#01232B
Closest named color: Rich Black (#0D1B2A). oklch(23.7% 0.041 216.9), rgb(1, 35, 43).
Aa
White text reads best on this color (16.45:1).
About this color
#01232B is a very dark, muted teal or cyan. In OKLCH its lightness is 24%, its chroma 0.041 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.030 away. White text reads best on it, at 16.45:1.
| Hue family | Teals and cyans |
| Lightness | very dark (24%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.45:1 |
Values
| HEX | #01232B |
| RGB | rgb(1, 35, 43) |
| HSL | hsl(191, 95%, 9%) |
| OKLCH | oklch(23.7% 0.041 216.9) |
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 #01232B | 16.45:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #01232B | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #01232B text on white | 16.45:1 | AAA | Lc 103.2 | Preferred for body text |
| #01232B text on black | 1.27:1 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C6DEE5
oklch(88.5% 0.027 217.2)
-
Step 300
300
#9EC9D5
oklch(80.9% 0.048 216.7)
-
Step 400
400
#64ADC0
oklch(70.7% 0.078 216.5)
-
Step 500
500
#2D98B1
oklch(63.1% 0.1 217.1)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#064A58
oklch(37.8% 0.065 216.6)
-
Step 950
950 (this color)
#01232B
oklch(23.7% 0.041 216.9)
#01232B 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) | #1E222B | 0.036 |
| Deuteranopia (no green cones) | #181D2B | 0.033 |
| Tritanopia (no blue cones) | #002626 | 0.017 |
| Achromatopsia (no color) | #1F1F1F | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01232B
#01232B
oklch(23.7% 0.041 216.9)
- #2F1710
#2F1710
oklch(23.7% 0.041 37.1)
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 #01232B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.030
- Dark #1B2431 ΔE 0.034
- Jet #212529 ΔE 0.042
- Oxford Blue #1B263B ΔE 0.046
- Rich Navy #001219 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.080
- Navy Blue #001146 ΔE 0.083
- Dark Forest Green #002D04 ΔE 0.084
Use #01232B 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.