#C13831
Closest named color: Dull Red (#BB3F3F). oklch(54.5% 0.175 27.5), rgb(193, 56, 49).
Aa
White text reads best on this color (5.41:1).
About this color
#C13831 is a medium-dark, vivid red. In OKLCH its lightness is 54%, its chroma 0.175 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.018 away. White text reads best on it, at 5.41:1.
| Hue family | Reds |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.87:1 |
| White text | 5.41:1 |
Values
| HEX | #C13831 |
| RGB | rgb(193, 56, 49) |
| HSL | hsl(3, 60%, 47%) |
| OKLCH | oklch(54.5% 0.175 27.5) |
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 #C13831 | 5.41:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #C13831 | 3.87:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #C13831 text on white | 5.41:1 | AA | Lc 75.8 | Fine for body text |
| #C13831 text on black | 3.87:1 | AA large text | Lc -25.9 | 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
#FDF3F2
oklch(97.2% 0.011 24.3)
-
Step 100
100
#F9E5E2
oklch(93.7% 0.022 27.8)
-
Step 200
200
#F5CFC9
oklch(88.5% 0.044 28.5)
-
Step 300
300
#EFAEA5
oklch(80.9% 0.078 27.8)
-
Step 400
400
#E48074
oklch(70.7% 0.126 27.9)
-
Step 500
500
#DA5B50
oklch(63.1% 0.162 27.6)
-
Step 600
600 (this color)
#C13831
oklch(54.5% 0.175 27.5)
-
Step 700
700
#AA2C27
oklch(49.1% 0.163 27.4)
-
Step 800
800
#8A2722
oklch(42.8% 0.135 27.3)
-
Step 900
900
#6F2620
oklch(37.7% 0.105 27.8)
-
Step 950
950
#411713
oklch(26.9% 0.066 27.8)
#C13831 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) | #60572F | 0.187 |
| Deuteranopia (no green cones) | #82752C | 0.171 |
| Tritanopia (no blue cones) | #D40038 | 0.054 |
| Achromatopsia (no color) | #6A6A6A | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C13831
#C13831
oklch(54.5% 0.175 27.5)
- #007F8C
#007F8C
oklch(54.5% 0.094 207.3)
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 #C13831, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.018
- Sinopia #BB3E03 ΔE 0.036
- Dusty Red #B9484E ΔE 0.037
- Brick Orange #C14A09 ΔE 0.048
- Firebrick #B22222 ΔE 0.048
- Cherry #CF0234 ΔE 0.048
- Rusty Red #AF2F0D ΔE 0.049
- Scarlet #BE0119 ΔE 0.050
Use #C13831 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.