#09212B
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.035 228.5), rgb(9, 33, 43).
Aa
White text reads best on this color (16.61:1).
About this color
#09212B is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.035 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 16.61:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.61:1 |
Values
| HEX | #09212B |
| RGB | rgb(9, 33, 43) |
| HSL | hsl(198, 65%, 10%) |
| OKLCH | oklch(23.4% 0.035 228.5) |
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 #09212B | 16.61:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #09212B | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #09212B text on white | 16.61:1 | AAA | Lc 103.4 | Preferred for body text |
| #09212B text on black | 1.26:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADCE5
oklch(88.4% 0.023 229.1)
-
Step 300
300
#A6C6D6
oklch(80.8% 0.041 229.5)
-
Step 400
400
#74A9C2
oklch(70.7% 0.067 229.1)
-
Step 500
500
#4C94B2
oklch(63.2% 0.085 227.6)
-
Step 600
600
#2A7D9E
oklch(55.5% 0.093 228.7)
-
Step 700
700
#1B6A87
oklch(49.2% 0.086 227.8)
-
Step 800
800
#1A566E
oklch(42.7% 0.072 228.9)
-
Step 900
900
#1D4759
oklch(37.7% 0.056 229)
-
Step 950
950 (this color)
#09212B
oklch(23.4% 0.035 228.5)
#09212B 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) | #1C202C | 0.026 |
| Deuteranopia (no green cones) | #171D2B | 0.022 |
| Tritanopia (no blue cones) | #002424 | 0.022 |
| Achromatopsia (no color) | #1E1E1E | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09212B
#09212B
oklch(23.4% 0.035 228.5)
- #2B190F
#2B190F
oklch(23.5% 0.034 49.5)
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 #09212B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Dark #1B2431 ΔE 0.029
- Jet #212529 ΔE 0.039
- Oxford Blue #1B263B ΔE 0.042
- Rich Navy #001219 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.078
- Navy Blue #001146 ΔE 0.079
- Gunmetal #293241 ΔE 0.083
Use #09212B 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.