#091B2C
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.041 249), rgb(9, 27, 44).
Aa
White text reads best on this color (17.43:1).
About this color
#091B2C is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.041 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.006 away. White text reads best on it, at 17.43:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.43:1 |
Values
| HEX | #091B2C |
| RGB | rgb(9, 27, 44) |
| HSL | hsl(209, 66%, 10%) |
| OKLCH | oklch(21.7% 0.041 249) |
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 #091B2C | 17.43:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #091B2C | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #091B2C text on white | 17.43:1 | AAA | Lc 104.2 | Preferred for body text |
| #091B2C 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#A9C4DF
oklch(80.9% 0.048 248.4)
-
Step 400
400
#7AA5D0
oklch(70.7% 0.079 249)
-
Step 500
500
#578EC3
oklch(63.1% 0.099 248.8)
-
Step 600
600
#3B77B0
oklch(55.6% 0.109 249.3)
-
Step 700
700
#2D6497
oklch(49.1% 0.101 249.1)
-
Step 800
800
#26527B
oklch(42.8% 0.084 249)
-
Step 900
900
#244463
oklch(37.7% 0.066 249.2)
-
Step 950
950 (this color)
#091B2C
oklch(21.7% 0.041 249)
#091B2C 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) | #141C2D | 0.016 |
| Deuteranopia (no green cones) | #0F182C | 0.012 |
| Tritanopia (no blue cones) | #001F21 | 0.032 |
| Achromatopsia (no color) | #1A1A1A | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #091B2C
#091B2C
oklch(21.7% 0.041 249)
- #261603
#261603
oklch(21.7% 0.041 69.6)
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 #091B2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.006
- Dark #1B2431 ΔE 0.044
- Rich Navy #001219 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.053
- Jet #212529 ΔE 0.055
- Navy Blue #001146 ΔE 0.063
- Almost Black #070D0D ΔE 0.074
- Dark Navy #000435 ΔE 0.080
Use #091B2C 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.