#180D3B
Closest named color: Navy Blue (#001146). oklch(20.8% 0.084 287.8), rgb(24, 13, 59).
Aa
White text reads best on this color (18.11:1).
About this color
#180D3B is a very dark, moderately saturated purple. In OKLCH its lightness is 21%, its chroma 0.084 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.045 away. White text reads best on it, at 18.11:1.
| Hue family | Purples |
| Lightness | very dark (21%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.15:1 |
| White text | 18.11:1 |
Values
| HEX | #180D3B |
| RGB | rgb(24, 13, 59) |
| HSL | hsl(254, 64%, 14%) |
| OKLCH | oklch(20.8% 0.084 287.8) |
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 #180D3B | 18.11:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #180D3B | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #180D3B text on white | 18.11:1 | AAA | Lc 104.6 | Preferred for body text |
| #180D3B text on black | 1.15:1 | 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
#E8E7FD
oklch(93.5% 0.03 287.9)
-
Step 200
200
#D6D4FC
oklch(88.4% 0.055 287.5)
-
Step 300
300
#BDB7FD
oklch(80.9% 0.098 287.9)
-
Step 400
400
#9D8EFD
oklch(70.8% 0.159 287.8)
-
Step 500
500
#876DFA
oklch(63.1% 0.202 287.7)
-
Step 600
600
#734FE9
oklch(55.5% 0.22 287.7)
-
Step 700
700
#613ECB
oklch(49% 0.205 287.7)
-
Step 800
800
#4F35A4
oklch(42.7% 0.169 287.8)
-
Step 900
900
#413082
oklch(37.7% 0.132 287.9)
-
Step 950
950 (this color)
#180D3B
oklch(20.8% 0.084 287.8)
#180D3B 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) | #00173C | 0.043 |
| Deuteranopia (no green cones) | #00153A | 0.041 |
| Tritanopia (no blue cones) | #0B1922 | 0.070 |
| Achromatopsia (no color) | #161616 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180D3B
#180D3B
oklch(20.8% 0.084 287.8)
- #1A1900
#1A1900
oklch(20.8% 0.045 107.7)
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 #180D3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.045
- Midnight Purple #280137 ΔE 0.045
- Dark Indigo #1F0954 ΔE 0.049
- Very Dark Purple #2A0134 ΔE 0.051
- Night Blue #040348 ΔE 0.053
- Rich Black #0D1B2A ΔE 0.060
- Dark Navy #000435 ΔE 0.062
- Dark Purple #35063E ΔE 0.068
Use #180D3B 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.