#645B54
Closest named color: Dim Gray (#696969). oklch(47.8% 0.016 60.3), rgb(100, 91, 84).
Aa
White text reads best on this color (6.63:1).
About this color
#645B54 is a medium-dark close to neutral grey. In OKLCH its lightness is 48%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.046 away. White text reads best on it, at 6.63:1.
| Hue family | Neutrals |
| Lightness | medium-dark (48%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.16:1 |
| White text | 6.63:1 |
Values
| HEX | #645B54 |
| RGB | rgb(100, 91, 84) |
| HSL | hsl(26, 9%, 36%) |
| OKLCH | oklch(47.8% 0.016 60.3) |
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 #645B54 | 6.63:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #645B54 | 3.16:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #645B54 text on white | 6.63:1 | AA | Lc 82.8 | Fine for body text |
| #645B54 text on black | 3.16:1 | AA large text | Lc -19.1 | 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
#F6F5F5
oklch(97.1% 0.001 17.2)
-
Step 100
100
#EBE9E8
oklch(93.5% 0.003 48.7)
-
Step 200
200
#DBD8D6
oklch(88.4% 0.004 56.4)
-
Step 300
300
#C4BFBC
oklch(80.8% 0.007 53.4)
-
Step 400
400
#A79F99
oklch(70.8% 0.013 59.5)
-
Step 500
500
#918780
oklch(63% 0.016 57.4)
-
Step 600
600
#7B7169
oklch(55.5% 0.017 61.1)
-
Step 700
700 (this color)
#645B54
oklch(47.8% 0.016 60.3)
-
Step 800
800
#554D48
oklch(42.6% 0.013 54.2)
-
Step 900
900
#46403C
oklch(37.6% 0.011 56)
-
Step 950
950
#292623
oklch(27.1% 0.007 67.5)
#645B54 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) | #5E5B54 | 0.010 |
| Deuteranopia (no green cones) | #605D54 | 0.008 |
| Tritanopia (no blue cones) | #675959 | 0.013 |
| Achromatopsia (no color) | #5D5D5D | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B54
#645B54
oklch(47.8% 0.016 60.3)
- #555E65
#555E65
oklch(47.7% 0.016 241.2)
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 #645B54, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.046
- Slate #516572 ΔE 0.051
- Dusty Grape #545775 ΔE 0.063
- Dark Taupe #7F684E ΔE 0.064
- Cocoa #875F42 ΔE 0.067
- Brownish Purple #76424E ΔE 0.073
- YInMn Blue #415A77 ΔE 0.074
- Milk Chocolate #7F4E1E ΔE 0.075
Use #645B54 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.