#645C4F
Closest named color: Dim Gray (#696969). oklch(47.8% 0.023 80), rgb(100, 92, 79).
Aa
White text reads best on this color (6.59:1).
About this color
#645C4F is a medium-dark close to neutral grey. In OKLCH its lightness is 48%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.048 away. White text reads best on it, at 6.59:1.
| Hue family | Neutrals |
| Lightness | medium-dark (48%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.18:1 |
| White text | 6.59:1 |
Values
| HEX | #645C4F |
| RGB | rgb(100, 92, 79) |
| HSL | hsl(37, 12%, 35%) |
| OKLCH | oklch(47.8% 0.023 80) |
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 #645C4F | 6.59:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #645C4F | 3.18:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #645C4F text on white | 6.59:1 | AA | Lc 82.6 | Fine for body text |
| #645C4F text on black | 3.18:1 | AA large text | Lc -19.3 | 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
#EBEAE7
oklch(93.7% 0.004 91.4)
-
Step 200
200
#DBD9D5
oklch(88.6% 0.006 84.6)
-
Step 300
300
#C4C0B9
oklch(80.9% 0.011 81.8)
-
Step 400
400
#A6A095
oklch(70.8% 0.017 82.8)
-
Step 500
500
#91887B
oklch(63.1% 0.022 77.2)
-
Step 600
600
#7B7264
oklch(55.6% 0.024 79)
-
Step 700
700 (this color)
#645C4F
oklch(47.8% 0.023 80)
-
Step 800
800
#544E44
oklch(42.7% 0.018 80.6)
-
Step 900
900
#464139
oklch(37.8% 0.015 79.7)
-
Step 950
950
#292621
oklch(27% 0.01 80.6)
#645C4F 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) | #605C4E | 0.007 |
| Deuteranopia (no green cones) | #625E4F | 0.007 |
| Tritanopia (no blue cones) | #685A58 | 0.019 |
| Achromatopsia (no color) | #5D5D5D | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645C4F
#645C4F
oklch(47.8% 0.023 80)
- #565E6A
#565E6A
oklch(47.9% 0.022 258.4)
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 #645C4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.048
- Slate #516572 ΔE 0.056
- Dark Taupe #7F684E ΔE 0.060
- Cocoa #875F42 ΔE 0.063
- Dark Moss Green #606C38 ΔE 0.067
- Dirt Brown #836539 ΔE 0.069
- Milk Chocolate #7F4E1E ΔE 0.070
- Mud #735C12 ΔE 0.070
Use #645C4F 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.