#C55717
Closest named color: Rust Orange (#C45508). oklch(58.8% 0.157 45.3), rgb(197, 87, 23).
Aa
Black text reads best on this color (4.74:1).
About this color
#C55717 is a medium-dark, vivid orange. In OKLCH its lightness is 59%, its chroma 0.157 and its hue 45°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.006 away. Black text reads best on it, at 4.74:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.157) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #C55717 |
| RGB | rgb(197, 87, 23) |
| HSL | hsl(22, 79%, 43%) |
| OKLCH | oklch(58.8% 0.157 45.3) |
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 #C55717 | 4.42:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #C55717 | 4.74:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #C55717 text on white | 4.42:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #C55717 text on black | 4.74:1 | AA | Lc -31.7 | 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
#F6E6DF
oklch(93.6% 0.02 45.3)
-
Step 200
200
#F0D2C4
oklch(88.5% 0.039 46.6)
-
Step 300
300
#E8B39B
oklch(80.9% 0.07 45.5)
-
Step 400
400
#DB8963
oklch(70.7% 0.113 45.3)
-
Step 500
500
#CF6935
oklch(63.2% 0.145 45.5)
-
Step 600
600 (this color)
#C55717
oklch(58.8% 0.157 45.3)
-
Step 700
700
#9E4000
oklch(49.2% 0.14 45.4)
-
Step 800
800
#823301
oklch(42.6% 0.121 45)
-
Step 900
900
#692E0F
oklch(37.7% 0.094 45)
-
Step 950
950
#3E1C0B
oklch(27.1% 0.06 45.5)
#C55717 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) | #776807 | 0.146 |
| Deuteranopia (no green cones) | #918111 | 0.132 |
| Tritanopia (no blue cones) | #D93D4B | 0.082 |
| Achromatopsia (no color) | #787878 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55717
#C55717
oklch(58.8% 0.157 45.3)
- #0089AE
#0089AE
oklch(58.6% 0.112 225.4)
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 #C55717, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.006
- Rusty Orange #CD5909 ΔE 0.017
- Burnt Orange #C04E01 ΔE 0.022
- Brick Orange #C14A09 ΔE 0.028
- Burnt Siena #B75203 ΔE 0.031
- Orange Brown #BE6400 ΔE 0.033
- Copper #B66325 ΔE 0.034
- Terra Cotta #C9643B ΔE 0.034
Use #C55717 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.