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Recognised as Colour

#637EBE

  • #637EBE
  • Blue
  • Dark
  • Nearest: Steel blue

#637EBE is a blue with RGB values 99, 126, 190 and HSL 222°, 41%, 57%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#637EBE#637EBE
HEX#637EBE
RGBrgb(99, 126, 190)
RGB (0–1)0.3882, 0.4941, 0.7451
RGB percentages38.8%, 49.4%, 74.5%
HSLhsl(222.2, 41.2%, 56.7%)
HSV / HSBhsv(222.2, 47.9%, 74.5%)
CMYK47.9%, 33.7%, 0%, 25.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,520,510
CSS custom property--colour: #637EBE;

Brightness & contrast

Relative luminance0.21292WCAG 2.x, 0 is black and 1 is white
Perceived brightness127.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.26:1
Contrast with white3.99:1WCAG normal text: Fail
Contrast with black5.26:1WCAG normal text: AA
Greyscale equivalent#7D7D7D
Inverted#9C8141

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6684C1no red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#5C7BBDno green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#3E8C95no blue cones; rare, and affects men and women equally; ΔE 38 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.99:1WCAG large text: AA
Contrast with black, large text5.26:1WCAG large text: AAA

Named colours

Steel blue · ΔE 12.8Cornflower blue · ΔE 15.5Light slate grey · ΔE 27.6Dodgerblue · ΔE 27.6Slate grey · ΔE 27.9Dark slateblue · ΔE 29.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 12.83, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BEA363
Analogous#63ABBE, #7663BE
Triadic#BE637E, #7EBE63
Split complementary#BE7663, #ABBE63
Tetradic#BE63AB, #BEA363, #63BE76

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F3F5FA
Lighter +30%#CFD7EB
Lighter +20%#ABBADC
Lighter +10%#879CCD
Darker −10%#4663A8
Darker −20%#374E84
Darker −30%#283960
Darker −40%#19233C
More saturated +25%#4773DA
Less saturated −25%#7F89A2

Channel breakdown

R99
G126
B190
Red99 (38.8%)
Green126 (49.4%)
Blue190 (74.5%)
Hue222.2°
Saturation (HSL)41.18%
Lightness56.67%
Dominant channelBlue
Hex per channelR 63 · G 7E · B BE

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Every value on this page was computed from “637ebe” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.