Colour

#1780FF

#1780FF
Blue
Dark
Nearest: Royal blue

#1780FF is a blue with RGB values 23, 128, 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

#1780FF#1780FF

HEX#1780FF

RGBrgb(23, 128, 255)

RGB (0–1)0.0902, 0.502, 1

RGB percentages9%, 50.2%, 100%

HSLhsl(212.8, 100%, 54.5%)

HSV / HSBhsv(212.8, 91%, 100%)

CMYK91%, 49.8%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,540,351

CSS custom property--colour: #1780FF;

Brightness & contrast

Relative luminance0.22841WCAG 2.x, 0 is black and 1 is white

Perceived brightness131.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.57:1

Contrast with white3.77:1WCAG normal text: Fail

Contrast with black5.57:1WCAG normal text: AA

Greyscale equivalent#737373

Inverted#E87F00

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2A8EFFno red cones; affects about 1% of men; ΔE 10.8 from the original

Deuteranopia#007AFDno green cones; the most common form, about 1% of men; ΔE 3.7 from the original

Tritanopia#009FB3no blue cones; rare, and affects men and women equally; ΔE 68.9 from the original

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

Contrast with white, large text3.77:1WCAG large text: AA

Contrast with black, large text5.57:1WCAG large text: AAA

Named colours

Royal blue · ΔE 11.2 Dodgerblue · ΔE 12.7 Medium slateblue · ΔE 22.4 Slate blue · ΔE 23.1 Cornflower blue · ΔE 24.6 Medium purple · ΔE 26.9

Nearest named CSS colourRoyal blue (#4169E1)ΔE 11.19, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#FF9617

Analogous#17F4FF, #2217FF

Triadic#FF1780, #80FF17

Split complementary#FF2217, #F4FF17

Tetradic#FF17F4, #FF9617, #17FF22

Tints, shades & saturation

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

Lighter +40%#E3F0FF

Lighter +30%#B0D4FF

Lighter +20%#7DB8FF

Lighter +10%#4A9CFF

Darker −10%#0067E3

Darker −20%#0050B0

Darker −30%#00397D

Darker −40%#00214A

More saturated +25%#1780FF

Less saturated −25%#3483E2

Channel breakdown

R23

G128

B255

Red23 (9%)

Green128 (50.2%)

Blue255 (100%)

Hue212.84°

Saturation (HSL)100%

Lightness54.51%

Dominant channelBlue

Hex per channelR 17 · G 80 · B FF

Keep nerding

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#1780FF

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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