Nerdulator> put something in

Recognised as Colour

#288BB8

  • #288BB8
  • Cyan
  • Dark
  • Nearest: Steel blue

#288BB8 is a cyan with RGB values 40, 139, 184 and HSL 199°, 64%, 44%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#288BB8#288BB8
HEX#288BB8
RGBrgb(40, 139, 184)
RGB (0–1)0.1569, 0.5451, 0.7216
RGB percentages15.7%, 54.5%, 72.2%
HSLhsl(198.8, 64.3%, 43.9%)
HSV / HSBhsv(198.8, 78.3%, 72.2%)
CMYK78.3%, 24.5%, 0%, 27.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,657,208
CSS custom property--colour: #288BB8;

Brightness & contrast

Relative luminance0.22377WCAG 2.x, 0 is black and 1 is white
Perceived brightness125.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.48:1
Contrast with white3.84:1WCAG normal text: Fail
Contrast with black5.48:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#D77447

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#758ABAno red cones; affects about 1% of men; ΔE 17.7 from the original
Deuteranopia#617CB7no green cones; the most common form, about 1% of men; ΔE 19.3 from the original
Tritanopia#00979Ano blue cones; rare, and affects men and women equally; ΔE 28 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.84:1WCAG large text: AA
Contrast with black, large text5.48:1WCAG large text: AAA

Named colours

Steel blue · ΔE 8.6Deep skyblue · ΔE 21.9Light slate grey · ΔE 22.9Slate grey · ΔE 23.4Light skyblue · ΔE 25.5Cadetblue · ΔE 26
Nearest named CSS colourSteel blue (#4682B4)ΔE 8.62, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B85528
Analogous#28B89D, #2843B8
Triadic#B8288B, #8BB828
Split complementary#B82843, #B89D28
Tetradic#9D28B8, #B85528, #43B828

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BCE0F0
Lighter +30%#92CDE7
Lighter +20%#68B9DE
Lighter +10%#3EA6D5
Darker −10%#1F6B8E
Darker −20%#164C64
Darker −30%#0D2C3A
Darker −40%#040C10
More saturated +25%#0C95D4
Less saturated −25%#44819C

Channel breakdown

R40
G139
B184
Red40 (15.7%)
Green139 (54.5%)
Blue184 (72.2%)
Hue198.75°
Saturation (HSL)64.29%
Lightness43.92%
Dominant channelBlue
Hex per channelR 28 · G 8B · B B8

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 “288bb8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.