#5A378B
Closest named color: Rebecca Purple (#663399). oklch(42.2% 0.135 299.8), rgb(90, 55, 139).
Aa
White text reads best on this color (8.92:1).
About this color
#5A378B is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.135 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.033 away. White text reads best on it, at 8.92:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #5A378B |
| RGB | rgb(90, 55, 139) |
| HSL | hsl(265, 43%, 38%) |
| OKLCH | oklch(42.2% 0.135 299.8) |
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 #5A378B | 8.92:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #5A378B | 2.35:1 | Fails | Lc 13.9 | Not readable |
| #5A378B text on white | 8.92:1 | AAA | Lc 90.1 | Preferred for body text |
| #5A378B text on black | 2.35:1 | Fails | Lc -12.2 | Not readable |
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 800.
-
Step 50
50
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE7F7
oklch(93.7% 0.022 300.2)
-
Step 200
200
#DDD3F3
oklch(88.5% 0.045 299.7)
-
Step 300
300
#C8B6ED
oklch(81% 0.079 299.6)
-
Step 400
400
#AD8EE3
oklch(70.8% 0.125 300)
-
Step 500
500
#996FDB
oklch(63.1% 0.16 299.8)
-
Step 600
600
#8454C9
oklch(55.5% 0.176 299.6)
-
Step 700
700
#7044AE
oklch(49.1% 0.163 299.5)
-
Step 800
800 (this color)
#5A378B
oklch(42.2% 0.135 299.8)
-
Step 900
900
#4B3270
oklch(37.8% 0.104 300.1)
-
Step 950
950
#2C1E42
oklch(27.1% 0.066 300)
#5A378B 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) | #0A498E | 0.101 |
| Deuteranopia (no green cones) | #1C4989 | 0.093 |
| Tritanopia (no blue cones) | #50485B | 0.102 |
| Achromatopsia (no color) | #4A4A4A | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A378B
#5A378B
oklch(42.2% 0.135 299.8)
- #475500
#475500
oklch(42.2% 0.1 120)
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 #5A378B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.033
- Dark Slate Blue #483D8B ΔE 0.034
- Blueberry #464196 ΔE 0.043
- Twilight #4E518B ΔE 0.068
- Dusk #4E5481 ΔE 0.082
- Chrysanthemum #560BAD ΔE 0.084
- Cobalt #1E488F ΔE 0.089
- Imperial Purple #480CA8 ΔE 0.091
Use #5A378B 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.