#6557D8
Closest named color: Slate Blue (#6A5ACD). oklch(54.2% 0.19 282.9), rgb(101, 87, 216).
Aa
White text reads best on this color (5.37:1).
About this color
#6557D8 is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.190 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Slate Blue (#6A5ACD), ΔE 0.021 away. White text reads best on it, at 5.37:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Slate Blue (#6A5ACD) |
| Black text | 3.90:1 |
| White text | 5.37:1 |
Values
| HEX | #6557D8 |
| RGB | rgb(101, 87, 216) |
| HSL | hsl(247, 62%, 59%) |
| OKLCH | oklch(54.2% 0.19 282.9) |
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 #6557D8 | 5.37:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #6557D8 | 3.90:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #6557D8 text on white | 5.37:1 | AA | Lc 76.4 | Fine for body text |
| #6557D8 text on black | 3.90:1 | AA large text | Lc -25.4 | 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
#B8BAF7
oklch(80.9% 0.086 282.8)
-
Step 400
400
#9594F3
oklch(70.7% 0.137 282.8)
-
Step 500
500
#7E76EE
oklch(63.1% 0.175 283.2)
-
Step 600
600 (this color)
#6557D8
oklch(54.2% 0.19 282.9)
-
Step 700
700
#584AC0
oklch(49.2% 0.177 283.1)
-
Step 800
800
#473E9B
oklch(42.8% 0.146 282.7)
-
Step 900
900
#3B367B
oklch(37.7% 0.113 282.8)
-
Step 950
950
#222048
oklch(26.9% 0.072 282.7)
#6557D8 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) | #006FDC | 0.090 |
| Deuteranopia (no green cones) | #0066D5 | 0.086 |
| Tritanopia (no blue cones) | #33768F | 0.162 |
| Achromatopsia (no color) | #6A6A6A | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6557D8
#6557D8
oklch(54.2% 0.19 282.9)
- #7C7100
#7C7100
oklch(54.2% 0.114 102.7)
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 #6557D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Blue #6A5ACD ΔE 0.021
- Light Indigo #6D5ACF ΔE 0.021
- Dark Periwinkle #665FD1 ΔE 0.022
- Iris #6258C4 ΔE 0.031
- Warm Blue #4B57DB ΔE 0.037
- Bluey Purple #6241C7 ΔE 0.054
- Neon Blue #4361EE ΔE 0.056
- Royal Blue #4169E1 ΔE 0.057
Use #6557D8 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.