#66658B
Closest named color: Dusty Purple (#825F87). oklch(52.3% 0.059 285.4), rgb(102, 101, 139).
Aa
White text reads best on this color (5.52:1).
About this color
#66658B is a medium-dark, muted purple. In OKLCH its lightness is 52%, its chroma 0.059 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Purple (#825F87), ΔE 0.046 away. White text reads best on it, at 5.52:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dusty Purple (#825F87) |
| Black text | 3.79:1 |
| White text | 5.52:1 |
Values
| HEX | #66658B |
| RGB | rgb(102, 101, 139) |
| HSL | hsl(242, 16%, 47%) |
| OKLCH | oklch(52.3% 0.059 285.4) |
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 #66658B | 5.52:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #66658B | 3.79:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #66658B text on white | 5.52:1 | AA | Lc 77.6 | Fine for body text |
| #66658B text on black | 3.79:1 | AA large text | Lc -24.2 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9EF
oklch(93.6% 0.008 286.2)
-
Step 200
200
#D8D8E4
oklch(88.6% 0.016 286.1)
-
Step 300
300
#BEBED3
oklch(80.8% 0.029 285.7)
-
Step 400
400
#9D9DBD
oklch(70.7% 0.046 285.2)
-
Step 500
500
#8585AC
oklch(63.1% 0.058 284.6)
-
Step 600
600
#6F6E98
oklch(55.6% 0.065 285.2)
-
Step 700
700 (this color)
#66658B
oklch(52.3% 0.059 285.4)
-
Step 800
800
#4C4B69
oklch(42.6% 0.049 285.6)
-
Step 900
900
#3F3F55
oklch(37.7% 0.037 284.5)
-
Step 950
950
#252532
oklch(27% 0.024 284.7)
#66658B 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) | #5B6A8D | 0.020 |
| Deuteranopia (no green cones) | #5A678A | 0.018 |
| Tritanopia (no blue cones) | #5D6C72 | 0.053 |
| Achromatopsia (no color) | #696969 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66658B
#66658B
oklch(52.3% 0.059 285.4)
- #6E6C43
#6E6C43
oklch(52.3% 0.059 105.9)
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 #66658B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Purple #825F87 ΔE 0.046
- Metallic Blue #4F738E ΔE 0.047
- Muted Purple #805B87 ΔE 0.047
- Dusky Blue #475F94 ΔE 0.052
- Grey Purple #826D8C ΔE 0.052
- Slate #516572 ΔE 0.053
- Dull Blue #49759C ΔE 0.055
- Dark Lavender #856798 ΔE 0.055
Use #66658B 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.