#1F1643
Closest named color: Dark Indigo (#1F0954). oklch(24.1% 0.081 287.9), rgb(31, 22, 67).
Aa
White text reads best on this color (16.74:1).
About this color
#1F1643 is a very dark, moderately saturated purple. In OKLCH its lightness is 24%, its chroma 0.081 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.041 away. White text reads best on it, at 16.74:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.25:1 |
| White text | 16.74:1 |
Values
| HEX | #1F1643 |
| RGB | rgb(31, 22, 67) |
| HSL | hsl(252, 51%, 17%) |
| OKLCH | oklch(24.1% 0.081 287.9) |
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 #1F1643 | 16.74:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #1F1643 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #1F1643 text on white | 16.74:1 | AAA | Lc 103.5 | Preferred for body text |
| #1F1643 text on black | 1.25:1 | 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
#E8E7FC
oklch(93.5% 0.028 288)
-
Step 200
200
#D7D4FB
oklch(88.5% 0.053 288.8)
-
Step 300
300
#BDB7FC
oklch(80.9% 0.097 288)
-
Step 400
400
#9D8FFA
oklch(70.8% 0.153 287.8)
-
Step 500
500
#876EF7
oklch(63% 0.197 287.8)
-
Step 600
600
#7351E6
oklch(55.6% 0.214 287.8)
-
Step 700
700
#6140C8
oklch(49.1% 0.199 287.9)
-
Step 800
800
#4F36A2
oklch(42.7% 0.165 287.9)
-
Step 900
900
#413180
oklch(37.7% 0.128 288)
-
Step 950
950 (this color)
#1F1643
oklch(24.1% 0.081 287.9)
#1F1643 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) | #001F44 | 0.046 |
| Deuteranopia (no green cones) | #001C42 | 0.045 |
| Tritanopia (no blue cones) | #13202A | 0.066 |
| Achromatopsia (no color) | #1E1E1E | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1643
#1F1643
oklch(24.1% 0.081 287.9)
- #222100
#222100
oklch(24.1% 0.052 108.1)
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 #1F1643, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.041
- Navy Blue #001146 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.054
- Midnight Purple #280137 ΔE 0.055
- Dark Purple #35063E ΔE 0.057
- Very Dark Purple #2A0134 ΔE 0.059
- Dark #1B2431 ΔE 0.061
- Rich Black #0D1B2A ΔE 0.061
Use #1F1643 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.