#665B90
Closest named color: Dusky Blue (#475F94). oklch(50.4% 0.084 292.7), rgb(102, 91, 144).
Aa
White text reads best on this color (6.06:1).
About this color
#665B90 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.084 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 0.044 away. White text reads best on it, at 6.06:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.084) |
| Temperature | in between |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.46:1 |
| White text | 6.06:1 |
Values
| HEX | #665B90 |
| RGB | rgb(102, 91, 144) |
| HSL | hsl(252, 23%, 46%) |
| OKLCH | oklch(50.4% 0.084 292.7) |
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 #665B90 | 6.06:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #665B90 | 3.46:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #665B90 text on white | 6.06:1 | AA | Lc 80.2 | Fine for body text |
| #665B90 text on black | 3.46:1 | AA large text | Lc -21.6 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#EAE9F1
oklch(93.7% 0.011 291.9)
-
Step 200
200
#D9D7E7
oklch(88.6% 0.022 291.7)
-
Step 300
300
#C1BCD9
oklch(80.9% 0.041 293.4)
-
Step 400
400
#A19AC6
oklch(70.8% 0.064 292)
-
Step 500
500
#8B80B7
oklch(63.1% 0.082 293.1)
-
Step 600
600
#7569A3
oklch(55.6% 0.089 292.8)
-
Step 700
700 (this color)
#665B90
oklch(50.4% 0.084 292.7)
-
Step 800
800
#504872
oklch(42.8% 0.069 292)
-
Step 900
900
#423C5C
oklch(37.6% 0.054 292.2)
-
Step 950
950
#272336
oklch(27% 0.035 293.6)
#665B90 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) | #4C6392 | 0.041 |
| Deuteranopia (no green cones) | #4E618F | 0.038 |
| Tritanopia (no blue cones) | #5D646F | 0.068 |
| Achromatopsia (no color) | #626262 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665B90
#665B90
oklch(50.4% 0.084 292.7)
- #65692C
#65692C
oklch(50.3% 0.084 112.5)
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 #665B90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.044
- Muted Purple #805B87 ΔE 0.046
- Dusk #4E5481 ΔE 0.049
- Twilight #4E518B ΔE 0.050
- Dusty Purple #825F87 ΔE 0.052
- Dusty Grape #545775 ΔE 0.053
- Dull Purple #84597E ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.060
Use #665B90 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.