#011939
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.07 255.5), rgb(1, 25, 57).
Aa
White text reads best on this color (17.50:1).
About this color
#011939 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.070 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.034 away. White text reads best on it, at 17.50:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.50:1 |
Values
| HEX | #011939 |
| RGB | rgb(1, 25, 57) |
| HSL | hsl(214, 97%, 11%) |
| OKLCH | oklch(21.7% 0.07 255.5) |
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 #011939 | 17.50:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #011939 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #011939 text on white | 17.50:1 | AAA | Lc 104.1 | Preferred for body text |
| #011939 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9DC3F6
oklch(80.8% 0.083 255.9)
-
Step 400
400
#66A3F1
oklch(70.7% 0.131 255.2)
-
Step 500
500
#3889ED
oklch(63.1% 0.17 255.6)
-
Step 600
600
#0670DB
oklch(55.5% 0.184 255.6)
-
Step 700
700
#005EBB
oklch(49.1% 0.165 255.5)
-
Step 800
800
#024D9A
oklch(42.8% 0.141 255.4)
-
Step 900
900
#10417A
oklch(37.7% 0.11 255.3)
-
Step 950
950 (this color)
#011939
oklch(21.7% 0.07 255.5)
#011939 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) | #061C3A | 0.013 |
| Deuteranopia (no green cones) | #001738 | 0.007 |
| Tritanopia (no blue cones) | #002126 | 0.052 |
| Achromatopsia (no color) | #191919 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #011939
#011939
oklch(21.7% 0.07 255.5)
- #261600
#261600
oklch(21.6% 0.046 74.4)
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 #011939, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.034
- Navy Blue #001146 ΔE 0.035
- Dark #1B2431 ΔE 0.059
- Oxford Blue #1B263B ΔE 0.060
- Night Blue #040348 ΔE 0.060
- Dark Navy #000435 ΔE 0.064
- Rich Navy #001219 ΔE 0.067
- Dark Indigo #1F0954 ΔE 0.074
Use #011939 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.