#665AA2
Closest named color: Dusky Blue (#475F94). oklch(51.2% 0.112 289.5), rgb(102, 90, 162).
Aa
White text reads best on this color (5.91:1).
About this color
#665AA2 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 51%, its chroma 0.112 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.053 away. White text reads best on it, at 5.91:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.54:1 |
| White text | 5.91:1 |
Values
| HEX | #665AA2 |
| RGB | rgb(102, 90, 162) |
| HSL | hsl(250, 29%, 49%) |
| OKLCH | oklch(51.2% 0.112 289.5) |
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 #665AA2 | 5.91:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #665AA2 | 3.54:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #665AA2 text on white | 5.91:1 | AA | Lc 79.5 | Fine for body text |
| #665AA2 text on black | 3.54:1 | AA large text | Lc -22.3 | 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
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D6EC
oklch(88.4% 0.03 289.9)
-
Step 300
300
#BFBBE2
oklch(80.8% 0.055 289.8)
-
Step 400
400
#9F98D3
oklch(70.7% 0.086 289.5)
-
Step 500
500
#887DC8
oklch(63% 0.111 289.5)
-
Step 600
600
#7365B4
oklch(55.5% 0.12 290.1)
-
Step 700
700 (this color)
#665AA2
oklch(51.2% 0.112 289.5)
-
Step 800
800
#4E457E
oklch(42.7% 0.093 289.1)
-
Step 900
900
#413A65
oklch(37.6% 0.072 289.9)
-
Step 950
950
#26223B
oklch(26.9% 0.046 290.3)
#665AA2 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) | #4265A5 | 0.053 |
| Deuteranopia (no green cones) | #4262A0 | 0.052 |
| Tritanopia (no blue cones) | #576876 | 0.093 |
| Achromatopsia (no color) | #646464 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665AA2
#665AA2
oklch(51.2% 0.112 289.5)
- #6C6B00
#6C6B00
oklch(51.2% 0.111 109.1)
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 #665AA2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.053
- Iris #6258C4 ΔE 0.055
- Twilight #4E518B ΔE 0.058
- French Blue #436BAD ΔE 0.060
- Muted Purple #805B87 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.066
- Dusk #4E5481 ΔE 0.067
- Slate Blue #6A5ACD ΔE 0.068
Use #665AA2 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.