#5B2C88
Closest named color: Rebecca Purple (#663399). oklch(40.5% 0.148 303.9), rgb(91, 44, 136).
Aa
White text reads best on this color (9.71:1).
About this color
#5B2C88 is a dark, vivid purple. In OKLCH its lightness is 40%, its chroma 0.148 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.038 away. White text reads best on it, at 9.71:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.16:1 |
| White text | 9.71:1 |
Values
| HEX | #5B2C88 |
| RGB | rgb(91, 44, 136) |
| HSL | hsl(271, 51%, 35%) |
| OKLCH | oklch(40.5% 0.148 303.9) |
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 #5B2C88 | 9.71:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #5B2C88 | 2.16:1 | Fails | Lc 12.0 | Not readable |
| #5B2C88 text on white | 9.71:1 | AAA | Lc 92.0 | Preferred for body text |
| #5B2C88 text on black | 2.16:1 | Fails | Lc -10.4 | 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
#EDE6F8
oklch(93.6% 0.025 303.5)
-
Step 200
200
#E0D2F4
oklch(88.6% 0.048 304.1)
-
Step 300
300
#CCB3EF
oklch(80.8% 0.087 303.5)
-
Step 400
400
#B389E6
oklch(70.6% 0.138 303.9)
-
Step 500
500
#A169DF
oklch(63.2% 0.176 303.7)
-
Step 600
600
#8D4CCC
oklch(55.6% 0.192 304.2)
-
Step 700
700
#783CB1
oklch(49.1% 0.179 304.1)
-
Step 800
800 (this color)
#5B2C88
oklch(40.5% 0.148 303.9)
-
Step 900
900
#4F2E72
oklch(37.7% 0.115 303.8)
-
Step 950
950
#2E1C43
oklch(27% 0.072 303.2)
#5B2C88 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) | #00438B | 0.116 |
| Deuteranopia (no green cones) | #0D4486 | 0.112 |
| Tritanopia (no blue cones) | #524056 | 0.107 |
| Achromatopsia (no color) | #444444 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B2C88
#5B2C88
oklch(40.5% 0.148 303.9)
- #3E5100
#3E5100
oklch(40.4% 0.1 123.7)
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 #5B2C88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.049
- Blueberry #464196 ΔE 0.061
- Indigo #4B0082 ΔE 0.073
- Chrysanthemum #560BAD ΔE 0.074
- Imperial Purple #480CA8 ΔE 0.081
- Purple #800080 ΔE 0.086
- Royal Purple #4B006E ΔE 0.088
Use #5B2C88 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.