#6665BB
Closest named color: Iris (#6258C4). oklch(54.9% 0.131 281.7), rgb(102, 101, 187).
Aa
White text reads best on this color (5.06:1).
About this color
#6665BB is a medium-dark, moderately saturated purple. In OKLCH its lightness is 55%, its chroma 0.131 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.038 away. White text reads best on it, at 5.06:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 4.14:1 |
| White text | 5.06:1 |
Values
| HEX | #6665BB |
| RGB | rgb(102, 101, 187) |
| HSL | hsl(241, 39%, 56%) |
| OKLCH | oklch(54.9% 0.131 281.7) |
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 #6665BB | 5.06:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #6665BB | 4.14:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #6665BB text on white | 5.06:1 | AA | Lc 74.8 | Content text, not long reading |
| #6665BB text on black | 4.14:1 | AA large text | Lc -26.9 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D5D7EF
oklch(88.5% 0.033 281.9)
-
Step 300
300
#BABDE7
oklch(81% 0.059 281.8)
-
Step 400
400
#979ADA
oklch(70.8% 0.093 281.7)
-
Step 500
500
#7E7FD0
oklch(63% 0.121 281.8)
-
Step 600
600 (this color)
#6665BB
oklch(54.9% 0.131 281.7)
-
Step 700
700
#5755A3
oklch(49% 0.122 282.1)
-
Step 800
800
#474684
oklch(42.6% 0.101 282)
-
Step 900
900
#3B3B6A
oklch(37.6% 0.079 281.9)
-
Step 950
950
#23233E
oklch(27% 0.05 282.6)
#6665BB 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) | #4372BE | 0.051 |
| Deuteranopia (no green cones) | #3E6BB9 | 0.050 |
| Tritanopia (no blue cones) | #4A7787 | 0.113 |
| Achromatopsia (no color) | #6E6E6E | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6665BB
#6665BB
oklch(54.9% 0.131 281.7)
- #7F7300
#7F7300
oklch(54.9% 0.115 102.2)
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 #6665BB, closest first.
No curated palette has a color within ΔE 0.04 of #6665BB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.038
- Dark Periwinkle #665FD1 ΔE 0.039
- Slate Blue #6A5ACD ΔE 0.042
- Light Indigo #6D5ACF ΔE 0.044
- French Blue #436BAD ΔE 0.053
- Deep Lavender #8D5EB7 ΔE 0.063
- Windows Blue #3778BF ΔE 0.067
- Mid Blue #276AB3 ΔE 0.071
Use #6665BB 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.