#6668AB
Closest named color: French Blue (#436BAD). oklch(54.5% 0.104 281.1), rgb(102, 104, 171).
Aa
White text reads best on this color (5.08:1).
About this color
#6668AB is a medium-dark, moderately saturated purple. In OKLCH its lightness is 55%, its chroma 0.104 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.044 away. White text reads best on it, at 5.08:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.13:1 |
| White text | 5.08:1 |
Values
| HEX | #6668AB |
| RGB | rgb(102, 104, 171) |
| HSL | hsl(238, 29%, 54%) |
| OKLCH | oklch(54.5% 0.104 281.1) |
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 #6668AB | 5.08:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #6668AB | 4.13:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #6668AB text on white | 5.08:1 | AA | Lc 75.0 | Content text, not long reading |
| #6668AB text on black | 4.13:1 | AA large text | Lc -26.7 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D6D8EA
oklch(88.6% 0.025 280.8)
-
Step 300
300
#BBBEDF
oklch(81% 0.046 281.2)
-
Step 400
400
#989CCF
oklch(70.8% 0.074 280.8)
-
Step 500
500
#7F82C2
oklch(63% 0.096 281.2)
-
Step 600
600 (this color)
#6668AB
oklch(54.5% 0.104 281.1)
-
Step 700
700
#585996
oklch(49.1% 0.097 281.5)
-
Step 800
800
#48497A
oklch(42.8% 0.08 281.5)
-
Step 900
900
#3C3D62
oklch(37.6% 0.063 281.7)
-
Step 950
950
#232439
oklch(27% 0.039 281.4)
#6668AB 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) | #5171AE | 0.034 |
| Deuteranopia (no green cones) | #4D6CA9 | 0.034 |
| Tritanopia (no blue cones) | #527581 | 0.090 |
| Achromatopsia (no color) | #6E6E6E | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6668AB
#6668AB
oklch(54.5% 0.104 281.1)
- #7D711B
#7D711B
oklch(54.4% 0.103 101)
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 #6668AB, closest first.
No curated palette has a color within ΔE 0.04 of #6668AB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.044
- Dark Lavender #856798 ΔE 0.056
- Flat Blue #3C73A8 ΔE 0.056
- Dull Blue #49759C ΔE 0.059
- Muted Blue #3B719F ΔE 0.061
- Iris #6258C4 ΔE 0.062
- Dusky Blue #475F94 ΔE 0.062
- Windows Blue #3778BF ΔE 0.065
Use #6668AB 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.