Recognised as Colour

#1789FF

#1789FF
Blue
Dark
Nearest: Dodgerblue

#1789FF is a blue with RGB values 23, 137, 255 and HSL 211°, 100%, 55%. It is a dark colour, so black text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#1789FF#1789FF

HEX#1789FF

RGBrgb(23, 137, 255)

RGB (0–1)0.0902, 0.5373, 1

RGB percentages9%, 53.7%, 100%

HSLhsl(210.5, 100%, 54.5%)

HSV / HSBhsv(210.5, 91%, 100%)

CMYK91%, 46.3%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,542,655

CSS custom property--colour: #1789FF;

Brightness & contrast

Relative luminance0.25293WCAG 2.x, 0 is black and 1 is white

Perceived brightness136.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.06:1

Contrast with white3.47:1WCAG normal text: Fail

Contrast with black6.06:1WCAG normal text: AA

Greyscale equivalent#797979

Inverted#E87600

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4594FFno red cones; affects about 1% of men; ΔE 8.1 from the original

Deuteranopia#0081FDno green cones; the most common form, about 1% of men; ΔE 5.2 from the original

Tritanopia#00A6B8no blue cones; rare, and affects men and women equally; ΔE 64 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text3.47:1WCAG large text: AA

Contrast with black, large text6.06:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 5.5 Royal blue · ΔE 15.7 Cornflower blue · ΔE 18.5 Slate blue · ΔE 26.7 Medium slateblue · ΔE 27.7 Medium purple · ΔE 28.4

Nearest named CSS colourDodgerblue (#1E90FF)ΔE 5.48, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#FF8D17

Analogous#17FDFF, #1917FF

Triadic#FF1789, #89FF17

Split complementary#FF1917, #FDFF17

Tetradic#FF17FD, #FF8D17, #17FF19

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#E3F1FF

Lighter +30%#B0D7FF

Lighter +20%#7DBDFF

Lighter +10%#4AA3FF

Darker −10%#0070E3

Darker −20%#0056B0

Darker −30%#003D7D

Darker −40%#00244A

More saturated +25%#1789FF

Less saturated −25%#3489E2

Channel breakdown

R23

G137

B255

Red23 (9%)

Green137 (53.7%)

Blue255 (100%)

Hue210.52°

Saturation (HSL)100%

Lightness54.51%

Dominant channelBlue

Hex per channelR 17 · G 89 · B FF

Keep nerding

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#1789FF

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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