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Colour

#377B9F

  • #377B9F
  • Blue
  • Dark
  • Nearest: Steel blue

#377B9F is a blue with RGB values 55, 123, 159 and HSL 201°, 49%, 42%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#377B9F#377B9F
HEX#377B9F
RGBrgb(55, 123, 159)
RGB (0–1)0.2157, 0.4824, 0.6235
RGB percentages21.6%, 48.2%, 62.4%
HSLhsl(200.8, 48.6%, 42%)
HSV / HSBhsv(200.8, 65.4%, 62.4%)
CMYK65.4%, 22.6%, 0%, 37.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,636,127
CSS custom property--colour: #377B9F;

Brightness & contrast

Relative luminance0.17481WCAG 2.x, 0 is black and 1 is white
Perceived brightness112.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.67:1
Contrast with white4.67:1WCAG normal text: AA
Contrast with black4.5:1WCAG normal text: Fail
Greyscale equivalent#6F6F6F
Inverted#C88460

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6A7AA1no red cones; affects about 1% of men; ΔE 14.2 from the original
Deuteranopia#5B6F9Eno green cones; the most common form, about 1% of men; ΔE 15.4 from the original
Tritanopia#008487no blue cones; rare, and affects men and women equally; ΔE 24.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.67:1WCAG large text: AAA
Contrast with black, large text4.5:1WCAG large text: AA

Named colours

Steel blue · ΔE 9.4Slate grey · ΔE 17.4Light slate grey · ΔE 17.9Cadetblue · ΔE 24.1Teal · ΔE 25.6Dark cyan · ΔE 26.8
Nearest named CSS colourSteel blue (#4682B4)ΔE 9.44, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9F5B37
Analogous#379F8F, #37479F
Triadic#9F377B, #7B9F37
Split complementary#9F3747, #9F8F37
Tetradic#8F379F, #9F5B37, #479F37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BBD8E7
Lighter +30%#95C2DA
Lighter +20%#6FADCD
Lighter +10%#4997C0
Darker −10%#2A5E79
Darker −20%#1D4053
Darker −30%#10232D
Darker −40%#030607
More saturated +25%#1C83BA
Less saturated −25%#527384

Channel breakdown

R55
G123
B159
Red55 (21.6%)
Green123 (48.2%)
Blue159 (62.4%)
Hue200.77°
Saturation (HSL)48.6%
Lightness41.96%
Dominant channelBlue
Hex per channelR 37 · G 7B · B 9F

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Every value on this page was computed from “377b9f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.