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Recognised as Colour

#1645A4

  • #1645A4
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1645A4 is a blue with RGB values 22, 69, 164 and HSL 220°, 76%, 36%. It is a dark colour, so white text on it reaches 8.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1645A4#1645A4
HEX#1645A4
RGBrgb(22, 69, 164)
RGB (0–1)0.0863, 0.2706, 0.6431
RGB percentages8.6%, 27.1%, 64.3%
HSLhsl(220.1, 76.3%, 36.5%)
HSV / HSBhsv(220.1, 86.6%, 64.3%)
CMYK86.6%, 57.9%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,459,620
CSS custom property--colour: #1645A4;

Brightness & contrast

Relative luminance0.07107WCAG 2.x, 0 is black and 1 is white
Perceived brightness77.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.67:1
Contrast with white8.67:1WCAG normal text: AAA
Contrast with black2.42:1WCAG normal text: Fail
Greyscale equivalent#424242
Inverted#E9BA5B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0052A7no red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#0045A2no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#005D6Dno blue cones; rare, and affects men and women equally; ΔE 56 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.67:1WCAG large text: AAA
Contrast with black, large text2.42:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14Royal blue · ΔE 19Slate blue · ΔE 19.4Midnight blue · ΔE 19.7Rebecca purple · ΔE 22.4Medium purple · ΔE 27.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A47516
Analogous#168CA4, #2E16A4
Triadic#A41645, #45A416
Split complementary#A42E16, #8CA416
Tetradic#A4168C, #A47516, #16A42E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#95B4F1
Lighter +30%#6893EB
Lighter +20%#3B73E5
Lighter +10%#1C58D1
Darker −10%#103277
Darker −20%#0A1F4A
Darker −30%#040C1D
Darker −40%#000000
More saturated +25%#003EBA
Less saturated −25%#2D4D8D

Channel breakdown

R22
G69
B164
Red22 (8.6%)
Green69 (27.1%)
Blue164 (64.3%)
Hue220.14°
Saturation (HSL)76.34%
Lightness36.47%
Dominant channelBlue
Hex per channelR 16 · G 45 · B A4

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Every value on this page was computed from “1645a4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.