#665FAE
Closest named color: Iris (#6258C4). oklch(52.9% 0.121 285.5), rgb(102, 95, 174).
Aa
White text reads best on this color (5.50:1).
About this color
#665FAE is a medium-dark, moderately saturated purple. In OKLCH its lightness is 53%, its chroma 0.121 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.042 away. White text reads best on it, at 5.50:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.81:1 |
| White text | 5.50:1 |
Values
| HEX | #665FAE |
| RGB | rgb(102, 95, 174) |
| HSL | hsl(245, 33%, 53%) |
| OKLCH | oklch(52.9% 0.121 285.5) |
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 #665FAE | 5.50:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #665FAE | 3.81:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #665FAE text on white | 5.50:1 | AA | Lc 77.4 | Fine for body text |
| #665FAE text on black | 3.81:1 | AA large text | Lc -24.4 | 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
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D7D7ED
oklch(88.6% 0.03 285.8)
-
Step 300
300
#BDBCE3
oklch(80.9% 0.055 286.3)
-
Step 400
400
#9B99D5
oklch(70.7% 0.087 285.5)
-
Step 500
500
#837FCA
oklch(63.1% 0.111 285.2)
-
Step 600
600 (this color)
#665FAE
oklch(52.9% 0.121 285.5)
-
Step 700
700
#5C559D
oklch(49.1% 0.113 285.9)
-
Step 800
800
#4B4680
oklch(42.7% 0.094 285.6)
-
Step 900
900
#3E3B66
oklch(37.6% 0.072 285.5)
-
Step 950
950
#24233C
oklch(27% 0.046 284.7)
#665FAE 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) | #426BB1 | 0.052 |
| Deuteranopia (no green cones) | #4066AC | 0.051 |
| Tritanopia (no blue cones) | #516F7E | 0.104 |
| Achromatopsia (no color) | #696969 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665FAE
#665FAE
oklch(52.9% 0.121 285.5)
- #756F00
#756F00
oklch(53% 0.113 105.9)
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 #665FAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.042
- Slate Blue #6A5ACD ΔE 0.052
- French Blue #436BAD ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.055
- Dusky Blue #475F94 ΔE 0.062
- Deep Lavender #8D5EB7 ΔE 0.066
- Dark Lavender #856798 ΔE 0.069
Use #665FAE 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.