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Recognised as Colour

#1573D8

  • #1573D8
  • Blue
  • Dark
  • Nearest: Dodgerblue

#1573D8 is a blue with RGB values 21, 115, 216 and HSL 211°, 82%, 46%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#1573D8#1573D8
HEX#1573D8
RGBrgb(21, 115, 216)
RGB (0–1)0.0824, 0.451, 0.8471
RGB percentages8.2%, 45.1%, 84.7%
HSLhsl(211.1, 82.3%, 46.5%)
HSV / HSBhsv(211.1, 90.3%, 84.7%)
CMYK90.3%, 46.8%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,405,912
CSS custom property--colour: #1573D8;

Brightness & contrast

Relative luminance0.17379WCAG 2.x, 0 is black and 1 is white
Perceived brightness115 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.69:1
Contrast with white4.69:1WCAG normal text: AA
Contrast with black4.48:1WCAG normal text: Fail
Greyscale equivalent#666666
Inverted#EA8C27

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#397DDCno red cones; affects about 1% of men; ΔE 5.8 from the original
Deuteranopia#006CD6no green cones; the most common form, about 1% of men; ΔE 4.6 from the original
Tritanopia#008C9Bno blue cones; rare, and affects men and women equally; ΔE 56.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.69:1WCAG large text: AAA
Contrast with black, large text4.48:1WCAG large text: AA

Named colours

Dodgerblue · ΔE 11.9Royal blue · ΔE 15.3Cornflower blue · ΔE 16.5Slate blue · ΔE 23.8Medium purple · ΔE 26.6Dark slateblue · ΔE 28
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 11.87, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D87A15
Analogous#15D4D8, #1815D8
Triadic#D81573, #73D815
Split complementary#D81915, #D4D815
Tetradic#D815D4, #D87A15, #15D819

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C0DBF9
Lighter +30%#92C1F4
Lighter +20%#63A7F0
Lighter +10%#358DEB
Darker −10%#105AAA
Darker −20%#0C427B
Darker −30%#07294D
Darker −40%#03101E
More saturated +25%#0072ED
Less saturated −25%#3374BA

Channel breakdown

R21
G115
B216
Red21 (8.2%)
Green115 (45.1%)
Blue216 (84.7%)
Hue211.08°
Saturation (HSL)82.28%
Lightness46.47%
Dominant channelBlue
Hex per channelR 15 · G 73 · B D8

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Every value on this page was computed from “1573d8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.