Colour
#1B0909
- #1B0909
- Red
- Dark
- Nearest: Black
#1B0909 is a red with RGB values 27, 9, 9 and HSL 0°, 50%, 7%. It is a dark colour, so white text on it reaches 19.3:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#1B0909#1B0909
HEX#1B0909
RGBrgb(27, 9, 9)
RGB (0–1)0.1059, 0.0353, 0.0353
RGB percentages10.6%, 3.5%, 3.5%
HSLhsl(0, 50%, 7.1%)
HSV / HSBhsv(0, 66.7%, 10.6%)
CMYK0%, 66.7%, 66.7%, 89.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,771,785
CSS custom property--colour: #1B0909;
Brightness & contrast
Relative luminance0.00448WCAG 2.x, 0 is black and 1 is white
Perceived brightness16.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.27:1
Contrast with white19.27:1WCAG normal text: AAA
Contrast with black1.09:1WCAG normal text: Fail
Greyscale equivalent#0D0D0D
Inverted#E4F6F6
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.27:1WCAG large text: AAA
Contrast with black, large text1.09:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#091B1B
Analogous#1B0912, #1B1209
Triadic#091B09, #09091B
Split complementary#091B12, #09121B
Tetradic#121B09, #091B1B, #12091B
Tints, shades & saturation
Channel breakdown
R27
G9
B9
Red27 (10.6%)
Green9 (3.5%)
Blue9 (3.5%)
Hue0°
Saturation (HSL)50%
Lightness7.06%
Dominant channelRed
Hex per channelR 1B · G 09 · B 09
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