#03211D
Closest named color: Rich Black (#0D1B2A). oklch(22.4% 0.037 182.7), rgb(3, 33, 29).
Aa
White text reads best on this color (16.94:1).
About this color
#03211D is a very dark, muted teal or cyan. In OKLCH its lightness is 22%, its chroma 0.037 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.041 away. White text reads best on it, at 16.94:1.
| Hue family | Teals and cyans |
| Lightness | very dark (22%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.94:1 |
Values
| HEX | #03211D |
| RGB | rgb(3, 33, 29) |
| HSL | hsl(172, 83%, 7%) |
| OKLCH | oklch(22.4% 0.037 182.7) |
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 #03211D | 16.94:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #03211D | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #03211D text on white | 16.94:1 | AAA | Lc 103.7 | Preferred for body text |
| #03211D 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
#E1EDEA
oklch(93.6% 0.013 179.5)
-
Step 200
200
#C9DFDA
oklch(88.6% 0.024 180.6)
-
Step 300
300
#A3CAC3
oklch(80.9% 0.043 183.1)
-
Step 400
400
#6DAFA4
oklch(70.7% 0.07 182.5)
-
Step 500
500
#409B8E
oklch(63.1% 0.089 182.6)
-
Step 600
600
#0F8578
oklch(55.5% 0.096 182.8)
-
Step 700
700
#007165
oklch(49.2% 0.088 182.2)
-
Step 800
800
#075C53
oklch(42.7% 0.074 183.2)
-
Step 900
900
#144B44
oklch(37.5% 0.058 183.1)
-
Step 950
950 (this color)
#03211D
oklch(22.4% 0.037 182.7)
#03211D 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 | 0.039 |
| Deuteranopia (no green cones) | #1A1B1D | 0.036 |
| Tritanopia (no blue cones) | #002220 | 0.006 |
| Achromatopsia (no color) | #1D1D1D | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03211D
#03211D
oklch(22.4% 0.037 182.7)
- #2A141A
#2A141A
oklch(22.5% 0.037 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 #03211D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.041
- Jet #212529 ΔE 0.051
- Dark #1B2431 ΔE 0.052
- Rich Navy #001219 ΔE 0.060
- Oxford Blue #1B263B ΔE 0.068
- Dark Forest Green #002D04 ΔE 0.068
- Very Dark Green #062E03 ΔE 0.072
- Almost Black #070D0D ΔE 0.077
Use #03211D 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.