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Recognised as Colour

#6398BB

  • #6398BB
  • Blue
  • Dark
  • Nearest: Steel blue

#6398BB is a blue with RGB values 99, 152, 187 and HSL 204°, 39%, 56%. It is a dark colour, so black text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#6398BB#6398BB
HEX#6398BB
RGBrgb(99, 152, 187)
RGB (0–1)0.3882, 0.5961, 0.7333
RGB percentages38.8%, 59.6%, 73.3%
HSLhsl(203.9, 39.3%, 56.1%)
HSV / HSBhsv(203.9, 47.1%, 73.3%)
CMYK47.1%, 18.7%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,527,163
CSS custom property--colour: #6398BB;

Brightness & contrast

Relative luminance0.28697WCAG 2.x, 0 is black and 1 is white
Perceived brightness143.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.74:1
Contrast with white3.12:1WCAG normal text: Fail
Contrast with black6.74:1WCAG normal text: AA
Greyscale equivalent#8F8F8F
Inverted#9C6744

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#8897BDno red cones; affects about 1% of men; ΔE 11.8 from the original
Deuteranopia#7C8EBAno green cones; the most common form, about 1% of men; ΔE 12.3 from the original
Tritanopia#3BA1A3no blue cones; rare, and affects men and women equally; ΔE 24.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.12:1WCAG large text: AA
Contrast with black, large text6.74:1WCAG large text: AAA

Named colours

Steel blue · ΔE 12.4Light slate grey · ΔE 14.5Slate grey · ΔE 16.2Cadetblue · ΔE 20Light skyblue · ΔE 20Sky blue · ΔE 20
Nearest named CSS colourSteel blue (#4682B4)ΔE 12.39, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB8663
Analogous#63BBB2, #636CBB
Triadic#BB6398, #98BB63
Split complementary#BB636C, #BBB263
Tetradic#B263BB, #BB8663, #6CBB63

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F1F6F9
Lighter +30%#CEDEE9
Lighter +20%#AAC7DA
Lighter +10%#87AFCA
Darker −10%#477FA4
Darker −20%#386380
Darker −30%#28485D
Darker −40%#192C39
More saturated +25%#479ED7
Less saturated −25%#7F929F

Channel breakdown

R99
G152
B187
Red99 (38.8%)
Green152 (59.6%)
Blue187 (73.3%)
Hue203.86°
Saturation (HSL)39.29%
Lightness56.08%
Dominant channelBlue
Hex per channelR 63 · G 98 · B BB

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Every value on this page was computed from “6398bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.