#00211D
Closest named color: Rich Black (#0D1B2A). oklch(22.3% 0.04 183.4), rgb(0, 33, 29).
Aa
White text reads best on this color (17.00:1).
About this color
#00211D is a very dark, muted teal or cyan. In OKLCH its lightness is 22%, its chroma 0.040 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.042 away. White text reads best on it, at 17.00:1.
| Hue family | Teals and cyans |
| Lightness | very dark (22%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.00:1 |
Values
| HEX | #00211D |
| RGB | rgb(0, 33, 29) |
| HSL | hsl(173, 100%, 6%) |
| OKLCH | oklch(22.3% 0.04 183.4) |
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 #00211D | 17.00:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #00211D | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #00211D text on white | 17.00:1 | AAA | Lc 103.7 | Preferred for body text |
| #00211D text on black | 1.23:1 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C7DFDB
oklch(88.5% 0.026 184.7)
-
Step 300
300
#A0CBC4
oklch(80.9% 0.046 184.1)
-
Step 400
400
#68B0A5
oklch(70.7% 0.075 183.3)
-
Step 500
500
#349C8F
oklch(63% 0.096 183.4)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#0B4C45
oklch(37.6% 0.062 183.9)
-
Step 950
950 (this color)
#00211D
oklch(22.3% 0.04 183.4)
#00211D 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) | #1F1E1D | 0.043 |
| Deuteranopia (no green cones) | #1A1B1D | 0.039 |
| Tritanopia (no blue cones) | #002220 | 0.006 |
| Achromatopsia (no color) | #1C1C1C | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00211D
#00211D
oklch(22.3% 0.04 183.4)
- #2A1319
#2A1319
oklch(22.2% 0.039 4)
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 #00211D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.042
- Jet #212529 ΔE 0.054
- Dark #1B2431 ΔE 0.055
- Rich Navy #001219 ΔE 0.059
- Dark Forest Green #002D04 ΔE 0.068
- Oxford Blue #1B263B ΔE 0.070
- Very Dark Green #062E03 ΔE 0.072
- Almost Black #070D0D ΔE 0.076
Use #00211D 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.