Crimson
#B10B21 · Crimson
#B10B21 is Crimson, a warm red color. It has an RGB value of 177, 11, 33 and a relative luminance of 0.097, making it a dark surface.
Temperature
☀ Warm
Hue family
red
Luminance
0.10
Conversions
HEX
RGB
HSL
HSV
CMYK
OKLCHPro
Contrast & accessibility
On white
The quick fox
7.14:1
AA normal✓
AA large✓
AAA normal✓
On black
The quick fox
2.94:1
AA normal✕
AA large✕
AAA normal✕
Color harmonies
Complementary
Split-complementary
Shades & tints
Similar named colors
Frequently asked
What is the color #B10B21?
#B10B21 is Crimson, a warm red color. In RGB it is 177, 11, 33, and in HSL it is 352°, 88%, 37%.
Is #B10B21 a light or dark color?
#B10B21 has a relative luminance of 0.097, so it reads as a dark surface. Use light text on top of it for the best contrast.
What colors go well with #B10B21?
Its complementary color is #0BB19B. For softer combinations, try the analogous or split-complementary harmonies shown above.