#05211E
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.034 185.3), rgb(5, 33, 30).
Aa
White text reads best on this color (16.89:1).
About this color
#05211E is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.034 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 16.89:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.89:1 |
Values
| HEX | #05211E |
| RGB | rgb(5, 33, 30) |
| HSL | hsl(174, 74%, 7%) |
| OKLCH | oklch(22.6% 0.034 185.3) |
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 #05211E | 16.89:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #05211E | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #05211E text on white | 16.89:1 | AAA | Lc 103.7 | Preferred for body text |
| #05211E 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
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CADEDB
oklch(88.5% 0.022 186)
-
Step 300
300
#A4CAC4
oklch(81% 0.041 184.7)
-
Step 400
400
#71AEA6
oklch(70.7% 0.064 185.4)
-
Step 500
500
#469A90
oklch(63.1% 0.083 184.9)
-
Step 600
600
#1E847A
oklch(55.5% 0.09 185)
-
Step 700
700
#0C7067
oklch(49.2% 0.084 185)
-
Step 800
800
#115B54
oklch(42.7% 0.069 185.3)
-
Step 900
900
#194B45
oklch(37.7% 0.054 184.3)
-
Step 950
950 (this color)
#05211E
oklch(22.6% 0.034 185.3)
#05211E 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) | #1F1F1E | 0.036 |
| Deuteranopia (no green cones) | #1B1B1E | 0.036 |
| Tritanopia (no blue cones) | #002220 | 0.006 |
| Achromatopsia (no color) | #1D1D1D | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05211E
#05211E
oklch(22.6% 0.034 185.3)
- #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 #05211E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Jet #212529 ΔE 0.048
- Dark #1B2431 ΔE 0.049
- Rich Navy #001219 ΔE 0.060
- Oxford Blue #1B263B ΔE 0.065
- Dark Forest Green #002D04 ΔE 0.070
- Very Dark Green #062E03 ΔE 0.073
- Almost Black #070D0D ΔE 0.077
Use #05211E 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.