#57366B
Closest named color: Dark Slate Blue (#483D8B). oklch(39.6% 0.094 311.5), rgb(87, 54, 107).
Aa
White text reads best on this color (9.78:1).
About this color
#57366B is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.094 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.060 away. White text reads best on it, at 9.78:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.094) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #57366B |
| RGB | rgb(87, 54, 107) |
| HSL | hsl(277, 33%, 32%) |
| OKLCH | oklch(39.6% 0.094 311.5) |
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 #57366B | 9.78:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #57366B | 2.14:1 | Fails | Lc 11.4 | Not readable |
| #57366B text on white | 9.78:1 | AAA | Lc 92.5 | Preferred for body text |
| #57366B text on black | 2.14:1 | Fails | Lc -9.9 | 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 900.
-
Step 50
50
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EEE6F4
oklch(93.5% 0.021 311.1)
-
Step 200
200
#E2D2ED
oklch(88.5% 0.04 311.7)
-
Step 300
300
#D0B4E2
oklch(80.9% 0.07 312.1)
-
Step 400
400
#B88CD4
oklch(70.8% 0.113 311.6)
-
Step 500
500
#A66DC8
oklch(63.1% 0.144 311.7)
-
Step 600
600
#9153B5
oklch(55.6% 0.157 311.5)
-
Step 700
700
#7B439C
oklch(49.1% 0.146 311.2)
-
Step 800
800
#64387E
oklch(42.7% 0.12 311.4)
-
Step 900
900 (this color)
#57366B
oklch(39.6% 0.094 311.5)
-
Step 950
950
#301D3B
oklch(27% 0.059 312.1)
#57366B 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) | #2A426D | 0.076 |
| Deuteranopia (no green cones) | #33446A | 0.068 |
| Tritanopia (no blue cones) | #553E4B | 0.065 |
| Achromatopsia (no color) | #444444 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57366B
#57366B
oklch(39.6% 0.094 311.5)
- #335013
#335013
oklch(39.4% 0.094 131.6)
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 #57366B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.060
- Blueberry #464196 ΔE 0.078
- Grape Purple #5D1451 ΔE 0.078
- Rebecca Purple #663399 ΔE 0.082
- Twilight #4E518B ΔE 0.082
- Dusk #4E5481 ΔE 0.084
- Purple Brown #673A3F ΔE 0.085
- Dusty Grape #545775 ΔE 0.091
Use #57366B 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.