#645F77
Closest named color: Slate (#516572). oklch(49.9% 0.038 294.5), rgb(100, 95, 119).
Aa
White text reads best on this color (6.09:1).
About this color
#645F77 is a medium-dark, muted purple. In OKLCH its lightness is 50%, its chroma 0.038 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate (#516572), ΔE 0.035 away. White text reads best on it, at 6.09:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.038) |
| Temperature | in between |
| Nearest name | Slate (#516572) |
| Black text | 3.44:1 |
| White text | 6.09:1 |
Values
| HEX | #645F77 |
| RGB | rgb(100, 95, 119) |
| HSL | hsl(252, 11%, 42%) |
| OKLCH | oklch(49.9% 0.038 294.5) |
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 #645F77 | 6.09:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #645F77 | 3.44:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #645F77 text on white | 6.09:1 | AA | Lc 80.5 | Fine for body text |
| #645F77 text on black | 3.44:1 | AA large text | Lc -21.4 | 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
#EAE9ED
oklch(93.6% 0.005 297.7)
-
Step 200
200
#D9D8DF
oklch(88.5% 0.01 292.8)
-
Step 300
300
#C1BECC
oklch(80.8% 0.02 295.8)
-
Step 400
400
#A19DB2
oklch(70.6% 0.031 294.3)
-
Step 500
500
#8A859F
oklch(63% 0.039 294.1)
-
Step 600
600
#746F89
oklch(55.6% 0.04 293.9)
-
Step 700
700 (this color)
#645F77
oklch(49.9% 0.038 294.5)
-
Step 800
800
#504C5F
oklch(42.8% 0.031 294.7)
-
Step 900
900
#423F4E
oklch(37.7% 0.026 294.3)
-
Step 950
950
#27252D
oklch(27% 0.015 296.8)
#645F77 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) | #5A6278 | 0.016 |
| Deuteranopia (no green cones) | #5A6276 | 0.017 |
| Tritanopia (no blue cones) | #606367 | 0.033 |
| Achromatopsia (no color) | #626262 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645F77
#645F77
oklch(49.9% 0.038 294.5)
- #62664D
#62664D
oklch(50% 0.038 115.2)
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 #645F77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.035
- Dusty Grape #545775 ΔE 0.036
- Dim Gray #696969 ΔE 0.044
- YInMn Blue #415A77 ΔE 0.054
- Dusk #4E5481 ΔE 0.055
- Muted Purple #805B87 ΔE 0.056
- Dusty Purple #825F87 ΔE 0.057
- Dull Purple #84597E ΔE 0.057
Use #645F77 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.