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Recognised as Colour

#305CA3

  • #305CA3
  • Blue
  • Dark
  • Nearest: Dark slateblue

#305CA3 is a blue with RGB values 48, 92, 163 and HSL 217°, 55%, 41%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#305CA3#305CA3
HEX#305CA3
RGBrgb(48, 92, 163)
RGB (0–1)0.1882, 0.3608, 0.6392
RGB percentages18.8%, 36.1%, 63.9%
HSLhsl(217, 54.5%, 41.4%)
HSV / HSBhsv(217, 70.6%, 63.9%)
CMYK70.6%, 43.6%, 0%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,169,443
CSS custom property--colour: #305CA3;

Brightness & contrast

Relative luminance0.10927WCAG 2.x, 0 is black and 1 is white
Perceived brightness93.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.59:1
Contrast with white6.59:1WCAG normal text: AA
Contrast with black3.19:1WCAG normal text: Fail
Greyscale equivalent#585858
Inverted#CFA35C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3A63A6no red cones; affects about 1% of men; ΔE 4 from the original
Deuteranopia#2658A2no green cones; the most common form, about 1% of men; ΔE 2.7 from the original
Tritanopia#006C77no blue cones; rare, and affects men and women equally; ΔE 42.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.59:1WCAG large text: AAA
Contrast with black, large text3.19:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 18.8Steel blue · ΔE 21.5Cornflower blue · ΔE 23.4Dodgerblue · ΔE 28.6Royal blue · ΔE 29.3Slate blue · ΔE 31.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.79, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A37730
Analogous#3096A3, #3D30A3
Triadic#A3305C, #5CA330
Split complementary#A33D30, #95A330
Tetradic#A33096, #A37730, #30A33D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B6C9E9
Lighter +30%#8EADDE
Lighter +20%#6790D2
Lighter +10%#3F73C7
Darker −10%#24467C
Darker −20%#193054
Darker −30%#0D192D
Darker −40%#020305
More saturated +25%#1656BD
Less saturated −25%#4A6289

Channel breakdown

R48
G92
B163
Red48 (18.8%)
Green92 (36.1%)
Blue163 (63.9%)
Hue217.04°
Saturation (HSL)54.5%
Lightness41.37%
Dominant channelBlue
Hex per channelR 30 · G 5C · B A3

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Every value on this page was computed from “305ca3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.