#6556D1
Closest named color: Slate Blue (#6A5ACD). oklch(53.6% 0.182 283.9), rgb(101, 86, 209).
Aa
White text reads best on this color (5.51:1).
About this color
#6556D1 is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.182 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.015 away. White text reads best on it, at 5.51:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.80:1 |
| White text | 5.51:1 |
Values
| HEX | #6556D1 |
| RGB | rgb(101, 86, 209) |
| HSL | hsl(247, 57%, 58%) |
| OKLCH | oklch(53.6% 0.182 283.9) |
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 #6556D1 | 5.51:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #6556D1 | 3.80:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #6556D1 text on white | 5.51:1 | AA | Lc 77.2 | Fine for body text |
| #6556D1 text on black | 3.80:1 | AA large text | Lc -24.6 | 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
#D5D6F7
oklch(88.6% 0.045 284.1)
-
Step 300
300
#B9BAF4
oklch(80.8% 0.082 283.6)
-
Step 400
400
#9794EF
oklch(70.7% 0.131 284)
-
Step 500
500
#7F77EA
oklch(63.1% 0.168 283.6)
-
Step 600
600 (this color)
#6556D1
oklch(53.6% 0.182 283.9)
-
Step 700
700
#594BBB
oklch(49% 0.169 283.9)
-
Step 800
800
#493E98
oklch(42.7% 0.142 284.2)
-
Step 900
900
#3C3679
oklch(37.7% 0.11 283.8)
-
Step 950
950
#232047
oklch(27% 0.07 284.1)
#6556D1 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) | #006CD5 | 0.090 |
| Deuteranopia (no green cones) | #0065CE | 0.087 |
| Tritanopia (no blue cones) | #3A738B | 0.155 |
| Achromatopsia (no color) | #696969 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6556D1
#6556D1
oklch(53.6% 0.182 283.9)
- #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 #6556D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.015
- Light Indigo #6D5ACF ΔE 0.017
- Dark Periwinkle #665FD1 ΔE 0.021
- Iris #6258C4 ΔE 0.021
- Warm Blue #4B57DB ΔE 0.040
- Bluey Purple #6241C7 ΔE 0.048
- Royal Blue #4169E1 ΔE 0.062
- Purpley #8756E4 ΔE 0.063
Use #6556D1 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.