#311B5E
Closest named color: Midnight Blue (#191970). oklch(29.4% 0.113 293.3), rgb(49, 27, 94).
Aa
White text reads best on this color (14.49:1).
About this color
#311B5E is a dark, moderately saturated purple. In OKLCH its lightness is 29%, its chroma 0.113 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.055 away. White text reads best on it, at 14.49:1.
| Hue family | Purples |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.113) |
| Temperature | in between |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.44:1 |
| White text | 14.49:1 |
Values
| HEX | #311B5E |
| RGB | rgb(49, 27, 94) |
| HSL | hsl(260, 55%, 24%) |
| OKLCH | oklch(29.4% 0.113 293.3) |
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 #311B5E | 14.49:1 | AAA | Lc -103.9 | Preferred for body text |
| Black text on #311B5E | 1.44:1 | Fails | Lc 0.0 | Not readable |
| #311B5E text on white | 14.49:1 | AAA | Lc 100.9 | Preferred for body text |
| #311B5E text on black | 1.44:1 | 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 950.
-
Step 50
50
#F6F4FF
oklch(97.2% 0.015 294.5)
-
Step 100
100
#EAE6FF
oklch(93.6% 0.034 293.1)
-
Step 200
200
#DAD2FF
oklch(88.5% 0.062 293.2)
-
Step 300
300
#C3B4FF
oklch(80.9% 0.105 293.1)
-
Step 400
400
#A788FF
oklch(70.7% 0.17 293.6)
-
Step 500
500
#9464FF
oklch(63.2% 0.22 293.4)
-
Step 600
600
#8330FF
oklch(55.5% 0.273 293.2)
-
Step 700
700
#7200E7
oklch(49.1% 0.272 293.5)
-
Step 800
800
#5C0EBC
oklch(42.6% 0.228 293.2)
-
Step 900
900
#4B1C94
oklch(37.7% 0.178 293.6)
-
Step 950
950 (this color)
#311B5E
oklch(29.4% 0.113 293.3)
#311B5E 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) | #002A60 | 0.068 |
| Deuteranopia (no green cones) | #00285D | 0.068 |
| Tritanopia (no blue cones) | #242B3A | 0.088 |
| Achromatopsia (no color) | #292929 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311B5E
#311B5E
oklch(29.4% 0.113 293.3)
- #2D2F00
#2D2F00
oklch(29.3% 0.065 112.3)
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 #311B5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.055
- Dark Indigo #1F0954 ΔE 0.058
- Royal Purple #4B006E ΔE 0.067
- Marine #042E60 ΔE 0.070
- Dark Purple #35063E ΔE 0.071
- Deep Violet #490648 ΔE 0.073
- Plum Purple #4E0550 ΔE 0.074
- Eggplant Purple #430541 ΔE 0.075
Use #311B5E 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.