#665DBC
Closest named color: Iris (#6258C4). oklch(53.4% 0.144 284.7), rgb(102, 93, 188).
Aa
White text reads best on this color (5.44:1).
About this color
#665DBC is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.144 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.020 away. White text reads best on it, at 5.44:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.85:1 |
| White text | 5.44:1 |
Values
| HEX | #665DBC |
| RGB | rgb(102, 93, 188) |
| HSL | hsl(246, 41%, 55%) |
| OKLCH | oklch(53.4% 0.144 284.7) |
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 #665DBC | 5.44:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #665DBC | 3.85:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #665DBC text on white | 5.44:1 | AA | Lc 77.0 | Fine for body text |
| #665DBC 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E8F6
oklch(93.5% 0.019 286)
-
Step 200
200
#D6D6F1
oklch(88.4% 0.037 285.6)
-
Step 300
300
#BBBBEA
oklch(80.8% 0.066 284.8)
-
Step 400
400
#9997DF
oklch(70.6% 0.104 284.7)
-
Step 500
500
#827CD6
oklch(63.1% 0.133 284.9)
-
Step 600
600 (this color)
#665DBC
oklch(53.4% 0.144 284.7)
-
Step 700
700
#5A52A9
oklch(49.1% 0.135 284.4)
-
Step 800
800
#4A4489
oklch(42.8% 0.111 284.6)
-
Step 900
900
#3D3A6D
oklch(37.7% 0.085 284.2)
-
Step 950
950
#242240
oklch(27% 0.055 285.1)
#665DBC 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) | #326CBF | 0.067 |
| Deuteranopia (no green cones) | #2F67BA | 0.067 |
| Tritanopia (no blue cones) | #4A7184 | 0.122 |
| Achromatopsia (no color) | #6A6A6A | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #665DBC
#665DBC
oklch(53.4% 0.144 284.7)
- #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 #665DBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.020
- Slate Blue #6A5ACD ΔE 0.029
- Dark Periwinkle #665FD1 ΔE 0.032
- Light Indigo #6D5ACF ΔE 0.033
- French Blue #436BAD ΔE 0.063
- Warm Blue #4B57DB ΔE 0.065
- Deep Lavender #8D5EB7 ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.068
Use #665DBC 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.