#645398
Closest named color: Twilight (#4E518B). oklch(49.1% 0.109 293.3), rgb(100, 83, 152).
Aa
White text reads best on this color (6.49:1).
About this color
#645398 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.109 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.042 away. White text reads best on it, at 6.49:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.109) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.23:1 |
| White text | 6.49:1 |
Values
| HEX | #645398 |
| RGB | rgb(100, 83, 152) |
| HSL | hsl(255, 29%, 46%) |
| OKLCH | oklch(49.1% 0.109 293.3) |
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 #645398 | 6.49:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #645398 | 3.23:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #645398 text on white | 6.49:1 | AA | Lc 82.1 | Fine for body text |
| #645398 text on black | 3.23:1 | AA large text | Lc -19.8 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F3
oklch(93.6% 0.015 294.5)
-
Step 200
200
#D9D6EB
oklch(88.5% 0.029 292.4)
-
Step 300
300
#C1BBE0
oklch(80.9% 0.052 292.6)
-
Step 400
400
#A297D1
oklch(70.7% 0.084 292.8)
-
Step 500
500
#8C7CC4
oklch(63% 0.107 293.3)
-
Step 600
600
#7764B1
oklch(55.5% 0.118 293.6)
-
Step 700
700 (this color)
#645398
oklch(49.1% 0.109 293.3)
-
Step 800
800
#52447B
oklch(42.7% 0.09 294)
-
Step 900
900
#433A63
oklch(37.7% 0.069 292.9)
-
Step 950
950
#27223A
oklch(26.9% 0.044 292.7)
#645398 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) | #3D5F9B | 0.059 |
| Deuteranopia (no green cones) | #3F5D96 | 0.057 |
| Tritanopia (no blue cones) | #58606E | 0.089 |
| Achromatopsia (no color) | #5E5E5E | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645398
#645398
oklch(49.1% 0.109 293.3)
- #616703
#616703
oklch(49.2% 0.109 113.7)
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 #645398, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.042
- Dusky Blue #475F94 ΔE 0.052
- Dusk #4E5481 ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.061
- Muted Purple #805B87 ΔE 0.064
- Dusty Grape #545775 ΔE 0.067
- Iris #6258C4 ΔE 0.069
- Blueberry #464196 ΔE 0.072
Use #645398 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.