#C55B42
Closest named color: Terra Cotta (#C9643B). oklch(59.8% 0.142 34.6), rgb(197, 91, 66).
Aa
Black text reads best on this color (4.94:1).
About this color
#C55B42 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.142 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Terra Cotta (#C9643B), ΔE 0.026 away. Black text reads best on it, at 4.94:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.142) |
| Temperature | warm |
| Nearest name | Terra Cotta (#C9643B) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #C55B42 |
| RGB | rgb(197, 91, 66) |
| HSL | hsl(11, 53%, 52%) |
| OKLCH | oklch(59.8% 0.142 34.6) |
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 #C55B42 | 4.24:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #C55B42 | 4.94:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #C55B42 text on white | 4.24:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #C55B42 text on black | 4.94:1 | AA | Lc -32.9 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F7E5E1
oklch(93.5% 0.021 32.5)
-
Step 200
200
#F1D1C8
oklch(88.5% 0.038 36.2)
-
Step 300
300
#EAB1A3
oklch(80.9% 0.07 34.2)
-
Step 400
400
#DC8671
oklch(70.6% 0.111 34.5)
-
Step 500
500 (this color)
#C55B42
oklch(59.8% 0.142 34.6)
-
Step 600
600
#BC492E
oklch(55.6% 0.154 34.6)
-
Step 700
700
#A23A21
oklch(49.2% 0.143 34.7)
-
Step 800
800
#83311D
oklch(42.7% 0.118 34.9)
-
Step 900
900
#6A2C1D
oklch(37.7% 0.093 34.9)
-
Step 950
950
#3E1A12
oklch(26.9% 0.059 33.8)
#C55B42 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) | #776D3F | 0.142 |
| Deuteranopia (no green cones) | #918440 | 0.131 |
| Tritanopia (no blue cones) | #D84655 | 0.060 |
| Achromatopsia (no color) | #7B7B7B | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55B42
#C55B42
oklch(59.8% 0.142 34.6)
- #008FA6
#008FA6
oklch(59.8% 0.105 214.3)
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 #C55B42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Terra Cotta #C9643B ΔE 0.026
- Terracotta #CA6641 ΔE 0.028
- Dark Coral #CF524E ΔE 0.031
- Terracota #CB6843 ΔE 0.033
- Indian Red #CD5C5C ΔE 0.036
- Adobe #BD6C48 ΔE 0.038
- Clay #B66A50 ΔE 0.039
- Rust Orange #C45508 ΔE 0.039
Use #C55B42 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.