#001839
Closest named color: Navy Blue (#001146). oklch(21.3% 0.072 255.6), rgb(0, 24, 57).
Aa
White text reads best on this color (17.65:1).
About this color
#001839 is a very dark, moderately saturated blue. In OKLCH its lightness is 21%, its chroma 0.072 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.032 away. White text reads best on it, at 17.65:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.18:1 |
| White text | 17.65:1 |
Values
| HEX | #001839 |
| RGB | rgb(0, 24, 57) |
| HSL | hsl(215, 100%, 11%) |
| OKLCH | oklch(21.3% 0.072 255.6) |
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 #001839 | 17.65:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #001839 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #001839 text on white | 17.65:1 | AAA | Lc 104.2 | Preferred for body text |
| #001839 text on black | 1.18:1 | 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
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9CC3F7
oklch(80.8% 0.085 255.8)
-
Step 400
400
#64A3F4
oklch(70.8% 0.136 255.4)
-
Step 500
500
#3589F0
oklch(63.2% 0.174 255.6)
-
Step 600
600
#0070DD
oklch(55.6% 0.187 255.6)
-
Step 700
700
#005EBB
oklch(49.1% 0.165 255.5)
-
Step 800
800
#004C9B
oklch(42.6% 0.144 255.8)
-
Step 900
900
#0E417C
oklch(37.8% 0.113 255.4)
-
Step 950
950 (this color)
#001839
oklch(21.3% 0.072 255.6)
#001839 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) | #041B3A | 0.012 |
| Deuteranopia (no green cones) | #001638 | 0.007 |
| Tritanopia (no blue cones) | #002025 | 0.054 |
| Achromatopsia (no color) | #191919 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001839
#001839
oklch(21.3% 0.072 255.6)
- #251600
#251600
oklch(21.5% 0.045 76.3)
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 #001839, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.032
- Rich Black #0D1B2A ΔE 0.037
- Night Blue #040348 ΔE 0.057
- Dark Navy #000435 ΔE 0.060
- Dark #1B2431 ΔE 0.063
- Oxford Blue #1B263B ΔE 0.063
- Rich Navy #001219 ΔE 0.066
- Very Dark Blue #000133 ΔE 0.072
Use #001839 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.