Copper #B66325
Copper is a medium-dark, moderately saturated brown with hex code #B66325 and RGB rgb(182, 99, 37).
Aa
Black text reads best on this color (4.80:1).
About this color
#B66325 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 59%, its chroma 0.129 and its hue 53°. Its hue sits on the warm side of the wheel. It is the named color Copper. Black text reads best on it, at 4.80:1.
| Hue family | Browns |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.129) |
| Temperature | warm |
| Nearest name | Copper |
| Black text | 4.80:1 |
| White text | 4.37:1 |
Colors that go with Copper
Matches found by rotating Copper around the OKLCH hue wheel, each labelled with the closest name in our list.
Complementary
The opposite hue (180°).
Analogous
Neighbouring hues, 30° either side.
Triadic
Three hues spaced 120° apart.
Color palettes with Copper
Curated color palettes that contain a color within ΔE 0.06 (OKLab) of Copper, closest first.
Similar named colors
The eight named colors closest to Copper, with their ΔE distance.
- Orangey Brown #B16002 ΔE 0.020
- Umber #B26400 ΔE 0.020
- Orange Brown #BE6400 ΔE 0.021
- Brown Orange #B96902 ΔE 0.025
- Tiger's Eye #BC6C25 ΔE 0.026
- Clay Brown #B2713D ΔE 0.033
- Rust Orange #C45508 ΔE 0.035
- Raw Umber #A75E09 ΔE 0.035
More about Copper
How to make Copper
A starting recipe from common paint colors, found with a spectral paint model (the color mixer’s paint mode). Real pigments vary, so mix a small test batch and adjust.
- 4 parts orange
- 3 parts brown
- 1 part red
Recipe result: #B66626, a difference of ΔE 0.006 from Copper. That is very close: most people will not see the difference.
Codes for Copper in every format
| HEX | #B66325 |
| RGB | rgb(182, 99, 37) |
| HSL | hsl(26, 66%, 43%) |
| OKLCH | oklch(58.6% 0.129 53.1) |
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 #B66325 | 4.37:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #B66325 | 4.80:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #B66325 text on white | 4.37:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #B66325 text on black | 4.80:1 | AA | Lc -31.8 | Non-text elements, placeholder text |
Shades and tints of Copper
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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F3E7E0
oklch(93.6% 0.016 52.6)
-
Step 200
200
#EBD4C6
oklch(88.5% 0.032 53.5)
-
Step 300
300
#E0B79E
oklch(80.9% 0.059 53)
-
Step 400
400
#CF9069
oklch(70.7% 0.093 52.4)
-
Step 500
500
#C1733E
oklch(63.1% 0.12 52.9)
-
Step 600
600 (this color)
#B66325
oklch(58.6% 0.129 53.1)
-
Step 700
700
#944909
oklch(49.1% 0.121 52.6)
-
Step 800
800
#783D0E
oklch(42.7% 0.1 53.3)
-
Step 900
900
#613415
oklch(37.6% 0.078 52.4)
-
Step 950
950
#391F0E
oklch(27% 0.049 52.4)
Copper 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) | #7B6D1C | 0.107 |
| Deuteranopia (no green cones) | #8F8024 | 0.097 |
| Tritanopia (no blue cones) | #C85156 | 0.082 |
| Achromatopsia (no color) | #797979 | 0.130 |
Use Copper 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.