#01212F
Closest named color: Rich Black (#0D1B2A). oklch(23.3% 0.046 231.1), rgb(1, 33, 47).
Aa
White text reads best on this color (16.66:1).
About this color
#01212F is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.046 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 16.66:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.66:1 |
Values
| HEX | #01212F |
| RGB | rgb(1, 33, 47) |
| HSL | hsl(198, 96%, 9%) |
| OKLCH | oklch(23.3% 0.046 231.1) |
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 #01212F | 16.66:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #01212F | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #01212F text on white | 16.66:1 | AAA | Lc 103.4 | Preferred for body text |
| #01212F 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C6DDEA
oklch(88.4% 0.03 232.5)
-
Step 300
300
#9EC8DE
oklch(81% 0.054 231.1)
-
Step 400
400
#65ABCD
oklch(70.8% 0.086 230.8)
-
Step 500
500
#3095C0
oklch(63.1% 0.111 230.9)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#084861
oklch(37.8% 0.072 231.1)
-
Step 950
950 (this color)
#01212F
oklch(23.3% 0.046 231.1)
#01212F 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) | #1A2030 | 0.031 |
| Deuteranopia (no green cones) | #131C2F | 0.025 |
| Tritanopia (no blue cones) | #002526 | 0.026 |
| Achromatopsia (no color) | #1E1E1E | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01212F
#01212F
oklch(23.3% 0.046 231.1)
- #2E1708
#2E1708
oklch(23.3% 0.045 52.1)
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 #01212F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.035
- Oxford Blue #1B263B ΔE 0.044
- Jet #212529 ΔE 0.047
- Rich Navy #001219 ΔE 0.065
- Navy Blue #001146 ΔE 0.071
- Space Cadet #2B2D42 ΔE 0.080
- Gunmetal #293241 ΔE 0.086
Use #01212F 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.