#6557BD
Closest named color: Iris (#6258C4). oklch(52.3% 0.154 286), rgb(101, 87, 189).
Aa
White text reads best on this color (5.75:1).
About this color
#6557BD is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.154 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.012 away. White text reads best on it, at 5.75:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.65:1 |
| White text | 5.75:1 |
Values
| HEX | #6557BD |
| RGB | rgb(101, 87, 189) |
| HSL | hsl(248, 44%, 54%) |
| OKLCH | oklch(52.3% 0.154 286) |
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 #6557BD | 5.75:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #6557BD | 3.65:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #6557BD text on white | 5.75:1 | AA | Lc 78.5 | Fine for body text |
| #6557BD text on black | 3.65:1 | AA large text | Lc -23.3 | 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 700.
-
Step 50
50
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F4
oklch(88.5% 0.041 285.5)
-
Step 300
300
#BCBAEF
oklch(80.9% 0.074 286.3)
-
Step 400
400
#9A95E8
oklch(70.7% 0.12 285.7)
-
Step 500
500
#8378E0
oklch(63% 0.152 286)
-
Step 600
600
#6E5FCE
oklch(55.6% 0.165 285.9)
-
Step 700
700 (this color)
#6557BD
oklch(52.3% 0.154 286)
-
Step 800
800
#4B4090
oklch(42.6% 0.127 285.9)
-
Step 900
900
#3E3773
oklch(37.6% 0.1 285.9)
-
Step 950
950
#242143
oklch(27% 0.062 285.5)
#6557BD 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) | #2269C1 | 0.080 |
| Deuteranopia (no green cones) | #1F63BB | 0.079 |
| Tritanopia (no blue cones) | #486D81 | 0.130 |
| Achromatopsia (no color) | #666666 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6557BD
#6557BD
oklch(52.3% 0.154 286)
- #736D00
#736D00
oklch(52.3% 0.112 105.9)
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 #6557BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.012
- Slate Blue #6A5ACD ΔE 0.027
- Light Indigo #6D5ACF ΔE 0.031
- Dark Periwinkle #665FD1 ΔE 0.035
- Bluey Purple #6241C7 ΔE 0.053
- Warm Blue #4B57DB ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Deep Lavender #8D5EB7 ΔE 0.072
Use #6557BD 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.