#1F1543
Closest named color: Dark Indigo (#1F0954). oklch(23.9% 0.083 288.5), rgb(31, 21, 67).
Aa
White text reads best on this color (16.84:1).
About this color
#1F1543 is a very dark, moderately saturated purple. In OKLCH its lightness is 24%, its chroma 0.083 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.039 away. White text reads best on it, at 16.84:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.24:1 |
| White text | 16.84:1 |
Values
| HEX | #1F1543 |
| RGB | rgb(31, 21, 67) |
| HSL | hsl(253, 52%, 17%) |
| OKLCH | oklch(23.9% 0.083 288.5) |
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 #1F1543 | 16.84:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #1F1543 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #1F1543 text on white | 16.84:1 | AAA | Lc 103.6 | Preferred for body text |
| #1F1543 text on black | 1.24:1 | 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
#D7D4FC
oklch(88.5% 0.055 288.7)
-
Step 300
300
#BEB7FD
oklch(81% 0.098 288.6)
-
Step 400
400
#9E8EFC
oklch(70.8% 0.157 288.4)
-
Step 500
500
#896DF9
oklch(63.2% 0.2 288.5)
-
Step 600
600
#754FE8
oklch(55.6% 0.218 288.6)
-
Step 700
700
#623ECA
oklch(49.1% 0.204 288.3)
-
Step 800
800
#5035A3
oklch(42.7% 0.168 288.5)
-
Step 900
900
#423081
oklch(37.7% 0.13 288.8)
-
Step 950
950 (this color)
#1F1543
oklch(23.9% 0.083 288.5)
#1F1543 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) | #001E44 | 0.046 |
| Deuteranopia (no green cones) | #001C42 | 0.046 |
| Tritanopia (no blue cones) | #132029 | 0.069 |
| Achromatopsia (no color) | #1D1D1D | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1543
#1F1543
oklch(23.9% 0.083 288.5)
- #212100
#212100
oklch(24% 0.052 109.8)
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 #1F1543, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.039
- Midnight Purple #280137 ΔE 0.053
- Navy Blue #001146 ΔE 0.054
- Dark Purple #35063E ΔE 0.056
- Oxford Blue #1B263B ΔE 0.057
- Very Dark Purple #2A0134 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.062
- Deep Purple #36013F ΔE 0.063
Use #1F1543 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.