#310E57
Closest named color: Dark Indigo (#1F0954). oklch(27% 0.121 299.8), rgb(49, 14, 87).
Aa
White text reads best on this color (15.77:1).
About this color
#310E57 is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.121 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.043 away. White text reads best on it, at 15.77:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.33:1 |
| White text | 15.77:1 |
Values
| HEX | #310E57 |
| RGB | rgb(49, 14, 87) |
| HSL | hsl(269, 72%, 20%) |
| OKLCH | oklch(27% 0.121 299.8) |
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 #310E57 | 15.77:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #310E57 | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #310E57 text on white | 15.77:1 | AAA | Lc 102.1 | Preferred for body text |
| #310E57 text on black | 1.33:1 | 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
#F7F3FF
oklch(97.1% 0.016 301.2)
-
Step 100
100
#EDE5FF
oklch(93.6% 0.036 299.7)
-
Step 200
200
#DFD0FF
oklch(88.5% 0.066 299.6)
-
Step 300
300
#CBB0FF
oklch(80.9% 0.113 299.6)
-
Step 400
400
#B382FF
oklch(70.7% 0.18 299.9)
-
Step 500
500
#A259FF
oklch(63.1% 0.235 299.8)
-
Step 600
600
#930FFF
oklch(55.6% 0.291 299.8)
-
Step 700
700
#7D00DB
oklch(49.2% 0.263 299.9)
-
Step 800
800
#6600B5
oklch(42.6% 0.228 299.7)
-
Step 900
900
#540D95
oklch(37.7% 0.191 299.6)
-
Step 950
950 (this color)
#310E57
oklch(27% 0.121 299.8)
#310E57 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) | #002359 | 0.080 |
| Deuteranopia (no green cones) | #002256 | 0.080 |
| Tritanopia (no blue cones) | #282232 | 0.091 |
| Achromatopsia (no color) | #232323 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #310E57
#310E57
oklch(27% 0.121 299.8)
- #232B00
#232B00
oklch(27.2% 0.064 120)
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 #310E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.043
- Dark Purple #35063E ΔE 0.050
- Deep Purple #36013F ΔE 0.052
- Eggplant Purple #430541 ΔE 0.061
- Deep Violet #490648 ΔE 0.064
- Eggplant #380835 ΔE 0.067
- Midnight Blue #191970 ΔE 0.068
- Royal Purple #4B006E ΔE 0.068
Use #310E57 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.