#6655CD
Closest named color: Slate Blue (#6A5ACD). oklch(53.2% 0.178 285), rgb(102, 85, 205).
Aa
White text reads best on this color (5.60:1).
About this color
#6655CD is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.178 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.014 away. White text reads best on it, at 5.60:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #6655CD |
| RGB | rgb(102, 85, 205) |
| HSL | hsl(249, 55%, 57%) |
| OKLCH | oklch(53.2% 0.178 285) |
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 #6655CD | 5.60:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #6655CD | 3.74:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #6655CD text on white | 5.60:1 | AA | Lc 77.7 | Fine for body text |
| #6655CD text on black | 3.74:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D5D6F6
oklch(88.5% 0.044 284)
-
Step 300
300
#BBBAF3
oklch(81% 0.08 285.3)
-
Step 400
400
#9994ED
oklch(70.7% 0.128 285.2)
-
Step 500
500
#8277E7
oklch(63.2% 0.164 285.2)
-
Step 600
600 (this color)
#6655CD
oklch(53.2% 0.178 285)
-
Step 700
700
#5B4BB9
oklch(49.1% 0.167 285.1)
-
Step 800
800
#4A3F96
oklch(42.8% 0.137 284.7)
-
Step 900
900
#3D3677
oklch(37.6% 0.107 284.9)
-
Step 950
950
#242046
oklch(27% 0.069 285.6)
#6655CD 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) | #006BD1 | 0.092 |
| Deuteranopia (no green cones) | #0064CA | 0.090 |
| Tritanopia (no blue cones) | #407189 | 0.150 |
| Achromatopsia (no color) | #686868 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6655CD
#6655CD
oklch(53.2% 0.178 285)
- #766F00
#766F00
oklch(53.1% 0.113 105.3)
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 #6655CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.014
- Iris #6258C4 ΔE 0.017
- Light Indigo #6D5ACF ΔE 0.017
- Dark Periwinkle #665FD1 ΔE 0.024
- Warm Blue #4B57DB ΔE 0.044
- Bluey Purple #6241C7 ΔE 0.045
- Purpley #8756E4 ΔE 0.065
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
Use #6655CD 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.