#C13121
Closest named color: Sinopia (#BB3E03). oklch(53.6% 0.183 30.3), rgb(193, 49, 33).
Aa
White text reads best on this color (5.63:1).
About this color
#C13121 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.183 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.030 away. White text reads best on it, at 5.63:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.183) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.72:1 |
| White text | 5.63:1 |
Values
| HEX | #C13121 |
| RGB | rgb(193, 49, 33) |
| HSL | hsl(6, 71%, 44%) |
| OKLCH | oklch(53.6% 0.183 30.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #C13121 | 5.63:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #C13121 | 3.72:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #C13121 text on white | 5.63:1 | AA | Lc 76.7 | Fine for body text |
| #C13121 text on black | 3.72:1 | AA large text | Lc -25.0 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#F9E4E0
oklch(93.5% 0.024 30.5)
-
Step 200
200
#F6CFC7
oklch(88.6% 0.046 31.6)
-
Step 300
300
#F1ADA1
oklch(80.9% 0.082 30.2)
-
Step 400
400
#E77F6E
oklch(70.8% 0.132 30.4)
-
Step 500
500
#DD5947
oklch(63.2% 0.169 30.2)
-
Step 600
600 (this color)
#C13121
oklch(53.6% 0.183 30.3)
-
Step 700
700
#AC291A
oklch(49.1% 0.17 30.5)
-
Step 800
800
#8C2418
oklch(42.7% 0.141 30.3)
-
Step 900
900
#71241A
oklch(37.7% 0.111 30.3)
-
Step 950
950
#421610
oklch(26.9% 0.07 30.1)
#C13121 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #5D531D | 0.196 |
| Deuteranopia (no green cones) | #817319 | 0.177 |
| Tritanopia (no blue cones) | #D5002F | 0.051 |
| Achromatopsia (no color) | #676767 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C13121
#C13121
oklch(53.6% 0.183 30.3)
- #007C8B
#007C8B
oklch(53.7% 0.093 209.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #C13121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.030
- Dull Red #BB3F3F ΔE 0.031
- Rusty Red #AF2F0D ΔE 0.040
- Scarlet #BE0119 ΔE 0.041
- Firebrick #B22222 ΔE 0.041
- Lipstick Red #C0022F ΔE 0.047
- Brick Orange #C14A09 ΔE 0.048
- Cherry #CF0234 ΔE 0.048
Use #C13121 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.