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Recognised as Colour

#10398D

  • #10398D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#10398D is a blue with RGB values 16, 57, 141 and HSL 220°, 80%, 31%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#10398D#10398D
HEX#10398D
RGBrgb(16, 57, 141)
RGB (0–1)0.0627, 0.2235, 0.5529
RGB percentages6.3%, 22.4%, 55.3%
HSLhsl(220.3, 79.6%, 30.8%)
HSV / HSBhsv(220.3, 88.7%, 55.3%)
CMYK88.7%, 59.6%, 0%, 44.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,063,309
CSS custom property--colour: #10398D;

Brightness & contrast

Relative luminance0.0496WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.54:1
Contrast with white10.54:1WCAG normal text: AAA
Contrast with black1.99:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#EFC672

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004590no red cones; affects about 1% of men; ΔE 9.5 from the original
Deuteranopia#00398Bno green cones; the most common form, about 1% of men; ΔE 1.9 from the original
Tritanopia#004E5Dno blue cones; rare, and affects men and women equally; ΔE 50.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.54:1WCAG large text: AAA
Contrast with black, large text1.99:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10.7Midnight blue · ΔE 15.5Rebecca purple · ΔE 23.4Slate blue · ΔE 25.4Royal blue · ΔE 26.6Indigo · ΔE 31.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.72, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8D6410
Analogous#10778D, #26108D
Triadic#8D1039, #398D10
Split complementary#8D2610, #778D10
Tetradic#8D1077, #8D6410, #108D26

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#79A0F0
Lighter +30%#4B80EB
Lighter +20%#1E5FE5
Lighter +10%#154CBB
Darker −10%#0B265F
Darker −20%#061431
Darker −30%#000104
Darker −40%#000000
More saturated +25%#00339D
Less saturated −25%#244079

Channel breakdown

R16
G57
B141
Red16 (6.3%)
Green57 (22.4%)
Blue141 (55.3%)
Hue220.32°
Saturation (HSL)79.62%
Lightness30.78%
Dominant channelBlue
Hex per channelR 10 · G 39 · B 8D

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Every value on this page was computed from “10398d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.