#16183B
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.066 277.4), rgb(22, 24, 59).
Aa
White text reads best on this color (17.10:1).
About this color
#16183B is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.066 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 17.10:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.10:1 |
Values
| HEX | #16183B |
| RGB | rgb(22, 24, 59) |
| HSL | hsl(237, 46%, 16%) |
| OKLCH | oklch(22.9% 0.066 277.4) |
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 #16183B | 17.10:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #16183B | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #16183B text on white | 17.10:1 | AAA | Lc 103.9 | Preferred for body text |
| #16183B 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D1D7F6
oklch(88.4% 0.043 276.8)
-
Step 300
300
#B4BCF4
oklch(80.9% 0.08 278.1)
-
Step 400
400
#8E98EE
oklch(70.7% 0.126 277.6)
-
Step 500
500
#747CE8
oklch(63.1% 0.16 277.6)
-
Step 600
600
#5E62D6
oklch(55.5% 0.174 277.6)
-
Step 700
700
#4E51BA
oklch(49.2% 0.162 277.4)
-
Step 800
800
#3F4396
oklch(42.7% 0.134 277)
-
Step 900
900
#353978
oklch(37.6% 0.106 277.3)
-
Step 950
950 (this color)
#16183B
oklch(22.9% 0.066 277.4)
#16183B 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) | #061D3C | 0.024 |
| Deuteranopia (no green cones) | #031A3A | 0.026 |
| Tritanopia (no blue cones) | #052026 | 0.059 |
| Achromatopsia (no color) | #1C1C1C | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #16183B
#16183B
oklch(22.9% 0.066 277.4)
- #231D00
#231D00
oklch(23.1% 0.048 98.3)
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 #16183B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Navy Blue #001146 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.048
- Dark #1B2431 ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.058
- Midnight Purple #280137 ΔE 0.065
- Jet #212529 ΔE 0.067
- Night Blue #040348 ΔE 0.068
Use #16183B 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.