#665A37
Closest named color: Mud (#735C12). oklch(47% 0.054 91.2), rgb(102, 90, 55).
Aa
White text reads best on this color (6.81:1).
About this color
#665A37 is a medium-dark, muted brown. In OKLCH its lightness is 47%, its chroma 0.054 and its hue 91°. Its hue sits on the warm side of the wheel. The nearest named color is Mud (#735C12), ΔE 0.041 away. White text reads best on it, at 6.81:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.054) |
| Temperature | warm |
| Nearest name | Mud (#735C12) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #665A37 |
| RGB | rgb(102, 90, 55) |
| HSL | hsl(45, 30%, 31%) |
| OKLCH | oklch(47% 0.054 91.2) |
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 #665A37 | 6.81:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #665A37 | 3.08:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #665A37 text on white | 6.81:1 | AA | Lc 83.5 | Fine for body text |
| #665A37 text on black | 3.08:1 | AA large text | Lc -18.5 | 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 700.
-
Step 50
50
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#ECEAE4
oklch(93.7% 0.008 91.5)
-
Step 200
200
#DCD9CF
oklch(88.5% 0.014 93)
-
Step 300
300
#C7C0AE
oklch(80.9% 0.026 89.2)
-
Step 400
400
#AAA084
oklch(70.7% 0.041 90.7)
-
Step 500
500
#958965
oklch(63.1% 0.053 91.8)
-
Step 600
600
#80724C
oklch(55.5% 0.057 90.1)
-
Step 700
700 (this color)
#665A37
oklch(47% 0.054 91.2)
-
Step 800
800
#584E32
oklch(42.6% 0.045 90.6)
-
Step 900
900
#48412C
oklch(37.6% 0.035 91.8)
-
Step 950
950
#2A261A
oklch(26.9% 0.022 91.8)
#665A37 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) | #615934 | 0.010 |
| Deuteranopia (no green cones) | #645C38 | 0.006 |
| Tritanopia (no blue cones) | #6D5551 | 0.048 |
| Achromatopsia (no color) | #5B5B5B | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665A37
#665A37
oklch(47% 0.054 91.2)
- #505979
#505979
oklch(46.9% 0.053 272.1)
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 #665A37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud #735C12 ΔE 0.041
- Olive Brown #645403 ΔE 0.044
- Greeny Brown #696006 ΔE 0.049
- Medium Brown #7F5112 ΔE 0.051
- Milk Chocolate #7F4E1E ΔE 0.051
- Dark Moss Green #606C38 ΔE 0.054
- Camo Green #526525 ΔE 0.055
- Dark Olive Green #556B2F ΔE 0.061
Use #665A37 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.