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Recognised as Colour

#1851DF

  • #1851DF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#1851DF is a blue with RGB values 24, 81, 223 and HSL 223°, 81%, 48%. It is a dark colour, so white text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#1851DF#1851DF
HEX#1851DF
RGBrgb(24, 81, 223)
RGB (0–1)0.0941, 0.3176, 0.8745
RGB percentages9.4%, 31.8%, 87.5%
HSLhsl(222.8, 80.6%, 48.4%)
HSV / HSBhsv(222.8, 89.2%, 87.5%)
CMYK89.2%, 63.7%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,593,823
CSS custom property--colour: #1851DF;

Brightness & contrast

Relative luminance0.11407WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.4:1
Contrast with white6.4:1WCAG normal text: AA
Contrast with black3.28:1WCAG normal text: Fail
Greyscale equivalent#4F4F4F
Inverted#E7AE20

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0068E4no red cones; affects about 1% of men; ΔE 16.5 from the original
Deuteranopia#0056DCno green cones; the most common form, about 1% of men; ΔE 5.9 from the original
Tritanopia#007791no blue cones; rare, and affects men and women equally; ΔE 78 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.4:1WCAG large text: AAA
Contrast with black, large text3.28:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 16.8Royal blue · ΔE 17.4Slate blue · ΔE 19.5Dark blue · ΔE 29.8Medium purple · ΔE 30.3Rebecca purple · ΔE 30.8
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 16.76, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DFA618
Analogous#18B4DF, #4218DF
Triadic#DF1851, #51DF18
Split complementary#DF4318, #B4DF18
Tetradic#DF18B5, #DFA618, #18DF43

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CAD7F9
Lighter +30%#9CB5F4
Lighter +20%#6E93EF
Lighter +10%#4071EA
Darker −10%#1340B1
Darker −20%#0E3083
Darker −30%#091F55
Darker −40%#040E27
More saturated +25%#0047F7
Less saturated −25%#375EC0

Channel breakdown

R24
G81
B223
Red24 (9.4%)
Green81 (31.8%)
Blue223 (87.5%)
Hue222.81°
Saturation (HSL)80.57%
Lightness48.43%
Dominant channelBlue
Hex per channelR 18 · G 51 · B DF

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Every value on this page was computed from “1851df” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.