#665A91
Closest named color: Dusky Blue (#475F94). oklch(50.3% 0.087 293), rgb(102, 90, 145).
Aa
White text reads best on this color (6.11:1).
About this color
#665A91 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.087 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.045 away. White text reads best on it, at 6.11:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.087) |
| Temperature | in between |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #665A91 |
| RGB | rgb(102, 90, 145) |
| HSL | hsl(253, 23%, 46%) |
| OKLCH | oklch(50.3% 0.087 293) |
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 #665A91 | 6.11:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #665A91 | 3.43:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #665A91 text on white | 6.11:1 | AA | Lc 80.5 | Fine for body text |
| #665A91 text on black | 3.43:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#EAE8F1
oklch(93.5% 0.012 296.3)
-
Step 200
200
#D9D7E8
oklch(88.6% 0.023 291.3)
-
Step 300
300
#C1BCDA
oklch(80.9% 0.042 293.1)
-
Step 400
400
#A299C7
oklch(70.7% 0.067 293.6)
-
Step 500
500
#8B80B9
oklch(63.2% 0.085 292.6)
-
Step 600
600
#7568A5
oklch(55.5% 0.094 292.9)
-
Step 700
700 (this color)
#665A91
oklch(50.3% 0.087 293)
-
Step 800
800
#514773
oklch(42.7% 0.072 293.5)
-
Step 900
900
#433C5D
oklch(37.8% 0.056 293.3)
-
Step 950
950
#272336
oklch(27% 0.035 293.6)
#665A91 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) | #4B6393 | 0.043 |
| Deuteranopia (no green cones) | #4C6190 | 0.041 |
| Tritanopia (no blue cones) | #5D646E | 0.073 |
| Achromatopsia (no color) | #626262 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665A91
#665A91
oklch(50.3% 0.087 293)
- #646929
#646929
oklch(50.2% 0.087 113.2)
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 #665A91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.045
- Muted Purple #805B87 ΔE 0.047
- Twilight #4E518B ΔE 0.048
- Dusk #4E5481 ΔE 0.049
- Dusty Purple #825F87 ΔE 0.054
- Dusty Grape #545775 ΔE 0.055
- Dull Purple #84597E ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.060
Use #665A91 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.