#646757
Closest named color: Dim Gray (#696969). oklch(50.6% 0.025 115.9), rgb(100, 103, 87).
Aa
White text reads best on this color (5.80:1).
About this color
#646757 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.029 away. White text reads best on it, at 5.80:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #646757 |
| RGB | rgb(100, 103, 87) |
| HSL | hsl(71, 8%, 37%) |
| OKLCH | oklch(50.6% 0.025 115.9) |
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 #646757 | 5.80:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #646757 | 3.61:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #646757 text on white | 5.80:1 | AA | Lc 79.0 | Fine for body text |
| #646757 text on black | 3.61:1 | AA large text | Lc -22.8 | 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
#F5F5F4
oklch(97% 0.001 106.4)
-
Step 100
100
#E9EAE7
oklch(93.5% 0.004 121.6)
-
Step 200
200
#D9DAD5
oklch(88.6% 0.007 115.7)
-
Step 300
300
#C0C2B9
oklch(81% 0.013 116.9)
-
Step 400
400
#A0A295
oklch(70.7% 0.019 114)
-
Step 500
500
#888C7B
oklch(63.2% 0.025 117.9)
-
Step 600
600
#727564
oklch(55.5% 0.026 115.4)
-
Step 700
700 (this color)
#646757
oklch(50.6% 0.025 115.9)
-
Step 800
800
#4E5144
oklch(42.8% 0.021 117.9)
-
Step 900
900
#414339
oklch(37.8% 0.017 116.4)
-
Step 950
950
#262722
oklch(27% 0.009 116.2)
#646757 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) | #696556 | 0.009 |
| Deuteranopia (no green cones) | #696558 | 0.010 |
| Tritanopia (no blue cones) | #666562 | 0.021 |
| Achromatopsia (no color) | #656565 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646757
#646757
oklch(50.6% 0.025 115.9)
- #666272
#666272
oklch(50.6% 0.025 296.9)
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 #646757, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.029
- Dark Taupe #7F684E ΔE 0.045
- Slate #516572 ΔE 0.051
- Dark Moss Green #606C38 ΔE 0.051
- Grey Brown #7F7053 ΔE 0.053
- Dirt Brown #836539 ΔE 0.059
- Cocoa #875F42 ΔE 0.060
- Battleship Gray #6C757D ΔE 0.063
Use #646757 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.