#6555D5
Closest named color: Slate Blue (#6A5ACD). oklch(53.7% 0.189 283.7), rgb(101, 85, 213).
Aa
White text reads best on this color (5.50:1).
About this color
#6555D5 is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.189 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.020 away. White text reads best on it, at 5.50:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.81:1 |
| White text | 5.50:1 |
Values
| HEX | #6555D5 |
| RGB | rgb(101, 85, 213) |
| HSL | hsl(248, 60%, 58%) |
| OKLCH | oklch(53.7% 0.189 283.7) |
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 #6555D5 | 5.50:1 | AA | Lc -82.4 | Fine for body text |
| Black text on #6555D5 | 3.81:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #6555D5 text on white | 5.50:1 | AA | Lc 77.1 | Fine for body text |
| #6555D5 text on black | 3.81:1 | AA large text | Lc -24.7 | 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
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D4D6F8
oklch(88.5% 0.047 282.7)
-
Step 300
300
#B9BAF6
oklch(80.9% 0.084 283.6)
-
Step 400
400
#9694F2
oklch(70.7% 0.136 283.3)
-
Step 500
500
#7F76ED
oklch(63.1% 0.173 283.7)
-
Step 600
600 (this color)
#6555D5
oklch(53.7% 0.189 283.7)
-
Step 700
700
#594ABF
oklch(49.2% 0.176 283.7)
-
Step 800
800
#483D9A
oklch(42.6% 0.146 283.7)
-
Step 900
900
#3C367B
oklch(37.8% 0.113 283.5)
-
Step 950
950
#232048
oklch(27% 0.072 283.9)
#6555D5 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) | #006DD9 | 0.091 |
| Deuteranopia (no green cones) | #0065D2 | 0.088 |
| Tritanopia (no blue cones) | #36738D | 0.159 |
| Achromatopsia (no color) | #696969 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6555D5
#6555D5
oklch(53.7% 0.189 283.7)
- #797000
#797000
oklch(53.6% 0.113 104)
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 #6555D5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.020
- Light Indigo #6D5ACF ΔE 0.021
- Dark Periwinkle #665FD1 ΔE 0.025
- Iris #6258C4 ΔE 0.028
- Warm Blue #4B57DB ΔE 0.038
- Bluey Purple #6241C7 ΔE 0.048
- Neon Blue #4361EE ΔE 0.060
- Purpley #8756E4 ΔE 0.061
Use #6555D5 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.