#C55B2D
Closest named color: Rust Orange (#C45508). oklch(59.5% 0.148 42.3), rgb(197, 91, 45).
Aa
Black text reads best on this color (4.90:1).
About this color
#C55B2D is a medium-dark, vivid orange. In OKLCH its lightness is 60%, its chroma 0.148 and its hue 42°. Its hue sits on the warm side of the wheel. The nearest named color is Rust Orange (#C45508), ΔE 0.020 away. Black text reads best on it, at 4.90:1.
| Hue family | Oranges |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.148) |
| Temperature | warm |
| Nearest name | Rust Orange (#C45508) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #C55B2D |
| RGB | rgb(197, 91, 45) |
| HSL | hsl(18, 63%, 47%) |
| OKLCH | oklch(59.5% 0.148 42.3) |
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 #C55B2D | 4.27:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #C55B2D | 4.90:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #C55B2D text on white | 4.27:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #C55B2D text on black | 4.90:1 | AA | Lc -32.7 | 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 500.
-
Step 50
50
#FCF3F0
oklch(97% 0.011 39.4)
-
Step 100
100
#F7E6DF
oklch(93.7% 0.021 43.9)
-
Step 200
200
#F1D1C5
oklch(88.4% 0.04 41.7)
-
Step 300
300
#EAB29C
oklch(80.9% 0.072 42.4)
-
Step 400
400
#DD8765
oklch(70.7% 0.116 42.2)
-
Step 500
500 (this color)
#C55B2D
oklch(59.5% 0.148 42.3)
-
Step 600
600
#BD4A0E
oklch(55.7% 0.161 42.2)
-
Step 700
700
#A23B00
oklch(49.2% 0.148 42.2)
-
Step 800
800
#843106
oklch(42.7% 0.124 42.2)
-
Step 900
900
#6A2C11
oklch(37.6% 0.097 42)
-
Step 950
950
#3F1B0C
oklch(27.1% 0.061 42.2)
#C55B2D 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) | #796C27 | 0.140 |
| Deuteranopia (no green cones) | #92832A | 0.128 |
| Tritanopia (no blue cones) | #D84451 | 0.074 |
| Achromatopsia (no color) | #7A7A7A | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C55B2D
#C55B2D
oklch(59.5% 0.148 42.3)
- #008DAE
#008DAE
oklch(59.6% 0.11 222)
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 #C55B2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust Orange #C45508 ΔE 0.020
- Rusty Orange #CD5909 ΔE 0.022
- Terra Cotta #C9643B ΔE 0.023
- Terracotta #CA6641 ΔE 0.029
- Burnt Orange #C04E01 ΔE 0.033
- Copper #B66325 ΔE 0.034
- Terracota #CB6843 ΔE 0.034
- Orange Brown #BE6400 ΔE 0.037
Use #C55B2D 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.