#091B39
Closest named color: Rich Black (#0D1B2A). oklch(22.7% 0.063 260), rgb(9, 27, 57).
Aa
White text reads best on this color (17.10:1).
About this color
#091B39 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.063 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.030 away. White text reads best on it, at 17.10:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.10:1 |
Values
| HEX | #091B39 |
| RGB | rgb(9, 27, 57) |
| HSL | hsl(218, 73%, 13%) |
| OKLCH | oklch(22.7% 0.063 260) |
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 #091B39 | 17.10:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #091B39 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #091B39 text on white | 17.10:1 | AAA | Lc 103.8 | Preferred for body text |
| #091B39 text on black | 1.22:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A5C2F1
oklch(80.9% 0.074 260)
-
Step 400
400
#74A1EB
oklch(70.7% 0.12 260)
-
Step 500
500
#4F87E4
oklch(63% 0.153 260)
-
Step 600
600
#336FD2
oklch(55.6% 0.165 259.9)
-
Step 700
700
#265CB6
oklch(49% 0.154 260.1)
-
Step 800
800
#214C93
oklch(42.7% 0.127 259.9)
-
Step 900
900
#204076
oklch(37.8% 0.1 260.2)
-
Step 950
950 (this color)
#091B39
oklch(22.7% 0.063 260)
#091B39 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) | #0C1E3A | 0.011 |
| Deuteranopia (no green cones) | #041A38 | 0.008 |
| Tritanopia (no blue cones) | #002227 | 0.049 |
| Achromatopsia (no color) | #1C1C1C | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #091B39
#091B39
oklch(22.7% 0.063 260)
- #271900
#271900
oklch(22.6% 0.047 80.5)
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 #091B39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.030
- Navy Blue #001146 ΔE 0.043
- Dark #1B2431 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.047
- Jet #212529 ΔE 0.064
- Night Blue #040348 ΔE 0.068
- Rich Navy #001219 ΔE 0.072
- Dark Indigo #1F0954 ΔE 0.072
Use #091B39 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.