#15193D
Closest named color: Rich Black (#0D1B2A). oklch(23.3% 0.068 275), rgb(21, 25, 61).
Aa
White text reads best on this color (16.95:1).
About this color
#15193D is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.068 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.041 away. White text reads best on it, at 16.95:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.95:1 |
Values
| HEX | #15193D |
| RGB | rgb(21, 25, 61) |
| HSL | hsl(234, 49%, 16%) |
| OKLCH | oklch(23.3% 0.068 275) |
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 #15193D | 16.95:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #15193D | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #15193D text on white | 16.95:1 | AAA | Lc 103.7 | Preferred for body text |
| #15193D text on black | 1.23:1 | 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
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D0D7F8
oklch(88.4% 0.046 276)
-
Step 300
300
#B1BDF5
oklch(80.9% 0.08 275.1)
-
Step 400
400
#8999F1
oklch(70.7% 0.13 274.8)
-
Step 500
500
#6E7DEC
oklch(63.1% 0.166 274.8)
-
Step 600
600
#5863DA
oklch(55.6% 0.18 274.9)
-
Step 700
700
#4951BD
oklch(49.1% 0.167 275.2)
-
Step 800
800
#3B4399
oklch(42.6% 0.139 274.9)
-
Step 900
900
#323A7A
oklch(37.8% 0.108 274.7)
-
Step 950
950 (this color)
#15193D
oklch(23.3% 0.068 275)
#15193D 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) | #061E3E | 0.022 |
| Deuteranopia (no green cones) | #021B3C | 0.024 |
| Tritanopia (no blue cones) | #012128 | 0.059 |
| Achromatopsia (no color) | #1C1C1C | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15193D
#15193D
oklch(23.3% 0.068 275)
- #251D00
#251D00
oklch(23.3% 0.048 94.4)
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 #15193D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.041
- Navy Blue #001146 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.046
- Dark #1B2431 ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.056
- Jet #212529 ΔE 0.067
- Night Blue #040348 ΔE 0.067
- Midnight Purple #280137 ΔE 0.069
Use #15193D 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.