#645891
Closest named color: Twilight (#4E518B). oklch(49.7% 0.09 292.5), rgb(100, 88, 145).
Aa
White text reads best on this color (6.27:1).
About this color
#645891 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.090 and its hue 292°. 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 6.27:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.34:1 |
| White text | 6.27:1 |
Values
| HEX | #645891 |
| RGB | rgb(100, 88, 145) |
| HSL | hsl(253, 24%, 46%) |
| OKLCH | oklch(49.7% 0.09 292.5) |
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 #645891 | 6.27:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #645891 | 3.34:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #645891 text on white | 6.27:1 | AA | Lc 81.2 | Fine for body text |
| #645891 text on black | 3.34:1 | AA large text | Lc -20.7 | 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 700.
-
Step 50
50
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#EAE8F2
oklch(93.5% 0.014 295.3)
-
Step 200
200
#D9D7E8
oklch(88.6% 0.023 291.3)
-
Step 300
300
#C1BCDB
oklch(80.9% 0.044 292.8)
-
Step 400
400
#A199C9
oklch(70.7% 0.07 292.2)
-
Step 500
500
#8B7FBB
oklch(63% 0.09 292.8)
-
Step 600
600
#7568A7
oklch(55.6% 0.097 292.4)
-
Step 700
700 (this color)
#645891
oklch(49.7% 0.09 292.5)
-
Step 800
800
#504774
oklch(42.7% 0.074 292.2)
-
Step 900
900
#423C5E
oklch(37.8% 0.058 291.5)
-
Step 950
950
#272337
oklch(27% 0.037 292.9)
#645891 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) | #486193 | 0.044 |
| Deuteranopia (no green cones) | #495F90 | 0.042 |
| Tritanopia (no blue cones) | #5A626D | 0.075 |
| Achromatopsia (no color) | #606060 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645891
#645891
oklch(49.7% 0.09 292.5)
- #636724
#636724
oklch(49.6% 0.089 112.4)
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 #645891, 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 0.044
- Dusk #4E5481 ΔE 0.045
- Muted Purple #805B87 ΔE 0.052
- Dusty Grape #545775 ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.057
- Dusty Purple #825F87 ΔE 0.060
- Denim #3B638C ΔE 0.062
Use #645891 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.