#1F1340
Closest named color: Dark Indigo (#1F0954). oklch(23.2% 0.082 291), rgb(31, 19, 64).
Aa
White text reads best on this color (17.13:1).
About this color
#1F1340 is a very dark, moderately saturated purple. In OKLCH its lightness is 23%, its chroma 0.082 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.041 away. White text reads best on it, at 17.13:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.082) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.22:1 |
| White text | 17.13:1 |
Values
| HEX | #1F1340 |
| RGB | rgb(31, 19, 64) |
| HSL | hsl(256, 54%, 16%) |
| OKLCH | oklch(23.2% 0.082 291) |
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 #1F1340 | 17.13:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #1F1340 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #1F1340 text on white | 17.13:1 | AAA | Lc 103.8 | Preferred for body text |
| #1F1340 text on black | 1.22:1 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FC
oklch(93.6% 0.028 290.2)
-
Step 200
200
#D8D4FB
oklch(88.5% 0.053 290)
-
Step 300
300
#C0B6FB
oklch(80.9% 0.097 290.7)
-
Step 400
400
#A28DF9
oklch(70.8% 0.155 290.8)
-
Step 500
500
#8D6CF5
oklch(63.1% 0.197 290.8)
-
Step 600
600
#794EE4
oklch(55.5% 0.215 290.9)
-
Step 700
700
#673EC6
oklch(49.2% 0.199 291.1)
-
Step 800
800
#5334A0
oklch(42.6% 0.165 290.9)
-
Step 900
900
#442F7F
oklch(37.6% 0.129 291)
-
Step 950
950 (this color)
#1F1340
oklch(23.2% 0.082 291)
#1F1340 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) | #001C41 | 0.048 |
| Deuteranopia (no green cones) | #001B3F | 0.048 |
| Tritanopia (no blue cones) | #151D27 | 0.065 |
| Achromatopsia (no color) | #1B1B1B | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1340
#1F1340
oklch(23.2% 0.082 291)
- #1F1F00
#1F1F00
oklch(23.2% 0.05 109.8)
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 #1F1340, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.041
- Midnight Purple #280137 ΔE 0.047
- Very Dark Purple #2A0134 ΔE 0.051
- Navy Blue #001146 ΔE 0.054
- Dark Purple #35063E ΔE 0.054
- Deep Purple #36013F ΔE 0.060
- Rich Black #0D1B2A ΔE 0.061
- Oxford Blue #1B263B ΔE 0.061
Use #1F1340 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.