#0F173B
Closest named color: Navy Blue (#001146). oklch(22.2% 0.07 270.3), rgb(15, 23, 59).
Aa
White text reads best on this color (17.41:1).
About this color
#0F173B is a very dark, moderately saturated blue. In OKLCH its lightness is 22%, its chroma 0.070 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.036 away. White text reads best on it, at 17.41:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.20:1 |
| White text | 17.41:1 |
Values
| HEX | #0F173B |
| RGB | rgb(15, 23, 59) |
| HSL | hsl(229, 59%, 15%) |
| OKLCH | oklch(22.2% 0.07 270.3) |
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 #0F173B | 17.41:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #0F173B | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #0F173B text on white | 17.41:1 | AAA | Lc 104.1 | Preferred for body text |
| #0F173B 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ACBFF7
oklch(81% 0.082 270)
-
Step 400
400
#819BF3
oklch(70.7% 0.132 270.3)
-
Step 500
500
#637FEF
oklch(63% 0.17 270.3)
-
Step 600
600
#4C66DD
oklch(55.6% 0.183 270.1)
-
Step 700
700
#3E53C0
oklch(49% 0.172 270.5)
-
Step 800
800
#33459B
oklch(42.7% 0.141 270.4)
-
Step 900
900
#2C3B7C
oklch(37.7% 0.111 270.5)
-
Step 950
950 (this color)
#0F173B
oklch(22.2% 0.07 270.3)
#0F173B 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) | #031C3C | 0.019 |
| Deuteranopia (no green cones) | #00183A | 0.019 |
| Tritanopia (no blue cones) | #001F26 | 0.057 |
| Achromatopsia (no color) | #1A1A1A | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F173B
#0F173B
oklch(22.2% 0.07 270.3)
- #231A00
#231A00
oklch(22.2% 0.045 91.1)
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 #0F173B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.038
- Oxford Blue #1B263B ΔE 0.056
- Dark #1B2431 ΔE 0.057
- Night Blue #040348 ΔE 0.059
- Dark Indigo #1F0954 ΔE 0.060
- Dark Navy #000435 ΔE 0.067
- Midnight Purple #280137 ΔE 0.071
Use #0F173B 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.