#6657AA
Closest named color: Iris (#6258C4). oklch(51.1% 0.128 289.4), rgb(102, 87, 170).
Aa
White text reads best on this color (5.98:1).
About this color
#6657AA is a medium-dark, moderately saturated purple. In OKLCH its lightness is 51%, its chroma 0.128 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.041 away. White text reads best on it, at 5.98:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.50:1 |
| White text | 5.98:1 |
Values
| HEX | #6657AA |
| RGB | rgb(102, 87, 170) |
| HSL | hsl(251, 33%, 50%) |
| OKLCH | oklch(51.1% 0.128 289.4) |
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 #6657AA | 5.98:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #6657AA | 3.50:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #6657AA text on white | 5.98:1 | AA | Lc 79.8 | Fine for body text |
| #6657AA text on black | 3.50:1 | AA large text | Lc -22.1 | 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
#E9E8F5
oklch(93.6% 0.017 289.6)
-
Step 200
200
#D8D6EF
oklch(88.5% 0.034 289.4)
-
Step 300
300
#BFBBE7
oklch(81% 0.062 289.1)
-
Step 400
400
#9F96DB
oklch(70.7% 0.1 289.6)
-
Step 500
500
#887BD1
oklch(63.1% 0.127 289.2)
-
Step 600
600
#7362BE
oklch(55.6% 0.139 289.6)
-
Step 700
700 (this color)
#6657AA
oklch(51.1% 0.128 289.4)
-
Step 800
800
#4F4384
oklch(42.8% 0.105 289.7)
-
Step 900
900
#41396A
oklch(37.7% 0.082 289.4)
-
Step 950
950
#26223E
oklch(27.1% 0.051 289.1)
#6657AA 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) | #3765AD | 0.066 |
| Deuteranopia (no green cones) | #3861A8 | 0.064 |
| Tritanopia (no blue cones) | #546878 | 0.107 |
| Achromatopsia (no color) | #636363 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6657AA
#6657AA
oklch(51.1% 0.128 289.4)
- #6C6B00
#6C6B00
oklch(51.2% 0.111 109.1)
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 #6657AA, closest first.
No curated palette has a color within ΔE 0.04 of #6657AA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.041
- Slate Blue #6A5ACD ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.062
- Dusky Blue #475F94 ΔE 0.063
- Twilight #4E518B ΔE 0.065
- French Blue #436BAD ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.071
Use #6657AA 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.