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Recognised as Colour

#18170A

  • #18170A
  • Yellow
  • Dark
  • Nearest: Black

#18170A is a yellow with RGB values 24, 23, 10 and HSL 56°, 41%, 7%. It is a dark colour, so white text on it reaches 18:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#18170A#18170A
HEX#18170A
RGBrgb(24, 23, 10)
RGB (0–1)0.0941, 0.0902, 0.0392
RGB percentages9.4%, 9%, 3.9%
HSLhsl(55.7, 41.2%, 6.7%)
HSV / HSBhsv(55.7, 58.3%, 9.4%)
CMYK0%, 4.2%, 58.3%, 90.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,578,762
CSS custom property--colour: #18170A;

Brightness & contrast

Relative luminance0.00829WCAG 2.x, 0 is black and 1 is white
Perceived brightness22.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.01:1
Contrast with white18.01:1WCAG normal text: AAA
Contrast with black1.17:1WCAG normal text: Fail
Greyscale equivalent#161616
Inverted#E7E8F5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#191609no red cones; affects about 1% of men; ΔE 1.1 from the original
Deuteranopia#1A170Bno green cones; the most common form, about 1% of men; ΔE 1.2 from the original
Tritanopia#1A1514no blue cones; rare, and affects men and women equally; ΔE 7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.01:1WCAG large text: AAA
Contrast with black, large text1.17:1WCAG large text: Fail

Named colours

Black · ΔE 10.5Dark slate grey · ΔE 27.8Dim grey · ΔE 37.7Dark olivegreen · ΔE 45.2Gray · ΔE 46.7Slate grey · ΔE 48.7
Nearest named CSS colourBlack (#000000)ΔE 10.5, a distinctly different colour
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0A0B18
Analogous#18100A, #12180A
Triadic#0A1817, #170A18
Split complementary#0A1218, #100A18
Tetradic#0A1810, #0A0B18, #180A12

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A8A146
Lighter +30%#847F37
Lighter +20%#605C28
Lighter +10%#3C3A19
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1C1B06
Less saturated −25%#14130E

Channel breakdown

R24
G23
B10
Red24 (9.4%)
Green23 (9%)
Blue10 (3.9%)
Hue55.71°
Saturation (HSL)41.18%
Lightness6.67%
Dominant channelRed
Hex per channelR 18 · G 17 · B 0A

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Every value on this page was computed from “18170a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.