#5B308E
Closest named color: Rebecca Purple (#663399). oklch(41.5% 0.149 301.1), rgb(91, 48, 142).
Aa
White text reads best on this color (9.29:1).
About this color
#5B308E is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.149 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.028 away. White text reads best on it, at 9.29:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.25:1 |
| White text | 9.29:1 |
Values
| HEX | #5B308E |
| RGB | rgb(91, 48, 142) |
| HSL | hsl(267, 49%, 37%) |
| OKLCH | oklch(41.5% 0.149 301.1) |
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 #5B308E | 9.29:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #5B308E | 2.25:1 | Fails | Lc 13.0 | Not readable |
| #5B308E text on white | 9.29:1 | AAA | Lc 91.0 | Preferred for body text |
| #5B308E text on black | 2.25:1 | Fails | Lc -11.4 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#ECE6F9
oklch(93.5% 0.026 300.3)
-
Step 200
200
#DED2F5
oklch(88.4% 0.049 301)
-
Step 300
300
#CAB4F1
oklch(80.9% 0.088 301)
-
Step 400
400
#B08AE9
oklch(70.6% 0.14 301.3)
-
Step 500
500
#9D6AE2
oklch(63.1% 0.177 301.1)
-
Step 600
600
#894ED0
oklch(55.7% 0.193 301.2)
-
Step 700
700
#743DB4
oklch(49% 0.18 301.2)
-
Step 800
800 (this color)
#5B308E
oklch(41.5% 0.149 301.1)
-
Step 900
900
#4D2F74
oklch(37.8% 0.115 301.1)
-
Step 950
950
#2D1C44
oklch(27% 0.073 301.3)
#5B308E 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) | #004691 | 0.111 |
| Deuteranopia (no green cones) | #07468C | 0.110 |
| Tritanopia (no blue cones) | #50455A | 0.113 |
| Achromatopsia (no color) | #474747 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B308E
#5B308E
oklch(41.5% 0.149 301.1)
- #445300
#445300
oklch(41.4% 0.099 120.9)
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 #5B308E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.028
- Dark Slate Blue #483D8B ΔE 0.043
- Blueberry #464196 ΔE 0.052
- Chrysanthemum #560BAD ΔE 0.070
- Imperial Purple #480CA8 ΔE 0.079
- Indigo #4B0082 ΔE 0.081
- Twilight #4E518B ΔE 0.084
- Grape #7209B7 ΔE 0.086
Use #5B308E 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.