#66580B
Closest named color: Olive Brown (#645403). oklch(46.1% 0.091 97.8), rgb(102, 88, 11).
Aa
White text reads best on this color (7.08:1).
About this color
#66580B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 46%, its chroma 0.091 and its hue 98°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.012 away. White text reads best on it, at 7.08:1.
| Hue family | Browns |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.96:1 |
| White text | 7.08:1 |
Values
| HEX | #66580B |
| RGB | rgb(102, 88, 11) |
| HSL | hsl(51, 81%, 22%) |
| OKLCH | oklch(46.1% 0.091 97.8) |
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 #66580B | 7.08:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #66580B | 2.96:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #66580B text on white | 7.08:1 | AAA | Lc 84.4 | Fine for body text |
| #66580B text on black | 2.96:1 | Fails | Lc -17.6 | 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 700.
-
Step 50
50
#F6F5F1
oklch(97% 0.005 95.1)
-
Step 100
100
#ECEAE1
oklch(93.6% 0.012 96.4)
-
Step 200
200
#DDDAC8
oklch(88.6% 0.024 99.1)
-
Step 300
300
#C8C1A1
oklch(80.8% 0.044 97)
-
Step 400
400
#ACA16E
oklch(70.6% 0.07 97.5)
-
Step 500
500
#988A47
oklch(63.1% 0.089 97.8)
-
Step 600
600
#837326
oklch(55.5% 0.097 97.3)
-
Step 700
700 (this color)
#66580B
oklch(46.1% 0.091 97.8)
-
Step 800
800
#5A4F17
oklch(42.7% 0.075 97.9)
-
Step 900
900
#4A421A
oklch(37.8% 0.059 98.1)
-
Step 950
950
#2B2710
oklch(27.1% 0.038 99.6)
#66580B 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) | #625600 | 0.011 |
| Deuteranopia (no green cones) | #665A12 | 0.006 |
| Tritanopia (no blue cones) | #6F504A | 0.084 |
| Achromatopsia (no color) | #585858 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66580B
#66580B
oklch(46.1% 0.091 97.8)
- #4C528A
#4C528A
oklch(46% 0.091 277.5)
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 #66580B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.012
- Greeny Brown #696006 ΔE 0.025
- Mud #735C12 ΔE 0.027
- Army Green #4B5D16 ΔE 0.043
- Mud Green #606602 ΔE 0.043
- Camo Green #526525 ΔE 0.044
- Green Brown #544E03 ΔE 0.045
- Camouflage Green #4B6113 ΔE 0.047
Use #66580B 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.