#645644
Closest named color: Milk Chocolate (#7F4E1E). oklch(46.2% 0.033 73.8), rgb(100, 86, 68).
Aa
White text reads best on this color (7.10:1).
About this color
#645644 is a medium-dark, muted brown. In OKLCH its lightness is 46%, its chroma 0.033 and its hue 74°. Its hue sits on the warm side of the wheel. The nearest named color is Milk Chocolate (#7F4E1E), ΔE 0.059 away. White text reads best on it, at 7.10:1.
| Hue family | Browns |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.033) |
| Temperature | warm |
| Nearest name | Milk Chocolate (#7F4E1E) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #645644 |
| RGB | rgb(100, 86, 68) |
| HSL | hsl(34, 19%, 33%) |
| OKLCH | oklch(46.2% 0.033 73.8) |
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 #645644 | 7.10:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #645644 | 2.95:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #645644 text on white | 7.10:1 | AAA | Lc 84.6 | Fine for body text |
| #645644 text on black | 2.95:1 | Fails | Lc -17.4 | 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
#F6F5F4
oklch(97.1% 0.002 67.8)
-
Step 100
100
#ECE9E6
oklch(93.6% 0.005 67.8)
-
Step 200
200
#DDD8D3
oklch(88.5% 0.009 67.7)
-
Step 300
300
#C7BFB5
oklch(80.8% 0.017 73.6)
-
Step 400
400
#AB9F8F
oklch(70.8% 0.027 75.2)
-
Step 500
500
#968774
oklch(63.2% 0.033 73.7)
-
Step 600
600
#80715C
oklch(55.7% 0.036 76.1)
-
Step 700
700 (this color)
#645644
oklch(46.2% 0.033 73.8)
-
Step 800
800
#584D3E
oklch(42.7% 0.028 75.5)
-
Step 900
900
#494035
oklch(37.7% 0.022 72.6)
-
Step 950
950
#2B261F
oklch(27.2% 0.015 76.3)
#645644 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) | #5B5643 | 0.015 |
| Deuteranopia (no green cones) | #5F5944 | 0.012 |
| Tritanopia (no blue cones) | #695251 | 0.029 |
| Achromatopsia (no color) | #585858 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645644
#645644
oklch(46.2% 0.033 73.8)
- #4C5A6B
#4C5A6B
oklch(46.2% 0.033 253.5)
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 #645644, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Milk Chocolate #7F4E1E ΔE 0.059
- Olive Brown #645403 ΔE 0.063
- Medium Brown #7F5112 ΔE 0.064
- Mud #735C12 ΔE 0.065
- Mud Brown #60460F ΔE 0.066
- Dim Gray #696969 ΔE 0.068
- Cocoa #875F42 ΔE 0.069
- Brownish Purple #76424E ΔE 0.070
Use #645644 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.