#57309B
Closest named color: Rebecca Purple (#663399). oklch(42.1% 0.164 295.1), rgb(87, 48, 155).
Aa
White text reads best on this color (9.12:1).
About this color
#57309B is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.164 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.031 away. White text reads best on it, at 9.12:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #57309B |
| RGB | rgb(87, 48, 155) |
| HSL | hsl(262, 53%, 40%) |
| OKLCH | oklch(42.1% 0.164 295.1) |
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 #57309B | 9.12:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #57309B | 2.30:1 | Fails | Lc 13.6 | Not readable |
| #57309B text on white | 9.12:1 | AAA | Lc 90.4 | Preferred for body text |
| #57309B text on black | 2.30:1 | Fails | Lc -11.9 | 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
#EBE7FB
oklch(93.7% 0.027 295)
-
Step 200
200
#DBD3F9
oklch(88.5% 0.052 295)
-
Step 300
300
#C5B5F9
oklch(81% 0.096 295)
-
Step 400
400
#A88BF5
oklch(70.7% 0.153 294.8)
-
Step 500
500
#9569F1
oklch(63.1% 0.196 295.1)
-
Step 600
600
#814BE0
oklch(55.6% 0.214 295.1)
-
Step 700
700
#6D3BC2
oklch(49.1% 0.198 295)
-
Step 800
800 (this color)
#57309B
oklch(42.1% 0.164 295.1)
-
Step 900
900
#482E7D
oklch(37.7% 0.128 294.6)
-
Step 950
950
#2A1C49
oklch(27% 0.081 294.8)
#57309B 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) | #00499E | 0.103 |
| Deuteranopia (no green cones) | #004699 | 0.102 |
| Tritanopia (no blue cones) | #454A61 | 0.129 |
| Achromatopsia (no color) | #484848 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57309B
#57309B
oklch(42.1% 0.164 295.1)
- #4C5300
#4C5300
oklch(42.1% 0.096 115.2)
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 #57309B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.046
- Blueberry #464196 ΔE 0.046
- Chrysanthemum #560BAD ΔE 0.054
- Imperial Purple #480CA8 ΔE 0.063
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Grape #7209B7 ΔE 0.075
- Indigo Blue #3A18B1 ΔE 0.079
Use #57309B 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.