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Recognised as Colour

#37559E

  • #37559E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#37559E is a blue with RGB values 55, 85, 158 and HSL 223°, 48%, 42%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#37559E#37559E
HEX#37559E
RGBrgb(55, 85, 158)
RGB (0–1)0.2157, 0.3333, 0.6196
RGB percentages21.6%, 33.3%, 62%
HSLhsl(222.5, 48.4%, 41.8%)
HSV / HSBhsv(222.5, 65.2%, 62%)
CMYK65.2%, 46.2%, 0%, 38%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,626,398
CSS custom property--colour: #37559E;

Brightness & contrast

Relative luminance0.09778WCAG 2.x, 0 is black and 1 is white
Perceived brightness89.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.11:1
Contrast with white7.11:1WCAG normal text: AAA
Contrast with black2.96:1WCAG normal text: Fail
Greyscale equivalent#545454
Inverted#C8AA61

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#325DA1no red cones; affects about 1% of men; ΔE 5.8 from the original
Deuteranopia#20549Cno green cones; the most common form, about 1% of men; ΔE 3.9 from the original
Tritanopia#006672no blue cones; rare, and affects men and women equally; ΔE 44.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.11:1WCAG large text: AAA
Contrast with black, large text2.96:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14.4Steel blue · ΔE 25.4Cornflower blue · ΔE 25.6Royal blue · ΔE 27.7Slate blue · ΔE 28.2Midnight blue · ΔE 29.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.42, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9E8037
Analogous#37889E, #4D379E
Triadic#9E3755, #559E37
Split complementary#9E4D37, #889E37
Tetradic#9E3788, #9E8037, #379E4D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BAC7E7
Lighter +30%#94A8DA
Lighter +20%#6E8ACD
Lighter +10%#496BBF
Darker −10%#2A4178
Darker −20%#1D2C52
Darker −30%#0F182D
Darker −40%#020407
More saturated +25%#1C4AB9
Less saturated −25%#526083

Channel breakdown

R55
G85
B158
Red55 (21.6%)
Green85 (33.3%)
Blue158 (62%)
Hue222.52°
Saturation (HSL)48.36%
Lightness41.76%
Dominant channelBlue
Hex per channelR 37 · G 55 · B 9E

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Every value on this page was computed from “37559e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.