#A66404
Closest named color: Raw Umber (#A75E09). oklch(56.4% 0.124 65.9), rgb(166, 100, 4).
Aa
White text reads best on this color (4.72:1).
About this color
#A66404 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 56%, its chroma 0.124 and its hue 66°. Its hue sits on the warm side of the wheel. The nearest named color is Raw Umber (#A75E09), ΔE 0.015 away. White text reads best on it, at 4.72:1.
| Hue family | Browns |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.124) |
| Temperature | warm |
| Nearest name | Raw Umber (#A75E09) |
| Black text | 4.44:1 |
| White text | 4.72:1 |
Values
| HEX | #A66404 |
| RGB | rgb(166, 100, 4) |
| HSL | hsl(36, 95%, 33%) |
| OKLCH | oklch(56.4% 0.124 65.9) |
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 #A66404 | 4.72:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #A66404 | 4.44:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #A66404 text on white | 4.72:1 | AA | Lc 72.4 | Content text, not long reading |
| #A66404 text on black | 4.44:1 | AA large text | Lc -29.3 | 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
#F2E8DF
oklch(93.6% 0.016 64.7)
-
Step 200
200
#E8D6C4
oklch(88.6% 0.031 67.4)
-
Step 300
300
#DABA9B
oklch(80.9% 0.056 66)
-
Step 400
400
#C79563
oklch(70.6% 0.09 65.5)
-
Step 500
500
#B87A34
oklch(63.1% 0.115 66)
-
Step 600
600 (this color)
#A66404
oklch(56.4% 0.124 65.9)
-
Step 700
700
#8A5200
oklch(49.2% 0.11 66)
-
Step 800
800
#714200
oklch(42.6% 0.095 65.8)
-
Step 900
900
#5C380E
oklch(37.6% 0.075 65.3)
-
Step 950
950
#36210A
oklch(26.9% 0.048 65.6)
#A66404 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) | #796A00 | 0.081 |
| Deuteranopia (no green cones) | #897907 | 0.072 |
| Tritanopia (no blue cones) | #B65455 | 0.096 |
| Achromatopsia (no color) | #737373 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A66404
#A66404
oklch(56.4% 0.124 65.9)
- #287BBA
#287BBA
oklch(56.4% 0.125 245.9)
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 #A66404, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Raw Umber #A75E09 ΔE 0.015
- Orangey Brown #B16002 ΔE 0.021
- Umber #B26400 ΔE 0.022
- Raw Sienna #9A6200 ΔE 0.023
- Caramel #AF6F09 ΔE 0.033
- Copper #B66325 ΔE 0.036
- Brown Orange #B96902 ΔE 0.038
- Sepia #985E2B ΔE 0.039
Use #A66404 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.