#5B3D9C
Closest named color: Rebecca Purple (#663399). oklch(44.5% 0.148 294.1), rgb(91, 61, 156).
Aa
White text reads best on this color (8.10:1).
About this color
#5B3D9C is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.148 and its hue 294°. 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 8.10:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.59:1 |
| White text | 8.10:1 |
Values
| HEX | #5B3D9C |
| RGB | rgb(91, 61, 156) |
| HSL | hsl(259, 44%, 43%) |
| OKLCH | oklch(44.5% 0.148 294.1) |
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 #5B3D9C | 8.10:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #5B3D9C | 2.59:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #5B3D9C text on white | 8.10:1 | AAA | Lc 87.7 | Fine for body text |
| #5B3D9C text on black | 2.59:1 | Fails | Lc -14.5 | 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
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#DAD4F7
oklch(88.6% 0.048 293.3)
-
Step 300
300
#C3B6F4
oklch(80.9% 0.087 294)
-
Step 400
400
#A68EEE
oklch(70.7% 0.139 294.1)
-
Step 500
500
#926EE8
oklch(63% 0.178 294.3)
-
Step 600
600
#7D53D6
oklch(55.6% 0.192 294)
-
Step 700
700
#6A42BA
oklch(49.1% 0.18 294.1)
-
Step 800
800 (this color)
#5B3D9C
oklch(44.5% 0.148 294.1)
-
Step 900
900
#473178
oklch(37.7% 0.116 294.4)
-
Step 950
950
#291E46
oklch(27.1% 0.072 293.7)
#5B3D9C 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) | #00519F | 0.099 |
| Deuteranopia (no green cones) | #094E9A | 0.096 |
| Tritanopia (no blue cones) | #4A5266 | 0.118 |
| Achromatopsia (no color) | #505050 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3D9C
#5B3D9C
oklch(44.5% 0.148 294.1)
- #545900
#545900
oklch(44.4% 0.099 113.5)
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 #5B3D9C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.028
- Blueberry #464196 ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.043
- Twilight #4E518B ΔE 0.063
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
- Bluey Purple #6241C7 ΔE 0.070
- Blurple #5539CC ΔE 0.078
- Chrysanthemum #560BAD ΔE 0.079
Use #5B3D9C 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.