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Recognised as Colour

#0A3459

  • #0A3459
  • Blue
  • Dark
  • Nearest: Dark slate grey

#0A3459 is a blue with RGB values 10, 52, 89 and HSL 208°, 80%, 19%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#0A3459#0A3459
HEX#0A3459
RGBrgb(10, 52, 89)
RGB (0–1)0.0392, 0.2039, 0.349
RGB percentages3.9%, 20.4%, 34.9%
HSLhsl(208.1, 79.8%, 19.4%)
HSV / HSBhsv(208.1, 88.8%, 34.9%)
CMYK88.8%, 41.6%, 0%, 65.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer668,761
CSS custom property--colour: #0A3459;

Brightness & contrast

Relative luminance0.03242WCAG 2.x, 0 is black and 1 is white
Perceived brightness50.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.74:1
Contrast with white12.74:1WCAG normal text: AAA
Contrast with black1.65:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#F5CBA6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#22365Bno red cones; affects about 1% of men; ΔE 4.3 from the original
Deuteranopia#162F58no green cones; the most common form, about 1% of men; ΔE 5.2 from the original
Tritanopia#003D42no blue cones; rare, and affects men and women equally; ΔE 24.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.74:1WCAG large text: AAA
Contrast with black, large text1.65:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 27.9Dark slateblue · ΔE 31Steel blue · ΔE 32.5Black · ΔE 33.6Dim grey · ΔE 35.2Slate grey · ΔE 35.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 27.91, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#592F0A
Analogous#0A5957, #0A0C59
Triadic#590A34, #34590A
Split complementary#590A0C, #59560A
Tetradic#570A59, #592F0A, #0D590A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#459DEA
Lighter +30%#1984E3
Lighter +20%#146AB5
Lighter +10%#0F4F87
Darker −10%#05192B
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003563
Less saturated −25%#16334D

Channel breakdown

R10
G52
B89
Red10 (3.9%)
Green52 (20.4%)
Blue89 (34.9%)
Hue208.1°
Saturation (HSL)79.8%
Lightness19.41%
Dominant channelBlue
Hex per channelR 0A · G 34 · B 59

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Every value on this page was computed from “0a3459” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.