#311E59
Closest named color: Dark Indigo (#1F0954). oklch(29.5% 0.101 294.1), rgb(49, 30, 89).
Aa
White text reads best on this color (14.37:1).
About this color
#311E59 is a dark, moderately saturated purple. In OKLCH its lightness is 30%, its chroma 0.101 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.062 away. White text reads best on it, at 14.37:1.
| Hue family | Purples |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.46:1 |
| White text | 14.37:1 |
Values
| HEX | #311E59 |
| RGB | rgb(49, 30, 89) |
| HSL | hsl(259, 50%, 23%) |
| OKLCH | oklch(29.5% 0.101 294.1) |
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 #311E59 | 14.37:1 | AAA | Lc -103.8 | Preferred for body text |
| Black text on #311E59 | 1.46:1 | Fails | Lc 0.0 | Not readable |
| #311E59 text on white | 14.37:1 | AAA | Lc 100.8 | Preferred for body text |
| #311E59 text on black | 1.46:1 | 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
#EBE6FF
oklch(93.6% 0.034 294.9)
-
Step 200
200
#DBD2FF
oklch(88.5% 0.062 294.3)
-
Step 300
300
#C4B3FF
oklch(80.8% 0.107 294.1)
-
Step 400
400
#A888FF
oklch(70.7% 0.17 294)
-
Step 500
500
#9562FF
oklch(63% 0.222 294)
-
Step 600
600
#8433FB
oklch(55.5% 0.267 294)
-
Step 700
700
#7121DB
oklch(49.1% 0.248 294.2)
-
Step 800
800
#5B21B1
oklch(42.7% 0.205 293.9)
-
Step 900
900
#4A248C
oklch(37.7% 0.16 294)
-
Step 950
950 (this color)
#311E59
oklch(29.5% 0.101 294.1)
#311E59 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) | #002A5B | 0.066 |
| Deuteranopia (no green cones) | #002958 | 0.066 |
| Tritanopia (no blue cones) | #262B38 | 0.080 |
| Achromatopsia (no color) | #2A2A2A | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #311E59
#311E59
oklch(29.5% 0.101 294.1)
- #2C3000
#2C3000
oklch(29.5% 0.067 114.7)
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 #311E59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.062
- Midnight Blue #191970 ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.066
- Marine #042E60 ΔE 0.066
- Dark Purple #35063E ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.070
- Deep Violet #490648 ΔE 0.071
- Eggplant Purple #430541 ΔE 0.072
Use #311E59 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.