#C13D0A
Closest named color: Sinopia (#BB3E03). oklch(54.7% 0.176 37.4), rgb(193, 61, 10).
Aa
White text reads best on this color (5.33:1).
About this color
#C13D0A is a medium-dark, vivid red. In OKLCH its lightness is 55%, its chroma 0.176 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Sinopia (#BB3E03), ΔE 0.012 away. White text reads best on it, at 5.33:1.
| Hue family | Reds |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.176) |
| Temperature | warm |
| Nearest name | Sinopia (#BB3E03) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #C13D0A |
| RGB | rgb(193, 61, 10) |
| HSL | hsl(17, 90%, 40%) |
| OKLCH | oklch(54.7% 0.176 37.4) |
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 #C13D0A | 5.33:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #C13D0A | 3.93:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #C13D0A text on white | 5.33:1 | AA | Lc 75.3 | Fine for body text |
| #C13D0A text on black | 3.93:1 | AA large text | Lc -26.4 | 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
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F9E5DF
oklch(93.6% 0.023 37.4)
-
Step 200
200
#F4D0C5
oklch(88.5% 0.043 37.7)
-
Step 300
300
#EFAF9C
oklch(80.9% 0.08 37.2)
-
Step 400
400
#E38265
oklch(70.6% 0.127 37.4)
-
Step 500
500
#D95F39
oklch(63.2% 0.162 37.7)
-
Step 600
600 (this color)
#C13D0A
oklch(54.7% 0.176 37.4)
-
Step 700
700
#A83100
oklch(49% 0.162 37.4)
-
Step 800
800
#892A07
oklch(42.7% 0.136 37.5)
-
Step 900
900
#6E2812
oklch(37.7% 0.105 37.4)
-
Step 950
950
#41180C
oklch(26.9% 0.067 37)
#C13D0A 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) | #655800 | 0.179 |
| Deuteranopia (no green cones) | #857600 | 0.162 |
| Tritanopia (no blue cones) | #D50735 | 0.072 |
| Achromatopsia (no color) | #6B6B6B | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C13D0A
#C13D0A
oklch(54.7% 0.176 37.4)
- #007E96
#007E96
oklch(54.7% 0.098 217.3)
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 #C13D0A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sinopia #BB3E03 ΔE 0.012
- Brick Orange #C14A09 ΔE 0.024
- Burnt Orange #C04E01 ΔE 0.032
- Burnt Siena #B75203 ΔE 0.042
- Dull Red #BB3F3F ΔE 0.042
- Rust Orange #C45508 ΔE 0.047
- Rusty Red #AF2F0D ΔE 0.048
- Cinnamon #AC4F06 ΔE 0.049
Use #C13D0A 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.