#011D33
Closest named color: Rich Black (#0D1B2A). oklch(22.3% 0.055 245.5), rgb(1, 29, 51).
Aa
White text reads best on this color (17.14:1).
About this color
#011D33 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.055 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.021 away. White text reads best on it, at 17.14:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.14:1 |
Values
| HEX | #011D33 |
| RGB | rgb(1, 29, 51) |
| HSL | hsl(206, 96%, 10%) |
| OKLCH | oklch(22.3% 0.055 245.5) |
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 #011D33 | 17.14:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #011D33 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #011D33 text on white | 17.14:1 | AAA | Lc 103.8 | Preferred for body text |
| #011D33 text on black | 1.22:1 | 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
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9EC6E9
oklch(81% 0.065 245.1)
-
Step 400
400
#67A7DD
oklch(70.7% 0.103 245.4)
-
Step 500
500
#3690D4
oklch(63.1% 0.133 245.2)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#0E456C
oklch(37.7% 0.086 245.2)
-
Step 950
950 (this color)
#011D33
oklch(22.3% 0.055 245.5)
#011D33 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) | #121E34 | 0.021 |
| Deuteranopia (no green cones) | #0A1933 | 0.016 |
| Tritanopia (no blue cones) | #002225 | 0.037 |
| Achromatopsia (no color) | #1B1B1B | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #011D33
#011D33
oklch(22.3% 0.055 245.5)
- #2B1600
#2B1600
oklch(22.5% 0.05 66)
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 #011D33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.021
- Dark #1B2431 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.050
- Navy Blue #001146 ΔE 0.054
- Jet #212529 ΔE 0.060
- Rich Navy #001219 ΔE 0.061
- Dark Navy #000435 ΔE 0.079
- Night Blue #040348 ΔE 0.079
Use #011D33 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.