#6557EA
Closest named color: Dark Periwinkle (#665FD1). oklch(55.7% 0.213 281.2), rgb(101, 87, 234).
Aa
White text reads best on this color (5.11:1).
About this color
#6557EA is a medium-dark, vivid purple. In OKLCH its lightness is 56%, its chroma 0.213 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.043 away. White text reads best on it, at 5.11:1.
| Hue family | Purples |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.213) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #6557EA |
| RGB | rgb(101, 87, 234) |
| HSL | hsl(246, 78%, 63%) |
| OKLCH | oklch(55.7% 0.213 281.2) |
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 #6557EA | 5.11:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #6557EA | 4.10:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #6557EA text on white | 5.11:1 | AA | Lc 74.8 | Content text, not long reading |
| #6557EA text on black | 4.10:1 | AA large text | Lc -27.0 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E6E8FD
oklch(93.6% 0.028 281.5)
-
Step 200
200
#D2D6FC
oklch(88.5% 0.052 280.5)
-
Step 300
300
#B5BAFE
oklch(80.9% 0.096 280.8)
-
Step 400
400
#9193FD
oklch(70.8% 0.153 280.9)
-
Step 500
500
#7973FB
oklch(63.1% 0.197 281.1)
-
Step 600
600 (this color)
#6557EA
oklch(55.7% 0.213 281.2)
-
Step 700
700
#5446CB
oklch(49.1% 0.197 281)
-
Step 800
800
#453AA4
oklch(42.6% 0.164 281.6)
-
Step 900
900
#393482
oklch(37.7% 0.127 281.3)
-
Step 950
950
#211F4C
oklch(26.9% 0.081 281.5)
#6557EA 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) | #0073EF | 0.090 |
| Deuteranopia (no green cones) | #0068E7 | 0.083 |
| Tritanopia (no blue cones) | #187C99 | 0.182 |
| Achromatopsia (no color) | #6E6E6E | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6557EA
#6557EA
oklch(55.7% 0.213 281.2)
- #827500
#827500
oklch(55.7% 0.116 101.7)
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 #6557EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.043
- Warm Blue #4B57DB ΔE 0.043
- Light Indigo #6D5ACF ΔE 0.044
- Neon Blue #4361EE ΔE 0.045
- Slate Blue #6A5ACD ΔE 0.046
- Medium Slate Blue #7B68EE ΔE 0.054
- Purpley #8756E4 ΔE 0.056
- Royal Blue #4169E1 ΔE 0.057
Use #6557EA 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.