#05221D
Closest named color: Rich Black (#0D1B2A). oklch(22.8% 0.036 179.6), rgb(5, 34, 29).
Aa
White text reads best on this color (16.75:1).
About this color
#05221D is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.036 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.043 away. White text reads best on it, at 16.75:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.75:1 |
Values
| HEX | #05221D |
| RGB | rgb(5, 34, 29) |
| HSL | hsl(170, 74%, 8%) |
| OKLCH | oklch(22.8% 0.036 179.6) |
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 #05221D | 16.75:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #05221D | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #05221D text on white | 16.75:1 | AAA | Lc 103.5 | Preferred for body text |
| #05221D 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#C9DFD9
oklch(88.6% 0.025 177.6)
-
Step 300
300
#A4CAC1
oklch(80.9% 0.042 179.2)
-
Step 400
400
#70AFA2
oklch(70.7% 0.068 179.7)
-
Step 500
500
#449B8B
oklch(63.2% 0.087 179.4)
-
Step 600
600
#1A8575
oklch(55.6% 0.095 179.8)
-
Step 700
700
#057162
oklch(49.2% 0.089 179.2)
-
Step 800
800
#0E5C50
oklch(42.7% 0.073 179.3)
-
Step 900
900
#174B42
oklch(37.6% 0.057 179.5)
-
Step 950
950 (this color)
#05221D
oklch(22.8% 0.036 179.6)
#05221D 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) | #201F1D | 0.038 |
| Deuteranopia (no green cones) | #1C1C1D | 0.037 |
| Tritanopia (no blue cones) | #002320 | 0.007 |
| Achromatopsia (no color) | #1E1E1E | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05221D
#05221D
oklch(22.8% 0.036 179.6)
- #2A151C
#2A151C
oklch(22.8% 0.036 358.9)
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 #05221D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.048
- Dark #1B2431 ΔE 0.050
- Rich Navy #001219 ΔE 0.065
- Dark Forest Green #002D04 ΔE 0.065
- Oxford Blue #1B263B ΔE 0.066
- Very Dark Green #062E03 ΔE 0.068
- Almost Black #070D0D ΔE 0.081
Use #05221D 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.