#1F1638
Closest named color: Rich Black (#0D1B2A). oklch(23.2% 0.064 293), rgb(31, 22, 56).
Aa
White text reads best on this color (17.07:1).
About this color
#1F1638 is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.064 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.046 away. White text reads best on it, at 17.07:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.07:1 |
Values
| HEX | #1F1638 |
| RGB | rgb(31, 22, 56) |
| HSL | hsl(256, 44%, 15%) |
| OKLCH | oklch(23.2% 0.064 293) |
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 #1F1638 | 17.07:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #1F1638 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #1F1638 text on white | 17.07:1 | AAA | Lc 103.9 | Preferred for body text |
| #1F1638 text on black | 1.23:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F8
oklch(93.5% 0.023 294.1)
-
Step 200
200
#DAD5F3
oklch(88.6% 0.041 293.2)
-
Step 300
300
#C2B8EE
oklch(80.9% 0.076 293.1)
-
Step 400
400
#A492E5
oklch(70.8% 0.12 293)
-
Step 500
500
#8E74DD
oklch(63% 0.154 292.8)
-
Step 600
600
#795ACB
oklch(55.6% 0.168 292.7)
-
Step 700
700
#6649AF
oklch(49% 0.156 292.8)
-
Step 800
800
#533D8E
oklch(42.7% 0.129 292.6)
-
Step 900
900
#453571
oklch(37.8% 0.1 293.3)
-
Step 950
950 (this color)
#1F1638
oklch(23.2% 0.064 293)
#1F1638 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) | #081C39 | 0.038 |
| Deuteranopia (no green cones) | #0A1B37 | 0.036 |
| Tritanopia (no blue cones) | #191D24 | 0.052 |
| Achromatopsia (no color) | #1C1C1C | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1638
#1F1638
oklch(23.2% 0.064 293)
- #1E2000
#1E2000
oklch(23.3% 0.052 113.1)
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 #1F1638, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.046
- Oxford Blue #1B263B ΔE 0.051
- Dark #1B2431 ΔE 0.051
- Midnight Purple #280137 ΔE 0.052
- Very Dark Purple #2A0134 ΔE 0.054
- Dark Purple #35063E ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.059
- Navy Blue #001146 ΔE 0.061
Use #1F1638 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.