#665D9D
Closest named color: Dusky Blue (#475F94). oklch(51.5% 0.1 288.9), rgb(102, 93, 157).
Aa
White text reads best on this color (5.80:1).
About this color
#665D9D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 52%, its chroma 0.100 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.047 away. White text reads best on it, at 5.80:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #665D9D |
| RGB | rgb(102, 93, 157) |
| HSL | hsl(248, 26%, 49%) |
| OKLCH | oklch(51.5% 0.1 288.9) |
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 #665D9D | 5.80:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #665D9D | 3.61:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #665D9D text on white | 5.80:1 | AA | Lc 79.0 | Fine for body text |
| #665D9D 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E9F3
oklch(93.7% 0.013 286.1)
-
Step 200
200
#D8D7EA
oklch(88.6% 0.026 288.3)
-
Step 300
300
#BFBCDF
oklch(80.9% 0.049 289.2)
-
Step 400
400
#9E99CE
oklch(70.6% 0.077 288.6)
-
Step 500
500
#877FC2
oklch(63% 0.1 288.7)
-
Step 600
600
#7268AE
oklch(55.7% 0.107 289)
-
Step 700
700 (this color)
#665D9D
oklch(51.5% 0.1 288.9)
-
Step 800
800
#4E4779
oklch(42.8% 0.082 288.9)
-
Step 900
900
#403C62
oklch(37.8% 0.064 287.7)
-
Step 950
950
#262339
oklch(27% 0.04 289.7)
#665D9D 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) | #49679F | 0.045 |
| Deuteranopia (no green cones) | #49649B | 0.043 |
| Tritanopia (no blue cones) | #586975 | 0.084 |
| Achromatopsia (no color) | #656565 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665D9D
#665D9D
oklch(51.5% 0.1 288.9)
- #6C6C1B
#6C6C1B
oklch(51.6% 0.1 109.5)
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 #665D9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.047
- Muted Purple #805B87 ΔE 0.054
- French Blue #436BAD ΔE 0.057
- Twilight #4E518B ΔE 0.058
- Dusty Purple #825F87 ΔE 0.059
- Dark Lavender #856798 ΔE 0.062
- Dusk #4E5481 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.064
Use #665D9D 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.