#01231D
Closest named color: Rich Black (#0D1B2A). oklch(23% 0.041 178.5), rgb(1, 35, 29).
Aa
White text reads best on this color (16.67:1).
About this color
#01231D is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.041 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.047 away. White text reads best on it, at 16.67:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.67:1 |
Values
| HEX | #01231D |
| RGB | rgb(1, 35, 29) |
| HSL | hsl(169, 94%, 7%) |
| OKLCH | oklch(23% 0.041 178.5) |
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 #01231D | 16.67:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #01231D | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #01231D text on white | 16.67:1 | AAA | Lc 103.4 | Preferred for body text |
| #01231D 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDEA
oklch(93.6% 0.013 179.5)
-
Step 200
200
#C7DFD9
oklch(88.4% 0.027 179)
-
Step 300
300
#A0CBC1
oklch(80.8% 0.048 179.2)
-
Step 400
400
#67B1A1
oklch(70.7% 0.078 178.4)
-
Step 500
500
#349D8A
oklch(63.1% 0.099 178.5)
-
Step 600
600
#008674
oklch(55.5% 0.101 178.9)
-
Step 700
700
#007161
oklch(49.1% 0.09 178.4)
-
Step 800
800
#005D4F
oklch(42.8% 0.079 177.8)
-
Step 900
900
#0B4D42
oklch(37.8% 0.065 178.2)
-
Step 950
950 (this color)
#01231D
oklch(23% 0.041 178.5)
#01231D 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) | #21201D | 0.043 |
| Deuteranopia (no green cones) | #1C1D1D | 0.040 |
| Tritanopia (no blue cones) | #002421 | 0.007 |
| Achromatopsia (no color) | #1E1E1E | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01231D
#01231D
oklch(23% 0.041 178.5)
- #2C141D
#2C141D
oklch(22.9% 0.041 357)
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 #01231D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.047
- Jet #212529 ΔE 0.050
- Dark #1B2431 ΔE 0.053
- Dark Forest Green #002D04 ΔE 0.061
- Very Dark Green #062E03 ΔE 0.065
- Rich Navy #001219 ΔE 0.067
- Oxford Blue #1B263B ΔE 0.068
- Dark Brown #341C02 ΔE 0.084
Use #01231D 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.