#15163B
Closest named color: Rich Black (#0D1B2A). oklch(22.4% 0.07 278), rgb(21, 22, 59).
Aa
White text reads best on this color (17.35:1).
About this color
#15163B is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.070 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.042 away. White text reads best on it, at 17.35:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.35:1 |
Values
| HEX | #15163B |
| RGB | rgb(21, 22, 59) |
| HSL | hsl(238, 48%, 16%) |
| OKLCH | oklch(22.4% 0.07 278) |
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 #15163B | 17.35:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #15163B | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #15163B text on white | 17.35:1 | AAA | Lc 104.1 | Preferred for body text |
| #15163B text on black | 1.20:1 | 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
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B4BCF6
oklch(80.9% 0.082 278.3)
-
Step 400
400
#8E97F2
oklch(70.7% 0.133 278.1)
-
Step 500
500
#747AED
oklch(63% 0.17 278.1)
-
Step 600
600
#5E60DB
oklch(55.5% 0.184 277.9)
-
Step 700
700
#4E4FBE
oklch(49.1% 0.17 277.7)
-
Step 800
800
#40419A
oklch(42.7% 0.142 278.1)
-
Step 900
900
#36387A
oklch(37.7% 0.11 278.4)
-
Step 950
950 (this color)
#15163B
oklch(22.4% 0.07 278)
#15163B 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) | #021C3C | 0.028 |
| Deuteranopia (no green cones) | #00193A | 0.029 |
| Tritanopia (no blue cones) | #031E25 | 0.061 |
| Achromatopsia (no color) | #1A1A1A | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15163B
#15163B
oklch(22.4% 0.07 278)
- #211B00
#211B00
oklch(22.2% 0.046 97.7)
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 #15163B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.042
- Navy Blue #001146 ΔE 0.042
- Oxford Blue #1B263B ΔE 0.055
- Dark Indigo #1F0954 ΔE 0.055
- Dark #1B2431 ΔE 0.056
- Night Blue #040348 ΔE 0.062
- Midnight Purple #280137 ΔE 0.062
- Very Dark Purple #2A0134 ΔE 0.066
Use #15163B 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.