#181641
Closest named color: Navy Blue (#001146). oklch(23.2% 0.079 280.4), rgb(24, 22, 65).
Aa
White text reads best on this color (17.07:1).
About this color
#181641 is a very dark, moderately saturated purple. In OKLCH its lightness is 23%, its chroma 0.079 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.042 away. White text reads best on it, at 17.07:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.22:1 |
| White text | 17.07:1 |
Values
| HEX | #181641 |
| RGB | rgb(24, 22, 65) |
| HSL | hsl(243, 49%, 17%) |
| OKLCH | oklch(23.2% 0.079 280.4) |
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 #181641 | 17.07:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #181641 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #181641 text on white | 17.07:1 | AAA | Lc 103.8 | Preferred for body text |
| #181641 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E6E8FC
oklch(93.5% 0.027 281.3)
-
Step 200
200
#D2D6FC
oklch(88.5% 0.052 280.5)
-
Step 300
300
#B5BAFC
oklch(80.9% 0.093 280.7)
-
Step 400
400
#9094FB
oklch(70.8% 0.149 280.2)
-
Step 500
500
#7875F9
oklch(63.2% 0.192 280.4)
-
Step 600
600
#6359E8
oklch(55.7% 0.208 280.3)
-
Step 700
700
#5347C9
oklch(49% 0.194 280.7)
-
Step 800
800
#433CA3
oklch(42.7% 0.16 280.2)
-
Step 900
900
#383581
oklch(37.8% 0.124 280.4)
-
Step 950
950 (this color)
#181641
oklch(23.2% 0.079 280.4)
#181641 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) | #001D42 | 0.034 |
| Deuteranopia (no green cones) | #001A40 | 0.033 |
| Tritanopia (no blue cones) | #052028 | 0.068 |
| Achromatopsia (no color) | #1C1C1C | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181641
#181641
oklch(23.2% 0.079 280.4)
- #231E00
#231E00
oklch(23.4% 0.049 100.5)
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 #181641, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.042
- Dark Indigo #1F0954 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.053
- Oxford Blue #1B263B ΔE 0.055
- Dark #1B2431 ΔE 0.060
- Midnight Purple #280137 ΔE 0.061
- Night Blue #040348 ΔE 0.062
- Very Dark Purple #2A0134 ΔE 0.065
Use #181641 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.