#01538B
Closest named color: Light Navy (#155084). oklch(43.1% 0.115 247.6), rgb(1, 83, 139).
Aa
White text reads best on this color (8.04:1).
About this color
#01538B is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.115 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.014 away. White text reads best on it, at 8.04:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.61:1 |
| White text | 8.04:1 |
Values
| HEX | #01538B |
| RGB | rgb(1, 83, 139) |
| HSL | hsl(204, 99%, 27%) |
| OKLCH | oklch(43.1% 0.115 247.6) |
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 #01538B | 8.04:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #01538B | 2.61:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #01538B text on white | 8.04:1 | AAA | Lc 87.3 | Fine for body text |
| #01538B text on black | 2.61:1 | Fails | Lc -14.9 | 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 800.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9FC5EA
oklch(80.9% 0.066 248)
-
Step 400
400
#67A6E0
oklch(70.6% 0.108 247.6)
-
Step 500
500
#388FD7
oklch(63.1% 0.136 247.3)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800 (this color)
#01538B
oklch(43.1% 0.115 247.6)
-
Step 900
900
#10446E
oklch(37.6% 0.089 247.9)
-
Step 950
950
#0C2840
oklch(26.9% 0.056 247.6)
#01538B 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) | #37568D | 0.039 |
| Deuteranopia (no green cones) | #224B8A | 0.026 |
| Tritanopia (no blue cones) | #006168 | 0.082 |
| Achromatopsia (no color) | #505050 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01538B
#01538B
oklch(43.1% 0.115 247.6)
- #724400
#724400
oklch(43.1% 0.095 67.2)
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 #01538B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.014
- Deep Sea Blue #015482 ΔE 0.016
- Dusk Blue #26538D ΔE 0.020
- Cobalt #1E488F ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.052
- Peacock Blue #016795 ΔE 0.060
Use #01538B 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.