#01152B
Closest named color: Rich Black (#0D1B2A). oklch(19.3% 0.053 250.8), rgb(1, 21, 43).
Aa
White text reads best on this color (18.36:1).
About this color
#01152B is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.053 and its hue 251°. 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 18.36:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.36:1 |
Values
| HEX | #01152B |
| RGB | rgb(1, 21, 43) |
| HSL | hsl(211, 95%, 9%) |
| OKLCH | oklch(19.3% 0.053 250.8) |
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 #01152B | 18.36:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #01152B | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #01152B text on white | 18.36:1 | AAA | Lc 104.8 | Preferred for body text |
| #01152B text on black | 1.14:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A3C4E8
oklch(80.8% 0.062 250.8)
-
Step 400
400
#70A5DD
oklch(70.7% 0.1 250.7)
-
Step 500
500
#488DD4
oklch(63.1% 0.128 251.1)
-
Step 600
600
#2676C1
oklch(55.6% 0.139 250.8)
-
Step 700
700
#1763A7
oklch(49.2% 0.129 250.8)
-
Step 800
800
#175187
oklch(42.8% 0.107 250.7)
-
Step 900
900
#1A436C
oklch(37.6% 0.084 251.1)
-
Step 950
950 (this color)
#01152B
oklch(19.3% 0.053 250.8)
#01152B 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) | #0A172C | 0.016 |
| Deuteranopia (no green cones) | #03122B | 0.010 |
| Tritanopia (no blue cones) | #001A1D | 0.038 |
| Achromatopsia (no color) | #141414 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01152B
#01152B
oklch(19.3% 0.053 250.8)
- #201100
#201100
oklch(19.4% 0.042 71.9)
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 #01152B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.030
- Rich Navy #001219 ΔE 0.038
- Navy Blue #001146 ΔE 0.055
- Dark Navy #000435 ΔE 0.057
- Almost Black #070D0D ΔE 0.063
- Dark Navy Blue #00022E ΔE 0.064
- Very Dark Blue #000133 ΔE 0.066
- Midnight #03012D ΔE 0.066
Use #01152B 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.