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Recognised as Colour

#1F3ADA

  • #1F3ADA
  • Blue
  • Dark
  • Nearest: Medium blue

#1F3ADA is a blue with RGB values 31, 58, 218 and HSL 231°, 75%, 49%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#1F3ADA#1F3ADA
HEX#1F3ADA
RGBrgb(31, 58, 218)
RGB (0–1)0.1216, 0.2275, 0.8549
RGB percentages12.2%, 22.7%, 85.5%
HSLhsl(231.3, 75.1%, 48.8%)
HSV / HSBhsv(231.3, 85.8%, 85.5%)
CMYK85.8%, 73.4%, 0%, 14.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,046,682
CSS custom property--colour: #1F3ADA;

Brightness & contrast

Relative luminance0.08379WCAG 2.x, 0 is black and 1 is white
Perceived brightness87.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.85:1
Contrast with white7.85:1WCAG normal text: AAA
Contrast with black2.68:1WCAG normal text: Fail
Greyscale equivalent#404040
Inverted#E0C525

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005BDFno red cones; affects about 1% of men; ΔE 23.4 from the original
Deuteranopia#0048D7no green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#006987no blue cones; rare, and affects men and women equally; ΔE 87.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.85:1WCAG large text: AAA
Contrast with black, large text2.68:1WCAG large text: Fail

Named colours

Medium blue · ΔE 21.8Blue violet · ΔE 22.8Dark blue · ΔE 24.5Medium slateblue · ΔE 26.1Navy · ΔE 28.4Dark orchid · ΔE 28.7
Nearest named CSS colourMedium blue (#0000CD)ΔE 21.8, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DABF1F
Analogous#1F98DA, #611FDA
Triadic#DA1F3A, #3ADA1F
Split complementary#DA611F, #98DA1F
Tetradic#DA1F98, #DABF1F, #1FDA61

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CDD3F8
Lighter +30%#A0ACF2
Lighter +20%#7485EB
Lighter +10%#475EE5
Darker −10%#192EAD
Darker −20%#122281
Darker −30%#0C1654
Darker −40%#060A27
More saturated +25%#0024F9
Less saturated −25%#3E50BB

Channel breakdown

R31
G58
B218
Red31 (12.2%)
Green58 (22.7%)
Blue218 (85.5%)
Hue231.34°
Saturation (HSL)75.1%
Lightness48.82%
Dominant channelBlue
Hex per channelR 1F · G 3A · B DA

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Every value on this page was computed from “1f3ada” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.