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Colour

#6388AA

  • #6388AA
  • Blue
  • Dark
  • Nearest: Steel blue

#6388AA is a blue with RGB values 99, 136, 170 and HSL 209°, 29%, 53%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#6388AA#6388AA
HEX#6388AA
RGBrgb(99, 136, 170)
RGB (0–1)0.3882, 0.5333, 0.6667
RGB percentages38.8%, 53.3%, 66.7%
HSLhsl(208.7, 29.5%, 52.7%)
HSV / HSBhsv(208.7, 41.8%, 66.7%)
CMYK41.8%, 20%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,523,050
CSS custom property--colour: #6388AA;

Brightness & contrast

Relative luminance0.23163WCAG 2.x, 0 is black and 1 is white
Perceived brightness130.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.63:1
Contrast with white3.73:1WCAG normal text: Fail
Contrast with black5.63:1WCAG normal text: AA
Greyscale equivalent#838383
Inverted#9C7755

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7A88ACno red cones; affects about 1% of men; ΔE 7.5 from the original
Deuteranopia#7181A9no green cones; the most common form, about 1% of men; ΔE 7.9 from the original
Tritanopia#499093no blue cones; rare, and affects men and women equally; ΔE 22.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.73:1WCAG large text: AA
Contrast with black, large text5.63:1WCAG large text: AAA

Named colours

Steel blue · ΔE 10.5Light slate grey · ΔE 11.1Slate grey · ΔE 11.8Cadetblue · ΔE 22.4Gray · ΔE 22.4Light steelblue · ΔE 24.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 10.53, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AA8563
Analogous#63AAA9, #6364AA
Triadic#AA6388, #88AA63
Split complementary#AA6364, #AAA963
Tetradic#A963AA, #AA8563, #65AA63

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E7EDF2
Lighter +30%#C6D4E0
Lighter +20%#A5BACE
Lighter +10%#84A1BC
Darker −10%#4D6E8D
Darker −20%#3B556C
Darker −30%#293B4B
Darker −40%#17212A
More saturated +25%#4589C8
Less saturated −25%#81878C

Channel breakdown

R99
G136
B170
Red99 (38.8%)
Green136 (53.3%)
Blue170 (66.7%)
Hue208.73°
Saturation (HSL)29.46%
Lightness52.75%
Dominant channelBlue
Hex per channelR 63 · G 88 · B AA

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Every value on this page was computed from “6388aa” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.