#00212D
Closest named color: Rich Black (#0D1B2A). oklch(23.1% 0.044 226.4), rgb(0, 33, 45).
Aa
White text reads best on this color (16.72:1).
About this color
#00212D is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.044 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 16.72:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.72:1 |
Values
| HEX | #00212D |
| RGB | rgb(0, 33, 45) |
| HSL | hsl(196, 100%, 9%) |
| OKLCH | oklch(23.1% 0.044 226.4) |
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 #00212D | 16.72:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #00212D | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #00212D text on white | 16.72:1 | AAA | Lc 103.4 | Preferred for body text |
| #00212D 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C6DEE8
oklch(88.6% 0.029 224.7)
-
Step 300
300
#9DC8DB
oklch(80.8% 0.053 226.7)
-
Step 400
400
#64ACC9
oklch(70.8% 0.084 226.1)
-
Step 500
500
#2D96BB
oklch(63.1% 0.107 226.4)
-
Step 600
600
#007FA3
oklch(55.6% 0.107 226.4)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#005771
oklch(42.6% 0.082 226.6)
-
Step 900
900
#05495E
oklch(37.8% 0.07 225.8)
-
Step 950
950 (this color)
#00212D
oklch(23.1% 0.044 226.4)
#00212D 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) | #1A202E | 0.032 |
| Deuteranopia (no green cones) | #141C2D | 0.028 |
| Tritanopia (no blue cones) | #002425 | 0.022 |
| Achromatopsia (no color) | #1E1E1E | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00212D
#00212D
oklch(23.1% 0.044 226.4)
- #2E160A
#2E160A
oklch(23.1% 0.044 46.3)
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 #00212D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.047
- Jet #212529 ΔE 0.047
- Rich Navy #001219 ΔE 0.063
- Navy Blue #001146 ΔE 0.074
- Space Cadet #2B2D42 ΔE 0.083
- Almost Black #070D0D ΔE 0.086
Use #00212D 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.