#37256B
Closest named color: Midnight Blue (#191970). oklch(32.9% 0.116 290.4), rgb(55, 37, 107).
Aa
White text reads best on this color (12.80:1).
About this color
#37256B is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.116 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.063 away. White text reads best on it, at 12.80:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.63:1 |
| White text | 12.80:1 |
Values
| HEX | #37256B |
| RGB | rgb(55, 37, 107) |
| HSL | hsl(255, 49%, 28%) |
| OKLCH | oklch(32.9% 0.116 290.4) |
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 #37256B | 12.80:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #37256B | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #37256B text on white | 12.80:1 | AAA | Lc 98.6 | Preferred for body text |
| #37256B text on black | 1.63:1 | Fails | Lc 0.0 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FA
oklch(93.5% 0.026 290.7)
-
Step 200
200
#D8D4F8
oklch(88.4% 0.049 290.4)
-
Step 300
300
#C0B7F5
oklch(80.8% 0.087 291)
-
Step 400
400
#A190F1
oklch(70.8% 0.139 290.4)
-
Step 500
500
#8B71EC
oklch(63.2% 0.178 290.1)
-
Step 600
600
#7755DA
oklch(55.6% 0.194 290.4)
-
Step 700
700
#6444BD
oklch(49% 0.181 290.3)
-
Step 800
800
#523999
oklch(42.7% 0.15 290.7)
-
Step 900
900 (this color)
#37256B
oklch(32.9% 0.116 290.4)
-
Step 950
950
#271E47
oklch(26.9% 0.074 290.7)
#37256B 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) | #00336D | 0.068 |
| Deuteranopia (no green cones) | #00306A | 0.067 |
| Tritanopia (no blue cones) | #273544 | 0.094 |
| Achromatopsia (no color) | #323232 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37256B
#37256B
oklch(32.9% 0.116 290.4)
- #373800
#373800
oklch(32.9% 0.072 110.9)
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 #37256B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.063
- Royal Purple #4B006E ΔE 0.065
- Marine #042E60 ΔE 0.069
- Indigo #4B0082 ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.070
- Marine Blue #01386A ΔE 0.073
- Space Cadet #2B2D42 ΔE 0.083
- Plum Purple #4E0550 ΔE 0.084
Use #37256B 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.