#C55731
Closest named color: Rust Orange (#C45508). oklch(59% 0.15 39), rgb(197, 87, 49).
Aa
Black text reads best on this color (4.78:1).
About this color
#C55731 is a medium-dark, vivid red. In OKLCH its lightness is 59%, its chroma 0.150 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.023 away. Black text reads best on it, at 4.78:1.
| Hue family | Reds |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.150) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.78:1 |
| White text | 4.39:1 |
Values
| HEX | #C55731 |
| RGB | rgb(197, 87, 49) |
| HSL | hsl(15, 60%, 48%) |
| OKLCH | oklch(59% 0.15 39) |
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 #C55731 | 4.39:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #C55731 | 4.78:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #C55731 text on white | 4.39:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #C55731 text on black | 4.78:1 | AA | Lc -31.9 | 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 600.
-
Step 50
50
#FBF4F1
oklch(97.2% 0.009 44.9)
-
Step 100
100
#F6E6E0
oklch(93.6% 0.019 41.8)
-
Step 200
200
#F0D1C7
oklch(88.4% 0.038 38.7)
-
Step 300
300
#E8B2A1
oklch(80.8% 0.068 38.2)
-
Step 400
400
#DA886D
oklch(70.6% 0.108 39)
-
Step 500
500
#CE6846
oklch(63.1% 0.138 38.9)
-
Step 600
600 (this color)
#C55731
oklch(59% 0.15 39)
-
Step 700
700
#9F3D18
oklch(49.1% 0.139 39.3)
-
Step 800
800
#823317
oklch(42.8% 0.116 38.9)
-
Step 900
900
#682E1A
oklch(37.7% 0.089 39.2)
-
Step 950
950
#3D1B10
oklch(26.9% 0.057 38.5)
#C55731 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) | #75692C | 0.147 |
| Deuteranopia (no green cones) | #90822E | 0.135 |
| Tritanopia (no blue cones) | #D83F4F | 0.069 |
| Achromatopsia (no color) | #787878 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55731
#C55731
oklch(59% 0.15 39)
- #008BA8
#008BA8
oklch(58.9% 0.107 219.4)
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 #C55731, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.023
- Rusty Orange #CD5909 ΔE 0.028
- Terra Cotta #C9643B ΔE 0.029
- Burnt Orange #C04E01 ΔE 0.031
- Brick Orange #C14A09 ΔE 0.032
- Terracotta #CA6641 ΔE 0.035
- Terracota #CB6843 ΔE 0.040
- Burnt Siena #B75203 ΔE 0.040
Use #C55731 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.