#645C2C
Closest named color: Mud (#735C12). oklch(47.1% 0.068 100), rgb(100, 92, 44).
Aa
White text reads best on this color (6.75:1).
About this color
#645C2C is a medium-dark, muted brown. In OKLCH its lightness is 47%, its chroma 0.068 and its hue 100°. Its hue sits on the warm side of the wheel. The nearest named color is Mud (#735C12), ΔE 0.030 away. White text reads best on it, at 6.75:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.068) |
| Temperature | warm |
| Nearest name | Mud (#735C12) |
| Black text | 3.10:1 |
| White text | 6.75:1 |
Values
| HEX | #645C2C |
| RGB | rgb(100, 92, 44) |
| HSL | hsl(51, 39%, 28%) |
| OKLCH | oklch(47.1% 0.068 100) |
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 #645C2C | 6.75:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #645C2C | 3.10:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #645C2C text on white | 6.75:1 | AA | Lc 83.2 | Fine for body text |
| #645C2C text on black | 3.10:1 | AA large text | Lc -18.7 | 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
#F6F5F2
oklch(97% 0.004 91.4)
-
Step 100
100
#EBEAE3
oklch(93.6% 0.009 100)
-
Step 200
200
#DCDACC
oklch(88.6% 0.019 100.2)
-
Step 300
300
#C5C2AA
oklch(81% 0.033 101.2)
-
Step 400
400
#A8A27C
oklch(70.7% 0.053 100.1)
-
Step 500
500
#938B5A
oklch(63.2% 0.068 100.1)
-
Step 600
600
#7D7440
oklch(55.5% 0.073 99.7)
-
Step 700
700 (this color)
#645C2C
oklch(47.1% 0.068 100)
-
Step 800
800
#56502A
oklch(42.8% 0.056 100.5)
-
Step 900
900
#474226
oklch(37.7% 0.044 99.4)
-
Step 950
950
#292717
oklch(27% 0.028 102)
#645C2C 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) | #645A28 | 0.006 |
| Deuteranopia (no green cones) | #665D2E | 0.005 |
| Tritanopia (no blue cones) | #6B5651 | 0.063 |
| Achromatopsia (no color) | #5B5B5B | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645C2C
#645C2C
oklch(47.1% 0.068 100)
- #535781
#535781
oklch(47.1% 0.068 279.3)
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 #645C2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud #735C12 ΔE 0.030
- Olive Brown #645403 ΔE 0.032
- Greeny Brown #696006 ΔE 0.033
- Camo Green #526525 ΔE 0.041
- Dark Moss Green #606C38 ΔE 0.045
- Dark Olive Green #556B2F ΔE 0.048
- Mud Green #606602 ΔE 0.049
- Army Green #4B5D16 ΔE 0.049
Use #645C2C 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.