#57237A
Closest named color: Indigo (#4B0082). oklch(37.7% 0.143 308.4), rgb(87, 35, 122).
Aa
White text reads best on this color (10.89:1).
About this color
#57237A is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.143 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.055 away. White text reads best on it, at 10.89:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.92:1 |
| White text | 10.89:1 |
Values
| HEX | #57237A |
| RGB | rgb(87, 35, 122) |
| HSL | hsl(276, 55%, 31%) |
| OKLCH | oklch(37.7% 0.143 308.4) |
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 #57237A | 10.89:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #57237A | 1.92:1 | Fails | Lc 9.3 | Not readable |
| #57237A text on white | 10.89:1 | AAA | Lc 94.6 | Preferred for body text |
| #57237A text on black | 1.92:1 | Fails | Lc -8.0 | 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 900.
-
Step 50
50
#F8F3FD
oklch(97.1% 0.014 308.3)
-
Step 100
100
#F0E5FA
oklch(93.7% 0.03 309.1)
-
Step 200
200
#E4CFF8
oklch(88.5% 0.06 308.2)
-
Step 300
300
#D4AEF6
oklch(80.9% 0.107 308.2)
-
Step 400
400
#BF7FF1
oklch(70.7% 0.171 308.5)
-
Step 500
500
#AF58EC
oklch(63.1% 0.219 308.4)
-
Step 600
600
#9B34DB
oklch(55.6% 0.239 308.4)
-
Step 700
700
#8423BE
oklch(49.1% 0.223 308.2)
-
Step 800
800
#6B2199
oklch(42.6% 0.184 308.3)
-
Step 900
900 (this color)
#57237A
oklch(37.7% 0.143 308.4)
-
Step 950
950
#331648
oklch(27% 0.092 308.1)
#57237A 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) | #003B7D | 0.120 |
| Deuteranopia (no green cones) | #103D78 | 0.115 |
| Tritanopia (no blue cones) | #52364B | 0.101 |
| Achromatopsia (no color) | #3D3D3D | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57237A
#57237A
oklch(37.7% 0.143 308.4)
- #314B00
#314B00
oklch(37.7% 0.1 128.7)
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 #57237A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.055
- Royal Purple #4B006E ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.067
- Rebecca Purple #663399 ΔE 0.067
- Grape Purple #5D1451 ΔE 0.074
- Blueberry #464196 ΔE 0.083
- Plum Purple #4E0550 ΔE 0.087
- Chrysanthemum #560BAD ΔE 0.088
Use #57237A 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.