#6556AB
Closest named color: Iris (#6258C4). oklch(50.9% 0.131 289), rgb(101, 86, 171).
Aa
White text reads best on this color (6.04:1).
About this color
#6556AB is a medium-dark, moderately saturated purple. In OKLCH its lightness is 51%, its chroma 0.131 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.039 away. White text reads best on it, at 6.04:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.47:1 |
| White text | 6.04:1 |
Values
| HEX | #6556AB |
| RGB | rgb(101, 86, 171) |
| HSL | hsl(251, 34%, 50%) |
| OKLCH | oklch(50.9% 0.131 289) |
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 #6556AB | 6.04:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #6556AB | 3.47:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #6556AB text on white | 6.04:1 | AA | Lc 80.0 | Fine for body text |
| #6556AB text on black | 3.47:1 | AA large text | Lc -21.8 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D8D6F0
oklch(88.6% 0.036 289.2)
-
Step 300
300
#BFBBE8
oklch(81% 0.063 289)
-
Step 400
400
#9E96DC
oklch(70.7% 0.101 288.8)
-
Step 500
500
#887BD2
oklch(63.2% 0.128 289)
-
Step 600
600
#7262BF
oklch(55.5% 0.14 288.9)
-
Step 700
700 (this color)
#6556AB
oklch(50.9% 0.131 289)
-
Step 800
800
#4E4286
oklch(42.6% 0.109 289)
-
Step 900
900
#41396B
oklch(37.8% 0.084 289.1)
-
Step 950
950
#26223F
oklch(27.2% 0.053 288.7)
#6556AB 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) | #3464AE | 0.068 |
| Deuteranopia (no green cones) | #3561A9 | 0.066 |
| Tritanopia (no blue cones) | #526778 | 0.109 |
| Achromatopsia (no color) | #636363 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6556AB
#6556AB
oklch(50.9% 0.131 289)
- #6B6A00
#6B6A00
oklch(50.8% 0.11 109.1)
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 #6556AB, closest first.
No curated palette has a color within ΔE 0.04 of #6556AB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.039
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.061
- Dusky Blue #475F94 ΔE 0.064
- Twilight #4E518B ΔE 0.064
- French Blue #436BAD ΔE 0.067
- Bluey Purple #6241C7 ΔE 0.068
Use #6556AB 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.