#1F1848
Closest named color: Dark Indigo (#1F0954). oklch(24.9% 0.086 285), rgb(31, 24, 72).
Aa
White text reads best on this color (16.37:1).
About this color
#1F1848 is a very dark, moderately saturated purple. In OKLCH its lightness is 25%, its chroma 0.086 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.037 away. White text reads best on it, at 16.37:1.
| Hue family | Purples |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.28:1 |
| White text | 16.37:1 |
Values
| HEX | #1F1848 |
| RGB | rgb(31, 24, 72) |
| HSL | hsl(249, 50%, 19%) |
| OKLCH | oklch(24.9% 0.086 285) |
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 #1F1848 | 16.37:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1F1848 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #1F1848 text on white | 16.37:1 | AAA | Lc 103.1 | Preferred for body text |
| #1F1848 text on black | 1.28:1 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E8FD
oklch(93.7% 0.028 283.7)
-
Step 200
200
#D4D5FE
oklch(88.5% 0.056 284.1)
-
Step 300
300
#B9B8FF
oklch(80.9% 0.1 284.6)
-
Step 400
400
#988FFF
oklch(70.7% 0.16 285.2)
-
Step 500
500
#816EFF
oklch(63.1% 0.207 284.7)
-
Step 600
600
#6E50EF
oklch(55.7% 0.226 285)
-
Step 700
700
#5C3FD0
oklch(49.2% 0.21 284.8)
-
Step 800
800
#4B35A8
oklch(42.7% 0.175 285.1)
-
Step 900
900
#3E3085
oklch(37.7% 0.136 285.4)
-
Step 950
950 (this color)
#1F1848
oklch(24.9% 0.086 285)
#1F1848 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) | #00214A | 0.043 |
| Deuteranopia (no green cones) | #001E47 | 0.042 |
| Tritanopia (no blue cones) | #0F232D | 0.072 |
| Achromatopsia (no color) | #202020 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F1848
#1F1848
oklch(24.9% 0.086 285)
- #252300
#252300
oklch(25% 0.054 106.5)
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 #1F1848, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.053
- Navy Blue #001146 ΔE 0.056
- Dark Purple #35063E ΔE 0.061
- Dark #1B2431 ΔE 0.063
- Midnight Purple #280137 ΔE 0.064
- Deep Purple #36013F ΔE 0.068
- Rich Black #0D1B2A ΔE 0.068
Use #1F1848 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.