#0A152F
Closest named color: Rich Black (#0D1B2A). oklch(20.2% 0.054 264.8), rgb(10, 21, 47).
Aa
White text reads best on this color (18.08:1).
About this color
#0A152F is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.054 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 18.08:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.08:1 |
Values
| HEX | #0A152F |
| RGB | rgb(10, 21, 47) |
| HSL | hsl(222, 65%, 11%) |
| OKLCH | oklch(20.2% 0.054 264.8) |
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 #0A152F | 18.08:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #0A152F | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #0A152F text on white | 18.08:1 | AAA | Lc 104.7 | Preferred for body text |
| #0A152F text on black | 1.16:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#819FE1
oklch(70.6% 0.103 265.1)
-
Step 500
500
#6286D9
oklch(63.1% 0.132 265.1)
-
Step 600
600
#496EC6
oklch(55.5% 0.143 265)
-
Step 700
700
#3A5CAB
oklch(49.1% 0.132 264.5)
-
Step 800
800
#304B8B
oklch(42.6% 0.111 264.9)
-
Step 900
900
#2B3F6F
oklch(37.6% 0.086 265.4)
-
Step 950
950 (this color)
#0A152F
oklch(20.2% 0.054 264.8)
#0A152F 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) | #081830 | 0.010 |
| Deuteranopia (no green cones) | #04142E | 0.010 |
| Tritanopia (no blue cones) | #001B1F | 0.046 |
| Achromatopsia (no color) | #161616 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A152F
#0A152F
oklch(20.2% 0.054 264.8)
- #1F1500
#1F1500
oklch(20.3% 0.042 86.2)
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 #0A152F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Navy Blue #001146 ΔE 0.049
- Rich Navy #001219 ΔE 0.050
- Dark Navy #000435 ΔE 0.059
- Dark #1B2431 ΔE 0.062
- Night Blue #040348 ΔE 0.067
- Oxford Blue #1B263B ΔE 0.068
- Dark Navy Blue #00022E ΔE 0.069
Use #0A152F 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.