#A66600
Closest named color: Raw Umber (#A75E09). oklch(56.8% 0.125 67.8), rgb(166, 102, 0).
Aa
White text reads best on this color (4.64:1).
About this color
#A66600 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 57%, its chroma 0.125 and its hue 68°. Its hue sits on the warm side of the wheel. The nearest named color is Raw Umber (#A75E09), ΔE 0.021 away. White text reads best on it, at 4.64:1.
| Hue family | Browns |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.125) |
| Temperature | warm |
| Nearest name | Raw Umber (#A75E09) |
| Black text | 4.52:1 |
| White text | 4.64:1 |
Values
| HEX | #A66600 |
| RGB | rgb(166, 102, 0) |
| HSL | hsl(37, 100%, 33%) |
| OKLCH | oklch(56.8% 0.125 67.8) |
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 #A66600 | 4.64:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #A66600 | 4.52:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #A66600 text on white | 4.64:1 | AA | Lc 71.9 | Content text, not long reading |
| #A66600 text on black | 4.52:1 | AA | Lc -29.8 | Dividers and decoration only |
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
#F9F5F0
oklch(97.2% 0.008 73.7)
-
Step 100
100
#F1E8DF
oklch(93.6% 0.016 67.6)
-
Step 200
200
#E7D6C4
oklch(88.5% 0.031 69)
-
Step 300
300
#DABA9A
oklch(80.9% 0.057 66.9)
-
Step 400
400
#C69662
oklch(70.7% 0.09 67.8)
-
Step 500
500
#B77B32
oklch(63.2% 0.115 67.9)
-
Step 600
600 (this color)
#A66600
oklch(56.8% 0.125 67.8)
-
Step 700
700
#885300
oklch(49.1% 0.108 68.1)
-
Step 800
800
#704300
oklch(42.6% 0.094 67.6)
-
Step 900
900
#5B390C
oklch(37.7% 0.075 68.4)
-
Step 950
950
#36220A
oklch(27.2% 0.048 68.1)
#A66600 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) | #7B6B00 | 0.076 |
| Deuteranopia (no green cones) | #8A7A04 | 0.068 |
| Tritanopia (no blue cones) | #B65656 | 0.098 |
| Achromatopsia (no color) | #747474 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66600
#A66600
oklch(56.8% 0.125 67.8)
- #2E7BBC
#2E7BBC
oklch(56.7% 0.125 247.8)
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 #A66600, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Raw Umber #A75E09 ΔE 0.021
- Umber #B26400 ΔE 0.022
- Orangey Brown #B16002 ΔE 0.024
- Raw Sienna #9A6200 ΔE 0.025
- Caramel #AF6F09 ΔE 0.029
- Brown Orange #B96902 ΔE 0.037
- Copper #B66325 ΔE 0.037
- Earth #A2653E ΔE 0.042
Use #A66600 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.