#665DBF
Closest named color: Iris (#6258C4). oklch(53.6% 0.148 284.4), rgb(102, 93, 191).
Aa
White text reads best on this color (5.40:1).
About this color
#665DBF is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.148 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.017 away. White text reads best on it, at 5.40:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #665DBF |
| RGB | rgb(102, 93, 191) |
| HSL | hsl(246, 43%, 56%) |
| OKLCH | oklch(53.6% 0.148 284.4) |
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 #665DBF | 5.40:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #665DBF | 3.88:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #665DBF text on white | 5.40:1 | AA | Lc 76.7 | Fine for body text |
| #665DBF text on black | 3.88:1 | AA large text | Lc -25.0 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D6D6F1
oklch(88.4% 0.037 285.6)
-
Step 300
300
#BBBBEB
oklch(80.8% 0.067 284.8)
-
Step 400
400
#9997E1
oklch(70.7% 0.107 284.5)
-
Step 500
500
#817CD8
oklch(63.1% 0.136 284.3)
-
Step 600
600 (this color)
#665DBF
oklch(53.6% 0.148 284.4)
-
Step 700
700
#5A52AB
oklch(49.2% 0.138 284.2)
-
Step 800
800
#49438A
oklch(42.6% 0.114 284.3)
-
Step 900
900
#3D396F
oklch(37.7% 0.09 284.6)
-
Step 950
950
#242241
oklch(27.1% 0.057 284.9)
#665DBF 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) | #2F6DC2 | 0.070 |
| Deuteranopia (no green cones) | #2B67BD | 0.069 |
| Tritanopia (no blue cones) | #487285 | 0.126 |
| Achromatopsia (no color) | #6A6A6A | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665DBF
#665DBF
oklch(53.6% 0.148 284.4)
- #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 #665DBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.017
- Slate Blue #6A5ACD ΔE 0.024
- Dark Periwinkle #665FD1 ΔE 0.028
- Light Indigo #6D5ACF ΔE 0.028
- Warm Blue #4B57DB ΔE 0.061
- French Blue #436BAD ΔE 0.065
- Bluey Purple #6241C7 ΔE 0.066
- Deep Lavender #8D5EB7 ΔE 0.066
Use #665DBF 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.