#63578A
Closest named color: Dusk (#4E5481). oklch(49% 0.081 294), rgb(99, 87, 138).
Aa
White text reads best on this color (6.44:1).
About this color
#63578A is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.081 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.038 away. White text reads best on it, at 6.44:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.081) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 3.26:1 |
| White text | 6.44:1 |
Values
| HEX | #63578A |
| RGB | rgb(99, 87, 138) |
| HSL | hsl(254, 23%, 44%) |
| OKLCH | oklch(49% 0.081 294) |
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 #63578A | 6.44:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #63578A | 3.26:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #63578A text on white | 6.44:1 | AA | Lc 81.9 | Fine for body text |
| #63578A text on black | 3.26:1 | AA large text | Lc -20.0 | 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
#EAE8F1
oklch(93.5% 0.012 296.3)
-
Step 200
200
#D9D7E7
oklch(88.6% 0.022 291.7)
-
Step 300
300
#C1BCD8
oklch(80.8% 0.039 293.7)
-
Step 400
400
#A29AC5
oklch(70.8% 0.063 293.3)
-
Step 500
500
#8C80B6
oklch(63.1% 0.081 294.2)
-
Step 600
600
#7669A2
oklch(55.6% 0.088 293.8)
-
Step 700
700 (this color)
#63578A
oklch(49% 0.081 294)
-
Step 800
800
#514870
oklch(42.8% 0.066 293.8)
-
Step 900
900
#433C5B
oklch(37.7% 0.053 294.1)
-
Step 950
950
#272335
oklch(26.9% 0.033 294.2)
#63578A 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) | #495F8C | 0.042 |
| Deuteranopia (no green cones) | #4B5E89 | 0.039 |
| Tritanopia (no blue cones) | #5B606A | 0.067 |
| Achromatopsia (no color) | #5E5E5E | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63578A
#63578A
oklch(49% 0.081 294)
- #60652B
#60652B
oklch(48.9% 0.081 113.5)
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 #63578A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.038
- Twilight #4E518B ΔE 0.039
- Dusty Grape #545775 ΔE 0.043
- Dusky Blue #475F94 ΔE 0.044
- Muted Purple #805B87 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.056
- Dusty Purple #825F87 ΔE 0.060
- Denim #3B638C ΔE 0.060
Use #63578A 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.