#C55D3F
Closest named color: Terra Cotta (#C9643B). oklch(60% 0.141 36.9), rgb(197, 93, 63).
Aa
Black text reads best on this color (5.01:1).
About this color
#C55D3F is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.141 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Terra Cotta (#C9643B), ΔE 0.020 away. Black text reads best on it, at 5.01:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.141) |
| Temperature | warm |
| Nearest name | Terra Cotta (#C9643B) |
| Black text | 5.01:1 |
| White text | 4.19:1 |
Values
| HEX | #C55D3F |
| RGB | rgb(197, 93, 63) |
| HSL | hsl(13, 54%, 51%) |
| OKLCH | oklch(60% 0.141 36.9) |
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 #C55D3F | 4.19:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #C55D3F | 5.01:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #C55D3F text on white | 4.19:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #C55D3F text on black | 5.01:1 | AA | Lc -33.3 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#FBF3F1
oklch(97% 0.009 34.3)
-
Step 100
100
#F7E6E1
oklch(93.7% 0.02 37)
-
Step 200
200
#F1D1C8
oklch(88.5% 0.038 36.2)
-
Step 300
300
#E9B2A2
oklch(81% 0.068 36.8)
-
Step 400
400
#DC876F
oklch(70.7% 0.111 36.6)
-
Step 500
500 (this color)
#C55D3F
oklch(60% 0.141 36.9)
-
Step 600
600
#BB4B29
oklch(55.7% 0.153 37.2)
-
Step 700
700
#A13B1C
oklch(49.2% 0.142 36.9)
-
Step 800
800
#83321A
oklch(42.8% 0.118 36.9)
-
Step 900
900
#692D1B
oklch(37.7% 0.091 37.4)
-
Step 950
950
#3E1B11
oklch(27% 0.058 36.8)
#C55D3F 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) | #796E3C | 0.138 |
| Deuteranopia (no green cones) | #92843D | 0.127 |
| Tritanopia (no blue cones) | #D84856 | 0.064 |
| Achromatopsia (no color) | #7C7C7C | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55D3F
#C55D3F
oklch(60% 0.141 36.9)
- #008FAA
#008FAA
oklch(60% 0.107 217.4)
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 #C55D3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Terra Cotta #C9643B ΔE 0.020
- Terracotta #CA6641 ΔE 0.023
- Terracota #CB6843 ΔE 0.028
- Adobe #BD6C48 ΔE 0.033
- Rusty Orange #CD5909 ΔE 0.035
- Rust Orange #C45508 ΔE 0.036
- Clay #B66A50 ΔE 0.036
- Dark Coral #CF524E ΔE 0.037
Use #C55D3F 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.