#05211D
Closest named color: Rich Black (#0D1B2A). oklch(22.5% 0.035 182.2), rgb(5, 33, 29).
Aa
White text reads best on this color (16.91:1).
About this color
#05211D is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.035 and its hue 182°. 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 16.91:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.91:1 |
Values
| HEX | #05211D |
| RGB | rgb(5, 33, 29) |
| HSL | hsl(171, 74%, 7%) |
| OKLCH | oklch(22.5% 0.035 182.2) |
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 #05211D | 16.91:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #05211D | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #05211D text on white | 16.91:1 | AAA | Lc 103.7 | Preferred for body text |
| #05211D text on black | 1.24:1 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#CADEDA
oklch(88.5% 0.022 182.5)
-
Step 300
300
#A4CAC2
oklch(80.9% 0.042 181)
-
Step 400
400
#71AEA4
oklch(70.6% 0.065 183)
-
Step 500
500
#469A8D
oklch(63% 0.084 182)
-
Step 600
600
#1F8477
oklch(55.5% 0.091 182.2)
-
Step 700
700
#0D7064
oklch(49.1% 0.085 181.8)
-
Step 800
800
#125B52
oklch(42.6% 0.07 182.6)
-
Step 900
900
#194B44
oklch(37.7% 0.055 182.6)
-
Step 950
950 (this color)
#05211D
oklch(22.5% 0.035 182.2)
#05211D 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) | #1F1F1D | 0.036 |
| Deuteranopia (no green cones) | #1B1B1D | 0.036 |
| Tritanopia (no blue cones) | #002220 | 0.007 |
| Achromatopsia (no color) | #1D1D1D | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05211D
#05211D
oklch(22.5% 0.035 182.2)
- #29151A
#29151A
oklch(22.5% 0.034 3.9)
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 #05211D, 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 0.049
- Dark #1B2431 ΔE 0.051
- Rich Navy #001219 ΔE 0.061
- Oxford Blue #1B263B ΔE 0.067
- Dark Forest Green #002D04 ΔE 0.068
- Very Dark Green #062E03 ΔE 0.072
- Almost Black #070D0D ΔE 0.077
Use #05211D 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.