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Recognised as Colour

#1F40DB

  • #1F40DB
  • Blue
  • Dark
  • Nearest: Medium slateblue

#1F40DB is a blue with RGB values 31, 64, 219 and HSL 229°, 75%, 49%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Medium slateblue.

Colour values

#1F40DB#1F40DB
HEX#1F40DB
RGBrgb(31, 64, 219)
RGB (0–1)0.1216, 0.251, 0.8588
RGB percentages12.2%, 25.1%, 85.9%
HSLhsl(229.5, 75.2%, 49%)
HSV / HSBhsv(229.5, 85.8%, 85.9%)
CMYK85.8%, 70.8%, 0%, 14.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,048,219
CSS custom property--colour: #1F40DB;

Brightness & contrast

Relative luminance0.09073WCAG 2.x, 0 is black and 1 is white
Perceived brightness90.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.46:1
Contrast with white7.46:1WCAG normal text: AAA
Contrast with black2.81:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#E0BF24

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005EE0no red cones; affects about 1% of men; ΔE 21.5 from the original
Deuteranopia#004CD8no green cones; the most common form, about 1% of men; ΔE 11 from the original
Tritanopia#006C89no blue cones; rare, and affects men and women equally; ΔE 84.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.46:1WCAG large text: AAA
Contrast with black, large text2.81:1WCAG large text: Fail

Named colours

Medium slateblue · ΔE 23.1Blue violet · ΔE 24.8Dark blue · ΔE 25Medium blue · ΔE 25.6Slate blue · ΔE 27.2Royal blue · ΔE 28.3
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 23.09, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DBBA1F
Analogous#1F9EDB, #5C1FDB
Triadic#DB1F40, #40DB1F
Split complementary#DB5C1F, #9EDB1F
Tetradic#DB1F9E, #DBBA1F, #1FDB5C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CED5F8
Lighter +30%#A1AFF2
Lighter +20%#7589EB
Lighter +10%#4864E5
Darker −10%#1933AE
Darker −20%#122682
Darker −30%#0C1955
Darker −40%#060C28
More saturated +25%#002CFA
Less saturated −25%#3E54BC

Channel breakdown

R31
G64
B219
Red31 (12.2%)
Green64 (25.1%)
Blue219 (85.9%)
Hue229.47°
Saturation (HSL)75.2%
Lightness49.02%
Dominant channelBlue
Hex per channelR 1F · G 40 · B DB

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Every value on this page was computed from “1f40db” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.