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Recognised as Colour

#1509DD

  • #1509DD
  • Blue
  • Dark
  • Nearest: Medium blue

#1509DD is a blue with RGB values 21, 9, 221 and HSL 243°, 92%, 45%. It is a dark colour, so white text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#1509DD#1509DD
HEX#1509DD
RGBrgb(21, 9, 221)
RGB (0–1)0.0824, 0.0353, 0.8667
RGB percentages8.2%, 3.5%, 86.7%
HSLhsl(243.4, 92.2%, 45.1%)
HSV / HSBhsv(243.4, 95.9%, 86.7%)
CMYK90.5%, 95.9%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,378,781
CSS custom property--colour: #1509DD;

Brightness & contrast

Relative luminance0.05575WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.93:1
Contrast with white9.93:1WCAG normal text: AAA
Contrast with black2.12:1WCAG normal text: Fail
Greyscale equivalent#1B1B1B
Inverted#EAF622

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004DE2no red cones; affects about 1% of men; ΔE 34.9 from the original
Deuteranopia#0037DAno green cones; the most common form, about 1% of men; ΔE 22.3 from the original
Tritanopia#005D82no blue cones; rare, and affects men and women equally; ΔE 104.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.93:1WCAG large text: AAA
Contrast with black, large text2.12:1WCAG large text: Fail

Named colours

Medium blue · ΔE 5.5Blue · ΔE 16.4Blue violet · ΔE 24.7Dark violet · ΔE 28.1Dark blue · ΔE 35.4Dark orchid · ΔE 38.4
Nearest named CSS colourMedium blue (#0000CD)ΔE 5.53, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D1DD09
Analogous#0967DD, #7F09DD
Triadic#DD1509, #09DD15
Split complementary#DD7F09, #67DD09
Tetradic#DD0967, #D1DD09, #09DD7F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BAB6FC
Lighter +30%#8C85FA
Lighter +20%#5D54F8
Lighter +10%#2F23F6
Darker −10%#1007AC
Darker −20%#0C057B
Darker −30%#07034A
Darker −40%#020119
More saturated +25%#0D00E6
Less saturated −25%#2E26C0

Channel breakdown

R21
G9
B221
Red21 (8.2%)
Green9 (3.5%)
Blue221 (86.7%)
Hue243.4°
Saturation (HSL)92.17%
Lightness45.1%
Dominant channelBlue
Hex per channelR 15 · G 09 · B DD

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Every value on this page was computed from “1509dd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.