#311F59
Closest named color: Midnight Blue (#191970). oklch(29.7% 0.1 293.7), rgb(49, 31, 89).
Aa
White text reads best on this color (14.27:1).
About this color
#311F59 is a dark, moderately saturated purple. In OKLCH its lightness is 30%, its chroma 0.100 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.062 away. White text reads best on it, at 14.27:1.
| Hue family | Purples |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.100) |
| Temperature | in between |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.47:1 |
| White text | 14.27:1 |
Values
| HEX | #311F59 |
| RGB | rgb(49, 31, 89) |
| HSL | hsl(259, 48%, 24%) |
| OKLCH | oklch(29.7% 0.1 293.7) |
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 #311F59 | 14.27:1 | AAA | Lc -103.7 | Preferred for body text |
| Black text on #311F59 | 1.47:1 | Fails | Lc 0.0 | Not readable |
| #311F59 text on white | 14.27:1 | AAA | Lc 100.7 | Preferred for body text |
| #311F59 text on black | 1.47:1 | 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
#C4B4FF
oklch(81% 0.106 293.7)
-
Step 400
400
#A788FF
oklch(70.7% 0.17 293.6)
-
Step 500
500
#9563FF
oklch(63.2% 0.221 293.9)
-
Step 600
600
#8336F9
oklch(55.5% 0.263 293.8)
-
Step 700
700
#7025D9
oklch(49.1% 0.244 294)
-
Step 800
800
#5A23B0
oklch(42.7% 0.203 293.4)
-
Step 900
900
#49258B
oklch(37.6% 0.158 293.5)
-
Step 950
950 (this color)
#311F59
oklch(29.7% 0.1 293.7)
#311F59 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) | #002B5B | 0.065 |
| Deuteranopia (no green cones) | #012958 | 0.064 |
| Tritanopia (no blue cones) | #262C38 | 0.080 |
| Achromatopsia (no color) | #2A2A2A | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311F59
#311F59
oklch(29.7% 0.1 293.7)
- #2D3000
#2D3000
oklch(29.6% 0.066 113.5)
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 #311F59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.064
- Marine #042E60 ΔE 0.065
- Prussian Blue #1D3557 ΔE 0.068
- Dark Purple #35063E ΔE 0.070
- Deep Violet #490648 ΔE 0.072
- Oxford Blue #1B263B ΔE 0.073
Use #311F59 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.