#645F97
Closest named color: Dusky Blue (#475F94). oklch(51.4% 0.088 287), rgb(100, 95, 151).
Aa
White text reads best on this color (5.79:1).
About this color
#645F97 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 51%, its chroma 0.088 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.042 away. White text reads best on it, at 5.79:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.62:1 |
| White text | 5.79:1 |
Values
| HEX | #645F97 |
| RGB | rgb(100, 95, 151) |
| HSL | hsl(245, 23%, 48%) |
| OKLCH | oklch(51.4% 0.088 287) |
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 #645F97 | 5.79:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #645F97 | 3.62:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #645F97 text on white | 5.79:1 | AA | Lc 78.9 | Fine for body text |
| #645F97 text on black | 3.62:1 | AA large text | Lc -22.9 | 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 700.
-
Step 50
50
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F2
oklch(93.7% 0.012 286.2)
-
Step 200
200
#D8D7E8
oklch(88.5% 0.023 288.6)
-
Step 300
300
#BEBDDB
oklch(80.9% 0.042 286.9)
-
Step 400
400
#9D9BC9
oklch(70.8% 0.067 286.6)
-
Step 500
500
#8681BC
oklch(63.1% 0.088 287.5)
-
Step 600
600
#706AA8
oklch(55.6% 0.095 287.3)
-
Step 700
700 (this color)
#645F97
oklch(51.4% 0.088 287)
-
Step 800
800
#4C4875
oklch(42.6% 0.074 286.9)
-
Step 900
900
#3F3D5E
oklch(37.7% 0.056 286.2)
-
Step 950
950
#252437
oklch(27% 0.035 286.2)
#645F97 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) | #4E6799 | 0.035 |
| Deuteranopia (no green cones) | #4D6496 | 0.034 |
| Tritanopia (no blue cones) | #576974 | 0.074 |
| Achromatopsia (no color) | #656565 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645F97
#645F97
oklch(51.4% 0.088 287)
- #6D6B28
#6D6B28
oklch(51.5% 0.088 107.5)
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 #645F97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.042
- Muted Purple #805B87 ΔE 0.051
- Dusty Purple #825F87 ΔE 0.055
- French Blue #436BAD ΔE 0.056
- Twilight #4E518B ΔE 0.056
- Dusk #4E5481 ΔE 0.057
- Denim #3B638C ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.059
Use #645F97 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.