#665C39
Closest named color: Mud (#735C12). oklch(47.5% 0.053 94), rgb(102, 92, 57).
Aa
White text reads best on this color (6.65:1).
About this color
#665C39 is a medium-dark, muted brown. In OKLCH its lightness is 48%, its chroma 0.053 and its hue 94°. Its hue sits on the warm side of the wheel. The nearest named color is Mud (#735C12), ΔE 0.040 away. White text reads best on it, at 6.65:1.
| Hue family | Browns |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.053) |
| Temperature | warm |
| Nearest name | Mud (#735C12) |
| Black text | 3.15:1 |
| White text | 6.65:1 |
Values
| HEX | #665C39 |
| RGB | rgb(102, 92, 57) |
| HSL | hsl(47, 28%, 31%) |
| OKLCH | oklch(47.5% 0.053 94) |
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 #665C39 | 6.65:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #665C39 | 3.15:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #665C39 text on white | 6.65:1 | AA | Lc 82.9 | Fine for body text |
| #665C39 text on black | 3.15:1 | AA large text | Lc -19.1 | 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
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#EBEAE4
oklch(93.6% 0.008 98.9)
-
Step 200
200
#DCD9CF
oklch(88.5% 0.014 93)
-
Step 300
300
#C6C1AE
oklch(81% 0.027 94.8)
-
Step 400
400
#A9A184
oklch(70.8% 0.042 94.4)
-
Step 500
500
#948965
oklch(63% 0.052 93.1)
-
Step 600
600
#7E734C
oklch(55.6% 0.057 94.2)
-
Step 700
700 (this color)
#665C39
oklch(47.5% 0.053 94)
-
Step 800
800
#574F33
oklch(42.8% 0.044 94)
-
Step 900
900
#47412D
oklch(37.6% 0.033 93.4)
-
Step 950
950
#2A261A
oklch(26.9% 0.022 91.8)
#665C39 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) | #635A36 | 0.009 |
| Deuteranopia (no green cones) | #665E3A | 0.006 |
| Tritanopia (no blue cones) | #6C5753 | 0.048 |
| Achromatopsia (no color) | #5C5C5C | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665C39
#665C39
oklch(47.5% 0.053 94)
- #535A7A
#535A7A
oklch(47.5% 0.053 274.7)
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 #665C39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud #735C12 ΔE 0.040
- Olive Brown #645403 ΔE 0.047
- Greeny Brown #696006 ΔE 0.048
- Dark Moss Green #606C38 ΔE 0.049
- Medium Brown #7F5112 ΔE 0.053
- Camo Green #526525 ΔE 0.053
- Milk Chocolate #7F4E1E ΔE 0.054
- Dark Olive Green #556B2F ΔE 0.057
Use #665C39 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.