#00212A
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.042 219.6), rgb(0, 33, 42).
Aa
White text reads best on this color (16.78:1).
About this color
#00212A is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.042 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.025 away. White text reads best on it, at 16.78:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.78:1 |
Values
| HEX | #00212A |
| RGB | rgb(0, 33, 42) |
| HSL | hsl(193, 100%, 8%) |
| OKLCH | oklch(22.9% 0.042 219.6) |
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 #00212A | 16.78:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #00212A | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #00212A text on white | 16.78:1 | AAA | Lc 103.5 | Preferred for body text |
| #00212A text on black | 1.25:1 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C6DEE6
oklch(88.5% 0.028 219.8)
-
Step 300
300
#9EC9D7
oklch(81% 0.049 219.7)
-
Step 400
400
#65ACC2
oklch(70.6% 0.078 219.9)
-
Step 500
500
#2F97B3
oklch(63% 0.1 219.9)
-
Step 600
600
#00809C
oklch(55.5% 0.101 220.3)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#074959
oklch(37.6% 0.065 219.7)
-
Step 950
950 (this color)
#00212A
oklch(22.9% 0.042 219.6)
#00212A 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) | #1B202A | 0.034 |
| Deuteranopia (no green cones) | #161C2A | 0.030 |
| Tritanopia (no blue cones) | #002424 | 0.019 |
| Achromatopsia (no color) | #1D1D1D | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00212A
#00212A
oklch(22.9% 0.042 219.6)
- #2D150D
#2D150D
oklch(22.8% 0.042 39.1)
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 #00212A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.025
- Dark #1B2431 ΔE 0.039
- Jet #212529 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.051
- Rich Navy #001219 ΔE 0.061
- Navy Blue #001146 ΔE 0.079
- Almost Black #070D0D ΔE 0.083
- Space Cadet #2B2D42 ΔE 0.086
Use #00212A 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.