Nerdulator> put something in

Recognised as Colour

#647CB0

  • #647CB0
  • Blue
  • Dark
  • Nearest: Steel blue

#647CB0 is a blue with RGB values 100, 124, 176 and HSL 221°, 32%, 54%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#647CB0#647CB0
HEX#647CB0
RGBrgb(100, 124, 176)
RGB (0–1)0.3922, 0.4863, 0.6902
RGB percentages39.2%, 48.6%, 69%
HSLhsl(221.1, 32.5%, 54.1%)
HSV / HSBhsv(221.1, 43.2%, 69%)
CMYK43.2%, 29.5%, 0%, 31%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,585,520
CSS custom property--colour: #647CB0;

Brightness & contrast

Relative luminance0.20259WCAG 2.x, 0 is black and 1 is white
Perceived brightness124.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.05:1
Contrast with white4.16:1WCAG normal text: Fail
Contrast with black5.05:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#9B834F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6980B2no red cones; affects about 1% of men; ΔE 2 from the original
Deuteranopia#6279AFno green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#49878Eno blue cones; rare, and affects men and women equally; ΔE 30.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.16:1WCAG large text: AA
Contrast with black, large text5.05:1WCAG large text: AAA

Named colours

Steel blue · ΔE 9.5Light slate grey · ΔE 20.9Slate grey · ΔE 21.1Cornflower blue · ΔE 21.8Gray · ΔE 30.8Light steelblue · ΔE 31
Nearest named CSS colourSteel blue (#4682B4)ΔE 9.48, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B09864
Analogous#64A2B0, #7264B0
Triadic#B0647C, #7CB064
Split complementary#B07264, #A2B064
Tetradic#B064A2, #B09864, #64B072

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBEEF5
Lighter +30%#C9D2E4
Lighter +20%#A8B5D2
Lighter +10%#8699C1
Darker −10%#4C6395
Darker −20%#3B4D73
Darker −30%#2A3651
Darker −40%#182030
More saturated +25%#4771CD
Less saturated −25%#818793

Channel breakdown

R100
G124
B176
Red100 (39.2%)
Green124 (48.6%)
Blue176 (69%)
Hue221.05°
Saturation (HSL)32.48%
Lightness54.12%
Dominant channelBlue
Hex per channelR 64 · G 7C · B B0

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “647cb0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.