#001637
Closest named color: Navy Blue (#001146). oklch(20.6% 0.072 256.5), rgb(0, 22, 55).
Aa
White text reads best on this color (17.94:1).
About this color
#001637 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 17.94:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.16:1 |
| White text | 17.94:1 |
Values
| HEX | #001637 |
| RGB | rgb(0, 22, 55) |
| HSL | hsl(216, 100%, 11%) |
| OKLCH | oklch(20.6% 0.072 256.5) |
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 #001637 | 17.94:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #001637 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #001637 text on white | 17.94:1 | AAA | Lc 104.4 | Preferred for body text |
| #001637 text on black | 1.16:1 | 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
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBF9
oklch(88.5% 0.047 257.3)
-
Step 300
300
#9DC3F7
oklch(80.8% 0.085 256.3)
-
Step 400
400
#66A2F4
oklch(70.7% 0.136 256.5)
-
Step 500
500
#3988EF
oklch(63.1% 0.173 256.5)
-
Step 600
600
#0A6FDE
oklch(55.6% 0.189 256.5)
-
Step 700
700
#005DBE
oklch(49.2% 0.17 256.3)
-
Step 800
800
#044C9C
oklch(42.7% 0.145 256.4)
-
Step 900
900
#11407C
oklch(37.7% 0.113 256.7)
-
Step 950
950 (this color)
#001637
oklch(20.6% 0.072 256.5)
#001637 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) | #021A38 | 0.014 |
| Deuteranopia (no green cones) | #001436 | 0.007 |
| Tritanopia (no blue cones) | #001E23 | 0.054 |
| Achromatopsia (no color) | #171717 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001637
#001637
oklch(20.6% 0.072 256.5)
- #221400
#221400
oklch(20.5% 0.043 76.7)
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 #001637, 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 0.038
- Dark Navy #000435 ΔE 0.053
- Night Blue #040348 ΔE 0.054
- Rich Navy #001219 ΔE 0.061
- Very Dark Blue #000133 ΔE 0.065
- Dark Navy Blue #00022E ΔE 0.067
- Dark #1B2431 ΔE 0.068
Use #001637 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.