#C55D39
Closest named color: Terra Cotta (#C9643B). oklch(59.9% 0.142 39.3), rgb(197, 93, 57).
Aa
Black text reads best on this color (4.99:1).
About this color
#C55D39 is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.142 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Terra Cotta (#C9643B), ΔE 0.018 away. Black text reads best on it, at 4.99:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.142) |
| Temperature | warm |
| Nearest name | Terra Cotta (#C9643B) |
| Black text | 4.99:1 |
| White text | 4.20:1 |
Values
| HEX | #C55D39 |
| RGB | rgb(197, 93, 57) |
| HSL | hsl(15, 55%, 50%) |
| OKLCH | oklch(59.9% 0.142 39.3) |
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 #C55D39 | 4.20:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #C55D39 | 4.99:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #C55D39 text on white | 4.20:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #C55D39 text on black | 4.99:1 | 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
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F1D1C7
oklch(88.5% 0.039 38.1)
-
Step 300
300
#E9B29F
oklch(80.9% 0.07 39.9)
-
Step 400
400
#DC876B
oklch(70.6% 0.112 39)
-
Step 500
500 (this color)
#C55D39
oklch(59.9% 0.142 39.3)
-
Step 600
600
#BB4B21
oklch(55.6% 0.155 39.4)
-
Step 700
700
#A13B13
oklch(49.1% 0.144 39.2)
-
Step 800
800
#833214
oklch(42.8% 0.119 39.2)
-
Step 900
900
#692D18
oklch(37.7% 0.092 39.3)
-
Step 950
950
#3E1B0F
oklch(27% 0.059 39.4)
#C55D39 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) | #796D35 | 0.138 |
| Deuteranopia (no green cones) | #938437 | 0.125 |
| Tritanopia (no blue cones) | #D84855 | 0.067 |
| Achromatopsia (no color) | #7C7C7C | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55D39
#C55D39
oklch(59.9% 0.142 39.3)
- #008FAC
#008FAC
oklch(60.1% 0.109 218.9)
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 #C55D39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Terra Cotta #C9643B ΔE 0.018
- Terracotta #CA6641 ΔE 0.023
- Terracota #CB6843 ΔE 0.028
- Rusty Orange #CD5909 ΔE 0.030
- Rust Orange #C45508 ΔE 0.031
- Adobe #BD6C48 ΔE 0.033
- Clay #B66A50 ΔE 0.038
- Copper #B66325 ΔE 0.038
Use #C55D39 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.