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Recognised as Colour

#0A438D

  • #0A438D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#0A438D is a blue with RGB values 10, 67, 141 and HSL 214°, 87%, 30%. It is a dark colour, so white text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#0A438D#0A438D
HEX#0A438D
RGBrgb(10, 67, 141)
RGB (0–1)0.0392, 0.2627, 0.5529
RGB percentages3.9%, 26.3%, 55.3%
HSLhsl(213.9, 86.8%, 29.6%)
HSV / HSBhsv(213.9, 92.9%, 55.3%)
CMYK92.9%, 52.5%, 0%, 44.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer672,653
CSS custom property--colour: #0A438D;

Brightness & contrast

Relative luminance0.06002WCAG 2.x, 0 is black and 1 is white
Perceived brightness70.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.54:1
Contrast with white9.54:1WCAG normal text: AAA
Contrast with black2.2:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#F5BC72

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0F4B90no red cones; affects about 1% of men; ΔE 5.4 from the original
Deuteranopia#00408Cno green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#005561no blue cones; rare, and affects men and women equally; ΔE 44.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.54:1WCAG large text: AAA
Contrast with black, large text2.2:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.4Midnight blue · ΔE 23.3Royal blue · ΔE 29.8Rebecca purple · ΔE 29.9Slate blue · ΔE 30.3Steel blue · ΔE 31.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.43, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8D540A
Analogous#0A858D, #120A8D
Triadic#8D0A43, #438D0A
Split complementary#8D120A, #858D0A
Tetradic#8D0A85, #8D540A, #0A8D12

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6EA9F5
Lighter +30%#3F8CF1
Lighter +20%#1170EC
Lighter +10%#0D5ABD
Darker −10%#072C5D
Darker −20%#03162E
Darker −30%#000000
Darker −40%#000000
More saturated +25%#004297
Less saturated −25%#1D457A

Channel breakdown

R10
G67
B141
Red10 (3.9%)
Green67 (26.3%)
Blue141 (55.3%)
Hue213.89°
Saturation (HSL)86.75%
Lightness29.61%
Dominant channelBlue
Hex per channelR 0A · G 43 · B 8D

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Every value on this page was computed from “0a438d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.