#5B2B99
Closest named color: Rebecca Purple (#663399). oklch(41.7% 0.169 298.7), rgb(91, 43, 153).
Aa
White text reads best on this color (9.33:1).
About this color
#5B2B99 is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.169 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 0.028 away. White text reads best on it, at 9.33:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.169) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.25:1 |
| White text | 9.33:1 |
Values
| HEX | #5B2B99 |
| RGB | rgb(91, 43, 153) |
| HSL | hsl(266, 56%, 38%) |
| OKLCH | oklch(41.7% 0.169 298.7) |
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 #5B2B99 | 9.33:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #5B2B99 | 2.25:1 | Fails | Lc 13.1 | Not readable |
| #5B2B99 text on white | 9.33:1 | AAA | Lc 90.8 | Preferred for body text |
| #5B2B99 text on black | 2.25:1 | Fails | Lc -11.5 | 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
#ECE6FB
oklch(93.6% 0.029 298.9)
-
Step 200
200
#DDD2F9
oklch(88.5% 0.054 298.2)
-
Step 300
300
#C9B3F8
oklch(80.9% 0.098 298.8)
-
Step 400
400
#AE88F4
oklch(70.7% 0.157 298.5)
-
Step 500
500
#9C65F0
oklch(63.1% 0.201 298.7)
-
Step 600
600
#8846DF
oklch(55.6% 0.22 298.7)
-
Step 700
700
#7336C1
oklch(49% 0.203 298.6)
-
Step 800
800 (this color)
#5B2B99
oklch(41.7% 0.169 298.7)
-
Step 900
900
#4C2B7C
oklch(37.6% 0.132 298.6)
-
Step 950
950
#2D1A49
oklch(27% 0.084 299.3)
#5B2B99 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) | #00479C | 0.113 |
| Deuteranopia (no green cones) | #004697 | 0.114 |
| Tritanopia (no blue cones) | #4C465F | 0.127 |
| Achromatopsia (no color) | #474747 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B2B99
#5B2B99
oklch(41.7% 0.169 298.7)
- #475300
#475300
oklch(41.7% 0.098 118.9)
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 #5B2B99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.028
- Chrysanthemum #560BAD ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.055
- Blueberry #464196 ΔE 0.057
- Imperial Purple #480CA8 ΔE 0.063
- Grape #7209B7 ΔE 0.069
- Indigo #4B0082 ΔE 0.079
- Blue With A Hint Of Purple #533CC6 ΔE 0.082
Use #5B2B99 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.