#C55A35
Closest named color: Terra Cotta (#C9643B). oklch(59.5% 0.146 39.1), rgb(197, 90, 53).
Aa
Black text reads best on this color (4.88:1).
About this color
#C55A35 is a medium-dark, vivid red. In OKLCH its lightness is 59%, its chroma 0.146 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Terra Cotta (#C9643B), ΔE 0.024 away. Black text reads best on it, at 4.88:1.
| Hue family | Reds |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.146) |
| Temperature | warm |
| Nearest name | Terra Cotta (#C9643B) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #C55A35 |
| RGB | rgb(197, 90, 53) |
| HSL | hsl(15, 58%, 49%) |
| OKLCH | oklch(59.5% 0.146 39.1) |
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 #C55A35 | 4.29:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #C55A35 | 4.88:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #C55A35 text on white | 4.29:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #C55A35 text on black | 4.88:1 | AA | Lc -32.6 | 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
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F2D1C6
oklch(88.5% 0.04 39.3)
-
Step 300
300
#EAB19F
oklch(80.8% 0.072 38.2)
-
Step 400
400
#DD876A
oklch(70.7% 0.114 39.4)
-
Step 500
500 (this color)
#C55A35
oklch(59.5% 0.146 39.1)
-
Step 600
600
#BD491D
oklch(55.6% 0.159 39.2)
-
Step 700
700
#A3390F
oklch(49.1% 0.149 38.9)
-
Step 800
800
#843011
oklch(42.6% 0.123 38.9)
-
Step 900
900
#6A2C16
oklch(37.6% 0.095 39.4)
-
Step 950
950
#3F1A0E
oklch(27% 0.062 38.5)
#C55A35 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) | #776B31 | 0.143 |
| Deuteranopia (no green cones) | #918332 | 0.131 |
| Tritanopia (no blue cones) | #D84352 | 0.069 |
| Achromatopsia (no color) | #7A7A7A | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55A35
#C55A35
oklch(59.5% 0.146 39.1)
- #008DAA
#008DAA
oklch(59.5% 0.108 219.2)
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 #C55A35, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Terra Cotta #C9643B ΔE 0.024
- Rust Orange #C45508 ΔE 0.026
- Rusty Orange #CD5909 ΔE 0.028
- Terracotta #CA6641 ΔE 0.029
- Terracota #CB6843 ΔE 0.034
- Burnt Orange #C04E01 ΔE 0.036
- Brick Orange #C14A09 ΔE 0.038
- Copper #B66325 ΔE 0.039
Use #C55A35 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.