#66540C
Closest named color: Olive Brown (#645403). oklch(45.1% 0.087 93.5), rgb(102, 84, 12).
Aa
White text reads best on this color (7.39:1).
About this color
#66540C is a medium-dark, moderately saturated brown. In OKLCH its lightness is 45%, its chroma 0.087 and its hue 93°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.006 away. White text reads best on it, at 7.39:1.
| Hue family | Browns |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.087) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.83:1 |
| White text | 7.39:1 |
Values
| HEX | #66540C |
| RGB | rgb(102, 84, 12) |
| HSL | hsl(48, 79%, 22%) |
| OKLCH | oklch(45.1% 0.087 93.5) |
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 #66540C | 7.39:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #66540C | 2.83:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #66540C text on white | 7.39:1 | AAA | Lc 85.6 | Fine for body text |
| #66540C text on black | 2.83:1 | 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
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#EDEADF
oklch(93.6% 0.015 94.2)
-
Step 200
200
#DFD9C5
oklch(88.5% 0.028 93.1)
-
Step 300
300
#CBC19C
oklch(81% 0.051 94.7)
-
Step 400
400
#B2A064
oklch(70.8% 0.082 93.3)
-
Step 500
500
#9F8836
oklch(63.2% 0.104 93.5)
-
Step 600
600
#8A7102
oklch(55.6% 0.113 93.4)
-
Step 700
700
#745F00
oklch(49.2% 0.101 93.8)
-
Step 800
800 (this color)
#66540C
oklch(45.1% 0.087 93.5)
-
Step 900
900
#4E400F
oklch(37.6% 0.068 92.5)
-
Step 950
950
#2D260B
oklch(27% 0.043 94.8)
#66540C 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) | #5E5200 | 0.017 |
| Deuteranopia (no green cones) | #635811 | 0.012 |
| Tritanopia (no blue cones) | #6F4C47 | 0.080 |
| Achromatopsia (no color) | #555555 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66540C
#66540C
oklch(45.1% 0.087 93.5)
- #465186
#465186
oklch(45.1% 0.088 273.5)
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 #66540C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.006
- Mud #735C12 ΔE 0.034
- Greeny Brown #696006 ΔE 0.037
- Green Brown #544E03 ΔE 0.038
- Mud Brown #60460F ΔE 0.044
- Medium Brown #7F5112 ΔE 0.047
- Army Green #4B5D16 ΔE 0.048
- Milk Chocolate #7F4E1E ΔE 0.053
Use #66540C 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.