#645598
Closest named color: Twilight (#4E518B). oklch(49.5% 0.105 292.4), rgb(100, 85, 152).
Aa
White text reads best on this color (6.37:1).
About this color
#645598 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.105 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.043 away. White text reads best on it, at 6.37:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.29:1 |
| White text | 6.37:1 |
Values
| HEX | #645598 |
| RGB | rgb(100, 85, 152) |
| HSL | hsl(253, 28%, 46%) |
| OKLCH | oklch(49.5% 0.105 292.4) |
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 #645598 | 6.37:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #645598 | 3.29:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #645598 text on white | 6.37:1 | AA | Lc 81.6 | Fine for body text |
| #645598 text on black | 3.29:1 | AA large text | Lc -20.3 | 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
#C1BBDF
oklch(80.9% 0.051 292.9)
-
Step 400
400
#A298D0
oklch(70.9% 0.081 292.4)
-
Step 500
500
#8B7DC3
oklch(63% 0.104 292.3)
-
Step 600
600
#7665AF
oklch(55.5% 0.113 292.9)
-
Step 700
700 (this color)
#645598
oklch(49.5% 0.105 292.4)
-
Step 800
800
#51457A
oklch(42.7% 0.087 292.8)
-
Step 900
900
#433A62
oklch(37.6% 0.068 293.2)
-
Step 950
950
#27223A
oklch(26.9% 0.044 292.7)
#645598 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) | #40609A | 0.055 |
| Deuteranopia (no green cones) | #415E96 | 0.053 |
| Tritanopia (no blue cones) | #58626F | 0.087 |
| Achromatopsia (no color) | #5F5F5F | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645598
#645598
oklch(49.5% 0.105 292.4)
- #63670C
#63670C
oklch(49.4% 0.105 112.4)
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 #645598, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.043
- Dusky Blue #475F94 ΔE 0.049
- Dusk #4E5481 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.060
- Muted Purple #805B87 ΔE 0.061
- Dusty Grape #545775 ΔE 0.065
- Dusty Purple #825F87 ΔE 0.069
- Iris #6258C4 ΔE 0.069
Use #645598 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.