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Recognised as Colour

#278FD5

  • #278FD5
  • Blue
  • Dark
  • Nearest: Steel blue

#278FD5 is a blue with RGB values 39, 143, 213 and HSL 204°, 69%, 49%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#278FD5#278FD5
HEX#278FD5
RGBrgb(39, 143, 213)
RGB (0–1)0.1529, 0.5608, 0.8353
RGB percentages15.3%, 56.1%, 83.5%
HSLhsl(204.1, 69%, 49.4%)
HSV / HSBhsv(204.1, 81.7%, 83.5%)
CMYK81.7%, 32.9%, 0%, 16.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,592,725
CSS custom property--colour: #278FD5;

Brightness & contrast

Relative luminance0.2488WCAG 2.x, 0 is black and 1 is white
Perceived brightness132.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.98:1
Contrast with white3.51:1WCAG normal text: Fail
Contrast with black5.98:1WCAG normal text: AA
Greyscale equivalent#7E7E7E
Inverted#D8702A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6E91D8no red cones; affects about 1% of men; ΔE 12.8 from the original
Deuteranopia#5682D4no green cones; the most common form, about 1% of men; ΔE 14.6 from the original
Tritanopia#00A0A8no blue cones; rare, and affects men and women equally; ΔE 40.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.51:1WCAG large text: AA
Contrast with black, large text5.98:1WCAG large text: AAA

Named colours

Steel blue · ΔE 12.6Cornflower blue · ΔE 15.6Deep skyblue · ΔE 20.5Dodgerblue · ΔE 24.3Light skyblue · ΔE 28.2Light slate grey · ΔE 32.9
Nearest named CSS colourSteel blue (#4682B4)ΔE 12.58, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D56D27
Analogous#27D5C4, #2738D5
Triadic#D5278F, #8FD527
Split complementary#D52738, #D5C427
Tetradic#C427D5, #D56D27, #38D527

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D1E8F7
Lighter +30%#A6D2EF
Lighter +20%#7BBCE7
Lighter +10%#50A5DF
Darker −10%#1F72AA
Darker −20%#17557F
Darker −30%#0F3854
Darker −40%#071B29
More saturated +25%#0895F5
Less saturated −25%#4789B6

Channel breakdown

R39
G143
B213
Red39 (15.3%)
Green143 (56.1%)
Blue213 (83.5%)
Hue204.14°
Saturation (HSL)69.05%
Lightness49.41%
Dominant channelBlue
Hex per channelR 27 · G 8F · B D5

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Every value on this page was computed from “278fd5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.