#645647
Closest named color: Milk Chocolate (#7F4E1E). oklch(46.3% 0.03 68.9), rgb(100, 86, 71).
Aa
White text reads best on this color (7.08:1).
About this color
#645647 is a medium-dark close to neutral grey. In OKLCH its lightness is 46%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Milk Chocolate (#7F4E1E), ΔE 0.062 away. White text reads best on it, at 7.08:1.
| Hue family | Neutrals |
| Lightness | medium-dark (46%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Milk Chocolate (#7F4E1E) |
| Black text | 2.96:1 |
| White text | 7.08:1 |
Values
| HEX | #645647 |
| RGB | rgb(100, 86, 71) |
| HSL | hsl(31, 17%, 34%) |
| OKLCH | oklch(46.3% 0.03 68.9) |
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 #645647 | 7.08:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #645647 | 2.96:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #645647 text on white | 7.08:1 | AAA | Lc 84.6 | Fine for body text |
| #645647 text on black | 2.96:1 | 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
#ECE9E7
oklch(93.6% 0.004 56.4)
-
Step 200
200
#DDD8D4
oklch(88.5% 0.008 61.4)
-
Step 300
300
#C7BFB7
oklch(80.9% 0.014 67.6)
-
Step 400
400
#AA9E92
oklch(70.6% 0.022 67.5)
-
Step 500
500
#968777
oklch(63.2% 0.03 69.1)
-
Step 600
600
#80705F
oklch(55.5% 0.032 68.8)
-
Step 700
700 (this color)
#645647
oklch(46.3% 0.03 68.9)
-
Step 800
800
#584D41
oklch(42.8% 0.024 69.5)
-
Step 900
900
#484037
oklch(37.7% 0.019 70.5)
-
Step 950
950
#2A2520
oklch(26.8% 0.012 67.3)
#645647 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) | #5B5646 | 0.015 |
| Deuteranopia (no green cones) | #5E5A47 | 0.015 |
| Tritanopia (no blue cones) | #695352 | 0.024 |
| Achromatopsia (no color) | #585858 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645647
#645647
oklch(46.3% 0.03 68.9)
- #4C5A69
#4C5A69
oklch(46.1% 0.03 250.3)
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 #645647, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Milk Chocolate #7F4E1E ΔE 0.062
- Dim Gray #696969 ΔE 0.065
- Olive Brown #645403 ΔE 0.067
- Medium Brown #7F5112 ΔE 0.067
- Brownish Purple #76424E ΔE 0.068
- Mud #735C12 ΔE 0.069
- Slate #516572 ΔE 0.069
- Cocoa #875F42 ΔE 0.070
Use #645647 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.