#C55A00
Closest named color: Rust Orange (#C45508). oklch(59.1% 0.158 49.2), rgb(197, 90, 0).
Aa
Black text reads best on this color (4.83:1).
About this color
#C55A00 is a medium-dark, vivid orange. In OKLCH its lightness is 59%, its chroma 0.158 and its hue 49°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.012 away. Black text reads best on it, at 4.83:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #C55A00 |
| RGB | rgb(197, 90, 0) |
| HSL | hsl(27, 100%, 39%) |
| OKLCH | oklch(59.1% 0.158 49.2) |
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 #C55A00 | 4.34:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #C55A00 | 4.83:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #C55A00 text on white | 4.34:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #C55A00 text on black | 4.83:1 | AA | Lc -32.3 | 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 600.
-
Step 50
50
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F6E6DE
oklch(93.6% 0.021 48.5)
-
Step 200
200
#F0D2C3
oklch(88.5% 0.039 48.3)
-
Step 300
300
#E7B498
oklch(80.9% 0.071 50.1)
-
Step 400
400
#DA8A5E
oklch(70.7% 0.114 49)
-
Step 500
500
#CD6A2C
oklch(63% 0.145 49.1)
-
Step 600
600 (this color)
#C55A00
oklch(59.1% 0.158 49.2)
-
Step 700
700
#994400
oklch(49% 0.131 49)
-
Step 800
800
#7E3700
oklch(42.6% 0.114 49.2)
-
Step 900
900
#682F07
oklch(37.7% 0.095 49.4)
-
Step 950
950
#3D1C08
oklch(26.9% 0.06 49.1)
#C55A00 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) | #796A00 | 0.140 |
| Deuteranopia (no green cones) | #938300 | 0.128 |
| Tritanopia (no blue cones) | #D9404D | 0.091 |
| Achromatopsia (no color) | #797979 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55A00
#C55A00
oklch(59.1% 0.158 49.2)
- #008AB5
#008AB5
oklch(59.2% 0.117 229)
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 #C55A00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.012
- Rusty Orange #CD5909 ΔE 0.016
- Orange Brown #BE6400 ΔE 0.024
- Burnt Orange #C04E01 ΔE 0.028
- Copper #B66325 ΔE 0.031
- Rust #CA6702 ΔE 0.031
- Burnt Siena #B75203 ΔE 0.034
- Brick Orange #C14A09 ΔE 0.036
Use #C55A00 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.