#6655B8
Closest named color: Iris (#6258C4). oklch(51.7% 0.15 287.8), rgb(102, 85, 184).
Aa
White text reads best on this color (5.90:1).
About this color
#6655B8 is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.150 and its hue 288°. 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 5.90:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.55:1 |
| White text | 5.90:1 |
Values
| HEX | #6655B8 |
| RGB | rgb(102, 85, 184) |
| HSL | hsl(250, 41%, 53%) |
| OKLCH | oklch(51.7% 0.15 287.8) |
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 #6655B8 | 5.90:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #6655B8 | 3.55:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #6655B8 text on white | 5.90:1 | AA | Lc 79.3 | Fine for body text |
| #6655B8 text on black | 3.55:1 | AA large text | Lc -22.5 | 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 700.
-
Step 50
50
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D7D6F3
oklch(88.6% 0.04 287.1)
-
Step 300
300
#BDBAEE
oklch(80.9% 0.073 287.3)
-
Step 400
400
#9D94E5
oklch(70.6% 0.117 288.1)
-
Step 500
500
#8678DD
oklch(63.1% 0.148 287.7)
-
Step 600
600
#715ECB
oklch(55.5% 0.162 287.9)
-
Step 700
700 (this color)
#6655B8
oklch(51.7% 0.15 287.8)
-
Step 800
800
#4D408E
oklch(42.7% 0.124 287.6)
-
Step 900
900
#403771
oklch(37.7% 0.096 288)
-
Step 950
950
#252142
oklch(27% 0.06 287.2)
#6655B8 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) | #2466BB | 0.081 |
| Deuteranopia (no green cones) | #2462B6 | 0.080 |
| Tritanopia (no blue cones) | #4D6A7E | 0.125 |
| Achromatopsia (no color) | #646464 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6655B8
#6655B8
oklch(51.7% 0.15 287.8)
- #6F6C00
#6F6C00
oklch(51.7% 0.111 107.8)
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 #6655B8, 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 0.035
- Light Indigo #6D5ACF ΔE 0.039
- Dark Periwinkle #665FD1 ΔE 0.044
- Bluey Purple #6241C7 ΔE 0.052
- Warm Blue #4B57DB ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.071
- Deep Lavender #8D5EB7 ΔE 0.072
Use #6655B8 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.