#001C21
Closest named color: Rich Black (#0D1B2A). oklch(20.8% 0.036 210.8), rgb(0, 28, 33).
Aa
White text reads best on this color (17.67:1).
About this color
#001C21 is a very dark, muted teal or cyan. In OKLCH its lightness is 21%, its chroma 0.036 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 17.67:1.
| Hue family | Teals and cyans |
| Lightness | very dark (21%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.67:1 |
Values
| HEX | #001C21 |
| RGB | rgb(0, 28, 33) |
| HSL | hsl(189, 100%, 6%) |
| OKLCH | oklch(20.8% 0.036 210.8) |
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 #001C21 | 17.67:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #001C21 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #001C21 text on white | 17.67:1 | AAA | Lc 104.3 | Preferred for body text |
| #001C21 text on black | 1.18:1 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE2
oklch(88.5% 0.024 209.8)
-
Step 300
300
#A2C9D0
oklch(81% 0.042 209.7)
-
Step 400
400
#6CACB9
oklch(70.6% 0.068 211.9)
-
Step 500
500
#3E98A7
oklch(63.2% 0.087 210.2)
-
Step 600
600
#098293
oklch(55.7% 0.095 211)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#035965
oklch(42.6% 0.073 210.7)
-
Step 900
900
#134A53
oklch(37.8% 0.057 210.7)
-
Step 950
950 (this color)
#001C21
oklch(20.8% 0.036 210.8)
#001C21 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) | #181A21 | 0.034 |
| Deuteranopia (no green cones) | #131721 | 0.030 |
| Tritanopia (no blue cones) | #001E1E | 0.011 |
| Achromatopsia (no color) | #181818 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001C21
#001C21
oklch(20.8% 0.036 210.8)
- #26110D
#26110D
oklch(20.7% 0.036 31.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #001C21
These curated palettes and gradients contain exactly #001C21. Open one to see the full color scheme around it.
Palettes
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Rich Navy #001219 ΔE 0.039
- Dark #1B2431 ΔE 0.057
- Almost Black #070D0D ΔE 0.061
- Jet #212529 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.071
- Navy Blue #001146 ΔE 0.085
- Dark Forest Green #002D04 ΔE 0.091
Use #001C21 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.