#001B2C
Closest named color: Rich Black (#0D1B2A). oklch(21.1% 0.048 239.2), rgb(0, 27, 44).
Aa
White text reads best on this color (17.60:1).
About this color
#001B2C is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.048 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.016 away. White text reads best on it, at 17.60:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.60:1 |
Values
| HEX | #001B2C |
| RGB | rgb(0, 27, 44) |
| HSL | hsl(203, 100%, 9%) |
| OKLCH | oklch(21.1% 0.048 239.2) |
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 #001B2C | 17.60:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #001B2C | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #001B2C text on white | 17.60:1 | AAA | Lc 104.2 | Preferred for body text |
| #001B2C text on black | 1.19:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DDEC
oklch(88.6% 0.031 237.6)
-
Step 300
300
#A0C6E2
oklch(80.8% 0.057 240.3)
-
Step 400
400
#69A9D3
oklch(70.8% 0.09 238.6)
-
Step 500
500
#3A92C8
oklch(63.1% 0.116 239.5)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#104665
oklch(37.6% 0.076 239.3)
-
Step 950
950 (this color)
#001B2C
oklch(21.1% 0.048 239.2)
#001B2C 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) | #131B2D | 0.025 |
| Deuteranopia (no green cones) | #0C172C | 0.019 |
| Tritanopia (no blue cones) | #001F21 | 0.030 |
| Achromatopsia (no color) | #191919 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001B2C
#001B2C
oklch(21.1% 0.048 239.2)
- #281201
#281201
oklch(21% 0.048 58.9)
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 #001B2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.016
- Rich Navy #001219 ΔE 0.047
- Dark #1B2431 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.061
- Navy Blue #001146 ΔE 0.061
- Jet #212529 ΔE 0.064
- Almost Black #070D0D ΔE 0.072
- Dark Navy #000435 ΔE 0.076
Use #001B2C 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.