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Recognised as Colour

#1881FF

  • #1881FF
  • Blue
  • Dark
  • Nearest: Royal blue

#1881FF is a blue with RGB values 24, 129, 255 and HSL 213°, 100%, 55%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#1881FF#1881FF
HEX#1881FF
RGBrgb(24, 129, 255)
RGB (0–1)0.0941, 0.5059, 1
RGB percentages9.4%, 50.6%, 100%
HSLhsl(212.7, 100%, 54.7%)
HSV / HSBhsv(212.7, 90.6%, 100%)
CMYK90.6%, 49.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,606,143
CSS custom property--colour: #1881FF;

Brightness & contrast

Relative luminance0.23115WCAG 2.x, 0 is black and 1 is white
Perceived brightness131.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.62:1
Contrast with white3.73:1WCAG normal text: Fail
Contrast with black5.62:1WCAG normal text: AA
Greyscale equivalent#747474
Inverted#E77E00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2E8FFFno red cones; affects about 1% of men; ΔE 10.7 from the original
Deuteranopia#007BFDno green cones; the most common form, about 1% of men; ΔE 3.7 from the original
Tritanopia#00A0B4no blue cones; rare, and affects men and women equally; ΔE 68.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.73:1WCAG large text: AA
Contrast with black, large text5.62:1WCAG large text: AAA

Named colours

Royal blue · ΔE 11.5Dodgerblue · ΔE 11.9Medium slateblue · ΔE 22.9Slate blue · ΔE 23.4Cornflower blue · ΔE 23.9Medium purple · ΔE 26.9
Nearest named CSS colourRoyal blue (#4169E1)ΔE 11.52, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF9618
Analogous#18F4FF, #2318FF
Triadic#FF1881, #81FF18
Split complementary#FF2318, #F4FF18
Tetradic#FF18F4, #FF9618, #18FF23

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E4F0FF
Lighter +30%#B1D4FF
Lighter +20%#7EB9FF
Lighter +10%#4B9DFF
Darker −10%#0068E4
Darker −20%#0050B1
Darker −30%#00397E
Darker −40%#00224B
More saturated +25%#1881FF
Less saturated −25%#3584E2

Channel breakdown

R24
G129
B255
Red24 (9.4%)
Green129 (50.6%)
Blue255 (100%)
Hue212.73°
Saturation (HSL)100%
Lightness54.71%
Dominant channelBlue
Hex per channelR 18 · G 81 · B FF

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Every value on this page was computed from “1881ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.