#645B4F
Closest named color: Dim Gray (#696969). oklch(47.6% 0.022 75.1), rgb(100, 91, 79).
Aa
White text reads best on this color (6.66:1).
About this color
#645B4F is a medium-dark close to neutral grey. In OKLCH its lightness is 48%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.050 away. White text reads best on it, at 6.66:1.
| Hue family | Neutrals |
| Lightness | medium-dark (48%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #645B4F |
| RGB | rgb(100, 91, 79) |
| HSL | hsl(34, 12%, 35%) |
| OKLCH | oklch(47.6% 0.022 75.1) |
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 #645B4F | 6.66:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #645B4F | 3.15:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #645B4F text on white | 6.66:1 | AA | Lc 82.9 | Fine for body text |
| #645B4F text on black | 3.15:1 | AA large text | Lc -19.0 | 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
#EBE9E7
oklch(93.5% 0.003 67.8)
-
Step 200
200
#DBD9D5
oklch(88.6% 0.006 84.6)
-
Step 300
300
#C5C0B9
oklch(81% 0.011 76.6)
-
Step 400
400
#A79F95
oklch(70.6% 0.017 73.6)
-
Step 500
500
#91887B
oklch(63.1% 0.022 77.2)
-
Step 600
600
#7C7264
oklch(55.7% 0.024 76.4)
-
Step 700
700 (this color)
#645B4F
oklch(47.6% 0.022 75.1)
-
Step 800
800
#554E44
oklch(42.8% 0.019 76.9)
-
Step 900
900
#464139
oklch(37.8% 0.015 79.7)
-
Step 950
950
#292622
oklch(27% 0.009 75.2)
#645B4F 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) | #5F5B4E | 0.008 |
| Deuteranopia (no green cones) | #615D4F | 0.007 |
| Tritanopia (no blue cones) | #685958 | 0.019 |
| Achromatopsia (no color) | #5C5C5C | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B4F
#645B4F
oklch(47.6% 0.022 75.1)
- #545D69
#545D69
oklch(47.5% 0.022 255.6)
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 #645B4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.050
- Slate #516572 ΔE 0.057
- Dark Taupe #7F684E ΔE 0.063
- Cocoa #875F42 ΔE 0.065
- Milk Chocolate #7F4E1E ΔE 0.069
- Dusty Grape #545775 ΔE 0.070
- Dark Moss Green #606C38 ΔE 0.070
- Dirt Brown #836539 ΔE 0.071
Use #645B4F 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.