#66570D
Closest named color: Olive Brown (#645403). oklch(45.8% 0.089 96.6), rgb(102, 87, 13).
Aa
White text reads best on this color (7.15:1).
About this color
#66570D is a medium-dark, moderately saturated brown. In OKLCH its lightness is 46%, its chroma 0.089 and its hue 97°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.010 away. White text reads best on it, at 7.15:1.
| Hue family | Browns |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.089) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #66570D |
| RGB | rgb(102, 87, 13) |
| HSL | hsl(50, 77%, 23%) |
| OKLCH | oklch(45.8% 0.089 96.6) |
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 #66570D | 7.15:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #66570D | 2.93:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #66570D text on white | 7.15:1 | AAA | Lc 84.7 | Fine for body text |
| #66570D text on black | 2.93:1 | Fails | Lc -17.3 | 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 800.
-
Step 50
50
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#ECEADF
oklch(93.6% 0.015 98.3)
-
Step 200
200
#DEDAC4
oklch(88.6% 0.03 98.5)
-
Step 300
300
#CAC19B
oklch(80.9% 0.052 96.3)
-
Step 400
400
#AFA163
oklch(70.7% 0.083 97)
-
Step 500
500
#9C8934
oklch(63.1% 0.106 96.6)
-
Step 600
600
#877200
oklch(55.5% 0.114 96.2)
-
Step 700
700
#716000
oklch(49.1% 0.101 97)
-
Step 800
800 (this color)
#66570D
oklch(45.8% 0.089 96.6)
-
Step 900
900
#4C410E
oklch(37.6% 0.069 96.5)
-
Step 950
950
#2D260A
oklch(27% 0.044 95.2)
#66570D 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) | #615500 | 0.013 |
| Deuteranopia (no green cones) | #655A13 | 0.008 |
| Tritanopia (no blue cones) | #6F4F4A | 0.083 |
| Achromatopsia (no color) | #585858 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66570D
#66570D
oklch(45.8% 0.089 96.6)
- #4B5289
#4B5289
oklch(45.8% 0.09 276.8)
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 #66570D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.010
- Greeny Brown #696006 ΔE 0.028
- Mud #735C12 ΔE 0.028
- Green Brown #544E03 ΔE 0.043
- Army Green #4B5D16 ΔE 0.044
- Camo Green #526525 ΔE 0.046
- Mud Green #606602 ΔE 0.046
- Medium Brown #7F5112 ΔE 0.048
Use #66570D 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.