#66541D
Closest named color: Olive Brown (#645403). oklch(45.3% 0.076 90.7), rgb(102, 84, 29).
Aa
White text reads best on this color (7.36:1).
About this color
#66541D is a medium-dark, moderately saturated brown. In OKLCH its lightness is 45%, its chroma 0.076 and its hue 91°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.017 away. White text reads best on it, at 7.36:1.
| Hue family | Browns |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.076) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.85:1 |
| White text | 7.36:1 |
Values
| HEX | #66541D |
| RGB | rgb(102, 84, 29) |
| HSL | hsl(45, 56%, 26%) |
| OKLCH | oklch(45.3% 0.076 90.7) |
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 #66541D | 7.36:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #66541D | 2.85:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #66541D text on white | 7.36:1 | AAA | Lc 85.5 | Fine for body text |
| #66541D text on black | 2.85:1 | Fails | Lc -16.5 | 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
#F7F5F1
oklch(97.1% 0.006 84.6)
-
Step 100
100
#EDEAE0
oklch(93.7% 0.014 93)
-
Step 200
200
#DFD9C7
oklch(88.5% 0.025 91.6)
-
Step 300
300
#CBC0A0
oklch(80.9% 0.045 91.3)
-
Step 400
400
#B19F6D
oklch(70.6% 0.071 90.5)
-
Step 500
500
#9E8744
oklch(63% 0.091 90.7)
-
Step 600
600
#897022
oklch(55.5% 0.099 90.5)
-
Step 700
700
#745E14
oklch(49.1% 0.092 91.1)
-
Step 800
800 (this color)
#66541D
oklch(45.3% 0.076 90.7)
-
Step 900
900
#4D4019
oklch(37.6% 0.059 90.9)
-
Step 950
950
#2D260F
oklch(27% 0.038 92.8)
#66541D 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) | #5E5316 | 0.016 |
| Deuteranopia (no green cones) | #625820 | 0.012 |
| Tritanopia (no blue cones) | #6F4D48 | 0.069 |
| Achromatopsia (no color) | #565656 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66541D
#66541D
oklch(45.3% 0.076 90.7)
- #465381
#465381
oklch(45.2% 0.077 271.1)
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 #66541D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.017
- Mud #735C12 ΔE 0.036
- Greeny Brown #696006 ΔE 0.042
- Green Brown #544E03 ΔE 0.042
- Mud Brown #60460F ΔE 0.042
- Medium Brown #7F5112 ΔE 0.045
- Milk Chocolate #7F4E1E ΔE 0.048
- Army Green #4B5D16 ΔE 0.052
Use #66541D 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.