1A, #1A4D1B
Split complementary#4D351A, #324D1A
Tetradic#4D1A32, #4C4D1A, #1A4D35

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6967CC
Lighter +30%#4441BF
Lighter +20%#363499
Lighter +10%#282773
Darker −10%#0E0D27
Darker −20%#000001
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F0D5A
Less saturated −25%#272740

Channel breakdown

R27
G26
B77
Red27 (10.6%)
Green26 (10.2%)
Blue77 (30.2%)
Hue241.18°
Saturation (HSL)49.51%
Lightness20.2%
Dominant channelBlue
Hex per channelR 1B · G 1A · B 4D

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Every value on this page was computed from “1b1a4d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.