#011B2D
Closest named color: Rich Black (#0D1B2A). oklch(21.3% 0.048 241.7), rgb(1, 27, 45).
Aa
White text reads best on this color (17.55:1).
About this color
#011B2D is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.048 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.015 away. White text reads best on it, at 17.55:1.
| 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 | 17.55:1 |
Values
| HEX | #011B2D |
| RGB | rgb(1, 27, 45) |
| HSL | hsl(205, 96%, 9%) |
| OKLCH | oklch(21.3% 0.048 241.7) |
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 #011B2D | 17.55:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #011B2D | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #011B2D text on white | 17.55:1 | AAA | Lc 104.2 | Preferred for body text |
| #011B2D 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
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A1C6E3
oklch(80.9% 0.057 242)
-
Step 400
400
#6BA8D5
oklch(70.8% 0.092 241.7)
-
Step 500
500
#3E91CA
oklch(63.1% 0.117 242)
-
Step 600
600
#0E7AB7
oklch(55.5% 0.128 242.1)
-
Step 700
700
#00679C
oklch(49.2% 0.116 241.5)
-
Step 800
800
#06547F
oklch(42.7% 0.098 241.5)
-
Step 900
900
#134666
oklch(37.7% 0.076 241)
-
Step 950
950 (this color)
#011B2D
oklch(21.3% 0.048 241.7)
#011B2D 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) | #121B2E | 0.022 |
| Deuteranopia (no green cones) | #0C172D | 0.018 |
| Tritanopia (no blue cones) | #001F21 | 0.032 |
| Achromatopsia (no color) | #191919 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #011B2D
#011B2D
oklch(21.3% 0.048 241.7)
- #281300
#281300
oklch(21.3% 0.048 63.3)
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 #011B2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.015
- Rich Navy #001219 ΔE 0.049
- Dark #1B2431 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.059
- Navy Blue #001146 ΔE 0.060
- Jet #212529 ΔE 0.063
- Almost Black #070D0D ΔE 0.074
- Dark Navy #000435 ΔE 0.076
Use #011B2D 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.