#646377
Closest named color: Slate (#516572). oklch(50.8% 0.031 287.5), rgb(100, 99, 119).
Aa
White text reads best on this color (5.84:1).
About this color
#646377 is a medium-dark, muted purple. In OKLCH its lightness is 51%, its chroma 0.031 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.030 away. White text reads best on it, at 5.84:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.59:1 |
| White text | 5.84:1 |
Values
| HEX | #646377 |
| RGB | rgb(100, 99, 119) |
| HSL | hsl(243, 9%, 43%) |
| OKLCH | oklch(50.8% 0.031 287.5) |
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 #646377 | 5.84:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #646377 | 3.59:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #646377 text on white | 5.84:1 | AA | Lc 79.3 | Fine for body text |
| #646377 text on black | 3.59:1 | AA large text | Lc -22.6 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9ED
oklch(93.5% 0.005 286.3)
-
Step 200
200
#D8D8DE
oklch(88.4% 0.008 286.2)
-
Step 300
300
#C0BFCA
oklch(80.9% 0.015 290.2)
-
Step 400
400
#9F9FAF
oklch(70.8% 0.023 285.8)
-
Step 500
500
#88879C
oklch(63.1% 0.031 287.7)
-
Step 600
600
#727187
oklch(55.7% 0.034 287.3)
-
Step 700
700 (this color)
#646377
oklch(50.8% 0.031 287.5)
-
Step 800
800
#4E4D5D
oklch(42.7% 0.026 288.1)
-
Step 900
900
#41404C
oklch(37.7% 0.02 289.2)
-
Step 950
950
#26262D
oklch(27.2% 0.013 285.5)
#646377 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) | #5E6578 | 0.010 |
| Deuteranopia (no green cones) | #5E6476 | 0.010 |
| Tritanopia (no blue cones) | #60666A | 0.026 |
| Achromatopsia (no color) | #656565 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646377
#646377
oklch(50.8% 0.031 287.5)
- #676752
#676752
oklch(50.8% 0.032 107.5)
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 #646377, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.030
- Dim Gray #696969 ΔE 0.034
- Dusty Grape #545775 ΔE 0.045
- Metallic Blue #4F738E ΔE 0.054
- Battleship Gray #6C757D ΔE 0.054
- Dusty Purple #825F87 ΔE 0.058
- Muted Purple #805B87 ΔE 0.060
- YInMn Blue #415A77 ΔE 0.060
Use #646377 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.