#C55518
Closest named color: Rust Orange (#C45508). oklch(58.5% 0.158 44.2), rgb(197, 85, 24).
Aa
Black text reads best on this color (4.68:1).
About this color
#C55518 is a medium-dark, vivid orange. In OKLCH its lightness is 58%, its chroma 0.158 and its hue 44°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.007 away. Black text reads best on it, at 4.68:1.
| Hue family | Oranges |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.68:1 |
| White text | 4.48:1 |
Values
| HEX | #C55518 |
| RGB | rgb(197, 85, 24) |
| HSL | hsl(21, 78%, 43%) |
| OKLCH | oklch(58.5% 0.158 44.2) |
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 #C55518 | 4.48:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #C55518 | 4.68:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #C55518 text on white | 4.48:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #C55518 text on black | 4.68:1 | AA | Lc -31.3 | 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
#F7E6DF
oklch(93.7% 0.021 43.9)
-
Step 200
200
#F1D2C4
oklch(88.6% 0.04 45.8)
-
Step 300
300
#E9B39B
oklch(81% 0.071 45.1)
-
Step 400
400
#DC8864
oklch(70.7% 0.115 43.7)
-
Step 500
500
#D06837
oklch(63.2% 0.146 44.1)
-
Step 600
600 (this color)
#C55518
oklch(58.5% 0.158 44.2)
-
Step 700
700
#9F3E00
oklch(49.1% 0.142 44.2)
-
Step 800
800
#833303
oklch(42.8% 0.122 44.3)
-
Step 900
900
#692D10
oklch(37.6% 0.095 43.7)
-
Step 950
950
#3E1B0B
oklch(27% 0.061 43.8)
#C55518 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) | #75670A | 0.150 |
| Deuteranopia (no green cones) | #918112 | 0.136 |
| Tritanopia (no blue cones) | #D93A4A | 0.082 |
| Achromatopsia (no color) | #777777 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55518
#C55518
oklch(58.5% 0.158 44.2)
- #0089AC
#0089AC
oklch(58.5% 0.11 224)
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 #C55518, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.007
- Burnt Orange #C04E01 ΔE 0.019
- Rusty Orange #CD5909 ΔE 0.020
- Brick Orange #C14A09 ΔE 0.024
- Burnt Siena #B75203 ΔE 0.030
- Copper #B66325 ΔE 0.037
- Terra Cotta #C9643B ΔE 0.037
- Orange Brown #BE6400 ΔE 0.037
Use #C55518 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.