#001840
Closest named color: Navy Blue (#001146). oklch(22% 0.083 258.4), rgb(0, 24, 64).
Aa
White text reads best on this color (17.43:1).
About this color
#001840 is a very dark, moderately saturated blue. In OKLCH its lightness is 22%, its chroma 0.083 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.023 away. White text reads best on it, at 17.43:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.20:1 |
| White text | 17.43:1 |
Values
| HEX | #001840 |
| RGB | rgb(0, 24, 64) |
| HSL | hsl(218, 100%, 13%) |
| OKLCH | oklch(22% 0.083 258.4) |
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 #001840 | 17.43:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #001840 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #001840 text on white | 17.43:1 | AAA | Lc 103.9 | Preferred for body text |
| #001840 text on black | 1.20:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFE
oklch(88.6% 0.054 258.7)
-
Step 300
300
#9AC2FF
oklch(80.8% 0.097 258.7)
-
Step 400
400
#61A0FF
oklch(70.6% 0.154 258.4)
-
Step 500
500
#2F84FF
oklch(63% 0.2 258.5)
-
Step 600
600
#006BEA
oklch(55.6% 0.209 258.4)
-
Step 700
700
#005AC7
oklch(49.2% 0.185 258.3)
-
Step 800
800
#0049A5
oklch(42.7% 0.162 258.5)
-
Step 900
900
#093E85
oklch(37.7% 0.13 258.2)
-
Step 950
950 (this color)
#001840
oklch(22% 0.083 258.4)
#001840 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) | #001D41 | 0.016 |
| Deuteranopia (no green cones) | #00173F | 0.004 |
| Tritanopia (no blue cones) | #002229 | 0.062 |
| Achromatopsia (no color) | #1A1A1A | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001840
#001840
oklch(22% 0.083 258.4)
- #261700
#261700
oklch(21.9% 0.046 77.1)
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 #001840, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.023
- Rich Black #0D1B2A ΔE 0.048
- Night Blue #040348 ΔE 0.050
- Dark Navy #000435 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.064
- Dark Indigo #1F0954 ΔE 0.064
- Dark #1B2431 ΔE 0.067
- Darkblue #030764 ΔE 0.071
Use #001840 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.