#5A378D
Closest named color: Rebecca Purple (#663399). oklch(42.4% 0.137 299.2), rgb(90, 55, 141).
Aa
White text reads best on this color (8.87:1).
About this color
#5A378D is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.137 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.030 away. White text reads best on it, at 8.87:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.137) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.36:1 |
| White text | 8.87:1 |
Values
| HEX | #5A378D |
| RGB | rgb(90, 55, 141) |
| HSL | hsl(264, 44%, 38%) |
| OKLCH | oklch(42.4% 0.137 299.2) |
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 #5A378D | 8.87:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #5A378D | 2.36:1 | Fails | Lc 14.0 | Not readable |
| #5A378D text on white | 8.87:1 | AAA | Lc 90.0 | Fine for body text |
| #5A378D text on black | 2.36:1 | Fails | Lc -12.3 | 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
#ECE7F8
oklch(93.7% 0.023 299.4)
-
Step 200
200
#DDD3F3
oklch(88.5% 0.045 299.7)
-
Step 300
300
#C8B6EE
oklch(81% 0.08 299.3)
-
Step 400
400
#AC8DE5
oklch(70.6% 0.129 299.3)
-
Step 500
500
#996EDD
oklch(63% 0.165 299.6)
-
Step 600
600
#8454CB
oklch(55.7% 0.178 299.1)
-
Step 700
700
#7043B0
oklch(49.1% 0.167 299.2)
-
Step 800
800 (this color)
#5A378D
oklch(42.4% 0.137 299.2)
-
Step 900
900
#4A3171
oklch(37.6% 0.107 299.2)
-
Step 950
950
#2B1E42
oklch(27% 0.066 298.6)
#5A378D 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) | #044A90 | 0.103 |
| Deuteranopia (no green cones) | #19498B | 0.094 |
| Tritanopia (no blue cones) | #4F495C | 0.106 |
| Achromatopsia (no color) | #4A4A4A | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A378D
#5A378D
oklch(42.4% 0.137 299.2)
- #485500
#485500
oklch(42.3% 0.1 119.4)
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 #5A378D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.030
- Dark Slate Blue #483D8B ΔE 0.034
- Blueberry #464196 ΔE 0.042
- Twilight #4E518B ΔE 0.069
- Chrysanthemum #560BAD ΔE 0.082
- Dusk #4E5481 ΔE 0.083
- Imperial Purple #480CA8 ΔE 0.089
- Cobalt #1E488F ΔE 0.089
Use #5A378D 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.