#665CC0
Closest named color: Iris (#6258C4). oklch(53.5% 0.151 284.6), rgb(102, 92, 192).
Aa
White text reads best on this color (5.44:1).
About this color
#665CC0 is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.151 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.014 away. White text reads best on it, at 5.44:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.85:1 |
| White text | 5.44:1 |
Values
| HEX | #665CC0 |
| RGB | rgb(102, 92, 192) |
| HSL | hsl(246, 44%, 56%) |
| OKLCH | oklch(53.5% 0.151 284.6) |
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 #665CC0 | 5.44:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #665CC0 | 3.85:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #665CC0 text on white | 5.44:1 | AA | Lc 76.9 | Fine for body text |
| #665CC0 text on black | 3.85:1 | AA large text | Lc -24.8 | 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 600.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D6D6F2
oklch(88.5% 0.038 285.6)
-
Step 300
300
#BBBBEC
oklch(80.9% 0.069 284.8)
-
Step 400
400
#9997E2
oklch(70.7% 0.109 284.5)
-
Step 500
500
#817BDA
oklch(63.1% 0.14 284.5)
-
Step 600
600 (this color)
#665CC0
oklch(53.5% 0.151 284.6)
-
Step 700
700
#5A51AC
oklch(49.1% 0.14 284.4)
-
Step 800
800
#4A438B
oklch(42.8% 0.116 284.8)
-
Step 900
900
#3D396F
oklch(37.7% 0.09 284.6)
-
Step 950
950
#242241
oklch(27.1% 0.057 284.9)
#665CC0 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) | #2C6DC3 | 0.073 |
| Deuteranopia (no green cones) | #2766BE | 0.072 |
| Tritanopia (no blue cones) | #487285 | 0.129 |
| Achromatopsia (no color) | #6A6A6A | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665CC0
#665CC0
oklch(53.5% 0.151 284.6)
- #787000
#787000
oklch(53.5% 0.113 104.6)
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 #665CC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.014
- Slate Blue #6A5ACD ΔE 0.022
- Light Indigo #6D5ACF ΔE 0.026
- Dark Periwinkle #665FD1 ΔE 0.027
- Warm Blue #4B57DB ΔE 0.059
- Bluey Purple #6241C7 ΔE 0.063
- Deep Lavender #8D5EB7 ΔE 0.067
- French Blue #436BAD ΔE 0.068
Use #665CC0 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.