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Recognised as Colour

#1F5CA4

  • #1F5CA4
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1F5CA4 is a blue with RGB values 31, 92, 164 and HSL 212°, 68%, 38%. It is a dark colour, so white text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1F5CA4#1F5CA4
HEX#1F5CA4
RGBrgb(31, 92, 164)
RGB (0–1)0.1216, 0.3608, 0.6431
RGB percentages12.2%, 36.1%, 64.3%
HSLhsl(212.5, 68.2%, 38.2%)
HSV / HSBhsv(212.5, 81.1%, 64.3%)
CMYK81.1%, 43.9%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,055,332
CSS custom property--colour: #1F5CA4;

Brightness & contrast

Relative luminance0.10626WCAG 2.x, 0 is black and 1 is white
Perceived brightness91.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.72:1
Contrast with white6.72:1WCAG normal text: AA
Contrast with black3.13:1WCAG normal text: Fail
Greyscale equivalent#545454
Inverted#E0A35B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3762A7no red cones; affects about 1% of men; ΔE 4 from the original
Deuteranopia#1D56A3no green cones; the most common form, about 1% of men; ΔE 4.6 from the original
Tritanopia#006D78no blue cones; rare, and affects men and women equally; ΔE 42.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.72:1WCAG large text: AAA
Contrast with black, large text3.13:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 20.4Steel blue · ΔE 21.5Cornflower blue · ΔE 23.6Dodgerblue · ΔE 28.1Royal blue · ΔE 29.5Slate blue · ΔE 32.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 20.36, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A4671F
Analogous#1F9EA4, #251FA4
Triadic#A41F5C, #5CA41F
Split complementary#A4241F, #9FA41F
Tetradic#A41F9F, #A4671F, #1FA425

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A2C4ED
Lighter +30%#77A9E5
Lighter +20%#4C8EDD
Lighter +10%#2774CF
Darker −10%#174479
Darker −20%#0F2C4E
Darker −30%#071423
Darker −40%#000000
More saturated +25%#075ABC
Less saturated −25%#375E8C

Channel breakdown

R31
G92
B164
Red31 (12.2%)
Green92 (36.1%)
Blue164 (64.3%)
Hue212.48°
Saturation (HSL)68.21%
Lightness38.24%
Dominant channelBlue
Hex per channelR 1F · G 5C · B A4

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Every value on this page was computed from “1f5ca4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.