#665FAA
Closest named color: Iris (#6258C4). oklch(52.7% 0.116 286), rgb(102, 95, 170).
Aa
White text reads best on this color (5.55:1).
About this color
#665FAA is a medium-dark, moderately saturated purple. In OKLCH its lightness is 53%, its chroma 0.116 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.048 away. White text reads best on it, at 5.55:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.78:1 |
| White text | 5.55:1 |
Values
| HEX | #665FAA |
| RGB | rgb(102, 95, 170) |
| HSL | hsl(246, 31%, 52%) |
| OKLCH | oklch(52.7% 0.116 286) |
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 #665FAA | 5.55:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #665FAA | 3.78:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #665FAA text on white | 5.55:1 | AA | Lc 77.6 | Fine for body text |
| #665FAA text on black | 3.78:1 | AA large text | Lc -24.1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E9F4
oklch(93.7% 0.015 286.1)
-
Step 200
200
#D7D7EC
oklch(88.6% 0.029 285.8)
-
Step 300
300
#BDBCE1
oklch(80.8% 0.052 286.4)
-
Step 400
400
#9C99D3
oklch(70.7% 0.084 286.4)
-
Step 500
500
#847FC7
oklch(63% 0.107 286.1)
-
Step 600
600 (this color)
#665FAA
oklch(52.7% 0.116 286)
-
Step 700
700
#5C569A
oklch(49.1% 0.107 285.8)
-
Step 800
800
#4B477D
oklch(42.8% 0.088 285.4)
-
Step 900
900
#3F3C65
oklch(37.9% 0.069 285.9)
-
Step 950
950
#25233B
oklch(27% 0.044 286.9)
#665FAA 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) | #446AAD | 0.050 |
| Deuteranopia (no green cones) | #4366A8 | 0.049 |
| Tritanopia (no blue cones) | #536E7C | 0.099 |
| Achromatopsia (no color) | #686868 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665FAA
#665FAA
oklch(52.7% 0.116 286)
- #746E00
#746E00
oklch(52.7% 0.112 105.9)
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 #665FAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.048
- French Blue #436BAD ΔE 0.052
- Dusky Blue #475F94 ΔE 0.058
- Slate Blue #6A5ACD ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.061
- Light Indigo #6D5ACF ΔE 0.062
- Dark Lavender #856798 ΔE 0.066
- Deep Lavender #8D5EB7 ΔE 0.068
Use #665FAA 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.