#57438B
Closest named color: Dark Slate Blue (#483D8B). oklch(44% 0.115 293.9), rgb(87, 67, 139).
Aa
White text reads best on this color (8.13:1).
About this color
#57438B is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.115 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.032 away. White text reads best on it, at 8.13:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.115) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.58:1 |
| White text | 8.13:1 |
Values
| HEX | #57438B |
| RGB | rgb(87, 67, 139) |
| HSL | hsl(257, 35%, 40%) |
| OKLCH | oklch(44% 0.115 293.9) |
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 #57438B | 8.13:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #57438B | 2.58:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #57438B text on white | 8.13:1 | AAA | Lc 88.0 | Fine for body text |
| #57438B text on black | 2.58:1 | Fails | Lc -14.2 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#DAD5F0
oklch(88.5% 0.037 294.1)
-
Step 300
300
#C2B9E9
oklch(80.9% 0.068 293.4)
-
Step 400
400
#A493DD
oklch(70.6% 0.108 294)
-
Step 500
500
#8F77D4
oklch(63.2% 0.138 294)
-
Step 600
600
#7A5EC1
oklch(55.7% 0.149 294.1)
-
Step 700
700
#674DA7
oklch(49.2% 0.139 294)
-
Step 800
800 (this color)
#57438B
oklch(44% 0.115 293.9)
-
Step 900
900
#45366C
oklch(37.6% 0.09 294.4)
-
Step 950
950
#28203F
oklch(26.9% 0.057 294.1)
#57438B 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) | #27508E | 0.069 |
| Deuteranopia (no green cones) | #2B4E89 | 0.066 |
| Tritanopia (no blue cones) | #4A5160 | 0.093 |
| Achromatopsia (no color) | #4F4F4F | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57438B
#57438B
oklch(44% 0.115 293.9)
- #525800
#525800
oklch(44% 0.099 114.3)
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 #57438B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.035
- Twilight #4E518B ΔE 0.039
- Rebecca Purple #663399 ΔE 0.050
- Dusk #4E5481 ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.072
- Dusk Blue #26538D ΔE 0.073
- Dusty Grape #545775 ΔE 0.074
Use #57438B 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.