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Colour

#1F65CF

  • #1F65CF
  • Blue
  • Dark
  • Nearest: Royal blue

#1F65CF is a blue with RGB values 31, 101, 207 and HSL 216°, 74%, 47%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#1F65CF#1F65CF
HEX#1F65CF
RGBrgb(31, 101, 207)
RGB (0–1)0.1216, 0.3961, 0.8118
RGB percentages12.2%, 39.6%, 81.2%
HSLhsl(216.1, 73.9%, 46.7%)
HSV / HSBhsv(216.1, 85%, 81.2%)
CMYK85%, 51.2%, 0%, 18.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,057,679
CSS custom property--colour: #1F65CF;

Brightness & contrast

Relative luminance0.14104WCAG 2.x, 0 is black and 1 is white
Perceived brightness105.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.5:1
Contrast with white5.5:1WCAG normal text: AA
Contrast with black3.82:1WCAG normal text: Fail
Greyscale equivalent#5E5E5E
Inverted#E09A30

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1B71D3no red cones; affects about 1% of men; ΔE 8.1 from the original
Deuteranopia#0062CDno green cones; the most common form, about 1% of men; ΔE 1.8 from the original
Tritanopia#007F90no blue cones; rare, and affects men and women equally; ΔE 60 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.5:1WCAG large text: AAA
Contrast with black, large text3.82:1WCAG large text: AA

Named colours

Royal blue · ΔE 9.6Dodgerblue · ΔE 17.5Slate blue · ΔE 17.8Cornflower blue · ΔE 22.8Medium purple · ΔE 23.6Dark slateblue · ΔE 24.2
Nearest named CSS colourRoyal blue (#4169E1)ΔE 9.63, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CF891F
Analogous#1FBDCF, #311FCF
Triadic#CF1F65, #65CF1F
Split complementary#CF311F, #BDCF1F
Tetradic#CF1FBD, #CF891F, #1FCF31

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C4D8F6
Lighter +30%#97BBF0
Lighter +20%#6B9DE9
Lighter +10%#3F80E2
Darker −10%#184FA3
Darker −20%#123A76
Darker −30%#0B244A
Darker −40%#040E1E
More saturated +25%#015FED
Less saturated −25%#3D6BB1

Channel breakdown

R31
G101
B207
Red31 (12.2%)
Green101 (39.6%)
Blue207 (81.2%)
Hue216.14°
Saturation (HSL)73.95%
Lightness46.67%
Dominant channelBlue
Hex per channelR 1F · G 65 · B CF

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Every value on this page was computed from “1f65cf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.