#64639F
Closest named color: French Blue (#436BAD). oklch(52.7% 0.093 283.5), rgb(100, 99, 159).
Aa
White text reads best on this color (5.48:1).
About this color
#64639F is a medium-dark, moderately saturated purple. In OKLCH its lightness is 53%, its chroma 0.093 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.047 away. White text reads best on it, at 5.48:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.82:1 |
| White text | 5.48:1 |
Values
| HEX | #64639F |
| RGB | rgb(100, 99, 159) |
| HSL | hsl(241, 24%, 51%) |
| OKLCH | oklch(52.7% 0.093 283.5) |
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 #64639F | 5.48:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #64639F | 3.82:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #64639F text on white | 5.48:1 | AA | Lc 77.3 | Fine for body text |
| #64639F text on black | 3.82:1 | AA large text | Lc -24.4 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D7D7E9
oklch(88.5% 0.025 285.9)
-
Step 300
300
#BCBEDC
oklch(81% 0.042 282.4)
-
Step 400
400
#9A9CCA
oklch(70.8% 0.067 282.6)
-
Step 500
500
#8283BC
oklch(63.2% 0.085 282.9)
-
Step 600
600 (this color)
#64639F
oklch(52.7% 0.093 283.5)
-
Step 700
700
#5A5990
oklch(48.9% 0.087 283.5)
-
Step 800
800
#4A4975
oklch(42.6% 0.072 283.9)
-
Step 900
900
#3E3D5E
oklch(37.6% 0.056 284.8)
-
Step 950
950
#242437
oklch(26.9% 0.035 283.8)
#64639F 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) | #506BA1 | 0.033 |
| Deuteranopia (no green cones) | #4D679E | 0.032 |
| Tritanopia (no blue cones) | #546E79 | 0.080 |
| Achromatopsia (no color) | #696969 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64639F
#64639F
oklch(52.7% 0.093 283.5)
- #746D24
#746D24
oklch(52.6% 0.093 103.8)
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 #64639F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.047
- Dusky Blue #475F94 ΔE 0.047
- Dark Lavender #856798 ΔE 0.057
- Muted Purple #805B87 ΔE 0.057
- Dusty Purple #825F87 ΔE 0.059
- Muted Blue #3B719F ΔE 0.059
- Dull Blue #49759C ΔE 0.060
- Flat Blue #3C73A8 ΔE 0.060
Use #64639F 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.