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Recognised as Colour

#30477A

  • #30477A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#30477A is a blue with RGB values 48, 71, 122 and HSL 221°, 44%, 33%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#30477A#30477A
HEX#30477A
RGBrgb(48, 71, 122)
RGB (0–1)0.1882, 0.2784, 0.4784
RGB percentages18.8%, 27.8%, 47.8%
HSLhsl(221.4, 43.5%, 33.3%)
HSV / HSBhsv(221.4, 60.7%, 47.8%)
CMYK60.7%, 41.8%, 0%, 52.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,164,026
CSS custom property--colour: #30477A;

Brightness & contrast

Relative luminance0.0654WCAG 2.x, 0 is black and 1 is white
Perceived brightness73.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.1:1
Contrast with white9.1:1WCAG normal text: AAA
Contrast with black2.31:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#CFB885

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#314C7Cno red cones; affects about 1% of men; ΔE 3.3 from the original
Deuteranopia#274579no green cones; the most common form, about 1% of men; ΔE 1.9 from the original
Tritanopia#00525Ano blue cones; rare, and affects men and women equally; ΔE 33.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.1:1WCAG large text: AAA
Contrast with black, large text2.31:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 20.8Steel blue · ΔE 24.9Slate grey · ΔE 32.3Midnight blue · ΔE 33.2Light slate grey · ΔE 34.1Dark slate grey · ΔE 34.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 20.8, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7A6330
Analogous#306C7A, #3E307A
Triadic#7A3047, #477A30
Split complementary#7A3E30, #6C7A30
Tetradic#7A306C, #7A6330, #307A3E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9DB0D9
Lighter +30%#7992CA
Lighter +20%#5474BC
Lighter +10%#3E5C9F
Darker −10%#223255
Darker −20%#131C31
Darker −30%#05070C
Darker −40%#000000
More saturated +25%#1B3F8F
Less saturated −25%#454F65

Channel breakdown

R48
G71
B122
Red48 (18.8%)
Green71 (27.8%)
Blue122 (47.8%)
Hue221.35°
Saturation (HSL)43.53%
Lightness33.33%
Dominant channelBlue
Hex per channelR 30 · G 47 · B 7A

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Every value on this page was computed from “30477a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.