#37256D
Closest named color: Midnight Blue (#191970). oklch(33.1% 0.119 289.8), rgb(55, 37, 109).
Aa
White text reads best on this color (12.74:1).
About this color
#37256D is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.119 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.063 away. White text reads best on it, at 12.74:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.64:1 |
| White text | 12.74:1 |
Values
| HEX | #37256D |
| RGB | rgb(55, 37, 109) |
| HSL | hsl(255, 49%, 29%) |
| OKLCH | oklch(33.1% 0.119 289.8) |
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 #37256D | 12.74:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #37256D | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #37256D text on white | 12.74:1 | AAA | Lc 98.5 | Preferred for body text |
| #37256D text on black | 1.64:1 | 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
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D8D4F8
oklch(88.4% 0.049 290.4)
-
Step 300
300
#BFB7F7
oklch(80.8% 0.09 290)
-
Step 400
400
#A08FF3
oklch(70.6% 0.144 290)
-
Step 500
500
#8A70EE
oklch(63% 0.182 289.6)
-
Step 600
600
#7654DD
oklch(55.6% 0.199 289.8)
-
Step 700
700
#6443BF
oklch(49% 0.184 290.2)
-
Step 800
800
#51389B
oklch(42.6% 0.154 289.9)
-
Step 900
900 (this color)
#37256D
oklch(33.1% 0.119 289.8)
-
Step 950
950
#271E48
oklch(27% 0.075 290.3)
#37256D 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) | #00346F | 0.068 |
| Deuteranopia (no green cones) | #00316C | 0.067 |
| Tritanopia (no blue cones) | #263645 | 0.097 |
| Achromatopsia (no color) | #323232 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37256D
#37256D
oklch(33.1% 0.119 289.8)
- #383800
#383800
oklch(33% 0.072 109.8)
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 #37256D, 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
- Indigo #4B0082 ΔE 0.068
- Marine #042E60 ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.072
- Marine Blue #01386A ΔE 0.073
- Dark Slate Blue #483D8B ΔE 0.084
- Space Cadet #2B2D42 ΔE 0.086
Use #37256D 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.