#C55B1D
Closest named color: Rust Orange (#C45508). oklch(59.4% 0.153 46.2), rgb(197, 91, 29).
Aa
Black text reads best on this color (4.88:1).
About this color
#C55B1D is a medium-dark, vivid orange. In OKLCH its lightness is 59%, its chroma 0.153 and its hue 46°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.013 away. Black text reads best on it, at 4.88:1.
| Hue family | Oranges |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.153) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #C55B1D |
| RGB | rgb(197, 91, 29) |
| HSL | hsl(22, 74%, 44%) |
| OKLCH | oklch(59.4% 0.153 46.2) |
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 #C55B1D | 4.29:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #C55B1D | 4.88:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #C55B1D text on white | 4.29:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #C55B1D 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
#FCF4F0
oklch(97.2% 0.01 48.6)
-
Step 100
100
#F7E6DE
oklch(93.6% 0.022 47)
-
Step 200
200
#F2D1C3
oklch(88.5% 0.042 44.3)
-
Step 300
300
#EAB298
oklch(80.8% 0.075 46)
-
Step 400
400
#DD885E
oklch(70.7% 0.119 46.5)
-
Step 500
500 (this color)
#C55B1D
oklch(59.4% 0.153 46.2)
-
Step 600
600
#B94E00
oklch(55.5% 0.156 46.2)
-
Step 700
700
#9D4100
oklch(49.2% 0.138 46.2)
-
Step 800
800
#813400
oklch(42.6% 0.119 46.2)
-
Step 900
900
#6A2D07
oklch(37.7% 0.099 46.7)
-
Step 950
950
#3F1B08
oklch(27.1% 0.063 46)
#C55B1D 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) | #796B11 | 0.141 |
| Deuteranopia (no green cones) | #938319 | 0.127 |
| Tritanopia (no blue cones) | #D9434F | 0.083 |
| Achromatopsia (no color) | #7A7A7A | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55B1D
#C55B1D
oklch(59.4% 0.153 46.2)
- #008BB2
#008BB2
oklch(59.3% 0.114 226.4)
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 #C55B1D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.013
- Rusty Orange #CD5909 ΔE 0.015
- Terra Cotta #C9643B ΔE 0.028
- Orange Brown #BE6400 ΔE 0.028
- Burnt Orange #C04E01 ΔE 0.029
- Copper #B66325 ΔE 0.030
- Rust #CA6702 ΔE 0.033
- Terracotta #CA6641 ΔE 0.035
Use #C55B1D 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.