#09182F
Closest named color: Rich Black (#0D1B2A). oklch(21% 0.05 258.7), rgb(9, 24, 47).
Aa
White text reads best on this color (17.74:1).
About this color
#09182F is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.050 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.017 away. White text reads best on it, at 17.74:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.74:1 |
Values
| HEX | #09182F |
| RGB | rgb(9, 24, 47) |
| HSL | hsl(216, 68%, 11%) |
| OKLCH | oklch(21% 0.05 258.7) |
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 #09182F | 17.74:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #09182F | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #09182F text on white | 17.74:1 | AAA | Lc 104.4 | Preferred for body text |
| #09182F text on black | 1.18:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAEF
oklch(88.4% 0.033 258.4)
-
Step 300
300
#AAC2E8
oklch(80.9% 0.06 259.5)
-
Step 400
400
#7CA2DC
oklch(70.7% 0.095 258.6)
-
Step 500
500
#5A8AD2
oklch(63.1% 0.121 258.3)
-
Step 600
600
#4072BF
oklch(55.5% 0.132 258.8)
-
Step 700
700
#325FA5
oklch(49% 0.123 259)
-
Step 800
800
#2A4E86
oklch(42.7% 0.102 259)
-
Step 900
900
#26416B
oklch(37.6% 0.08 258.9)
-
Step 950
950 (this color)
#09182F
oklch(21% 0.05 258.7)
#09182F 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) | #0E1A30 | 0.010 |
| Deuteranopia (no green cones) | #08162F | 0.007 |
| Tritanopia (no blue cones) | #001D21 | 0.039 |
| Achromatopsia (no color) | #181818 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09182F
#09182F
oklch(21% 0.05 258.7)
- #231500
#231500
oklch(20.9% 0.044 77.5)
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 #09182F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.017
- Rich Navy #001219 ΔE 0.051
- Navy Blue #001146 ΔE 0.052
- Dark #1B2431 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.060
- Jet #212529 ΔE 0.066
- Dark Navy #000435 ΔE 0.068
- Night Blue #040348 ΔE 0.073
Use #09182F 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.