#C13621
Closest named color: Sinopia (#BB3E03). oklch(54.1% 0.179 31.6), rgb(193, 54, 33).
Aa
White text reads best on this color (5.50:1).
About this color
#C13621 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.179 and its hue 32°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.025 away. White text reads best on it, at 5.50:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.179) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.81:1 |
| White text | 5.50:1 |
Values
| HEX | #C13621 |
| RGB | rgb(193, 54, 33) |
| HSL | hsl(8, 71%, 44%) |
| OKLCH | oklch(54.1% 0.179 31.6) |
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 #C13621 | 5.50:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #C13621 | 3.81:1 | AA large text | Lc 27.9 | Dividers and decoration only |
| #C13621 text on white | 5.50:1 | AA | Lc 76.2 | Fine for body text |
| #C13621 text on black | 3.81:1 | AA large text | Lc -25.6 | 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
#F9E5E0
oklch(93.7% 0.023 34.3)
-
Step 200
200
#F5CFC7
oklch(88.5% 0.044 31.9)
-
Step 300
300
#F0AEA1
oklch(80.9% 0.08 31.4)
-
Step 400
400
#E5806D
oklch(70.6% 0.129 31.7)
-
Step 500
500
#DB5B46
oklch(63.1% 0.165 31.4)
-
Step 600
600 (this color)
#C13621
oklch(54.1% 0.179 31.6)
-
Step 700
700
#AB2C19
oklch(49.2% 0.167 31.5)
-
Step 800
800
#8B2717
oklch(42.8% 0.138 31.8)
-
Step 900
900
#70261A
oklch(37.8% 0.108 31.6)
-
Step 950
950
#421710
oklch(27% 0.069 31.3)
#C13621 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) | #60551D | 0.189 |
| Deuteranopia (no green cones) | #827419 | 0.172 |
| Tritanopia (no blue cones) | #D50033 | 0.057 |
| Achromatopsia (no color) | #696969 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C13621
#C13621
oklch(54.1% 0.179 31.6)
- #007D8E
#007D8E
oklch(54.1% 0.094 211.3)
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 #C13621, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.025
- Dull Red #BB3F3F ΔE 0.029
- Brick Orange #C14A09 ΔE 0.041
- Rusty Red #AF2F0D ΔE 0.042
- Firebrick #B22222 ΔE 0.047
- Scarlet #BE0119 ΔE 0.048
- Dusty Red #B9484E ΔE 0.048
- Burnt Orange #C04E01 ΔE 0.050
Use #C13621 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.