#01538A
Closest named color: Light Navy (#155084). oklch(43.1% 0.113 247.2), rgb(1, 83, 138).
Aa
White text reads best on this color (8.05:1).
About this color
#01538A is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.113 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.013 away. White text reads best on it, at 8.05:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #01538A |
| RGB | rgb(1, 83, 138) |
| HSL | hsl(204, 99%, 27%) |
| OKLCH | oklch(43.1% 0.113 247.2) |
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 #01538A | 8.05:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #01538A | 2.60:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #01538A text on white | 8.05:1 | AAA | Lc 87.3 | Fine for body text |
| #01538A text on black | 2.60:1 | Fails | Lc -14.8 | 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
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#9FC5EA
oklch(80.9% 0.066 248)
-
Step 400
400
#68A6DF
oklch(70.6% 0.106 247.6)
-
Step 500
500
#398FD6
oklch(63.1% 0.135 247.1)
-
Step 600
600
#0078C4
oklch(55.7% 0.147 247.1)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800 (this color)
#01538A
oklch(43.1% 0.113 247.2)
-
Step 900
900
#10446D
oklch(37.6% 0.088 247.3)
-
Step 950
950
#0C2840
oklch(26.9% 0.056 247.6)
#01538A 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) | #38568C | 0.041 |
| Deuteranopia (no green cones) | #234B89 | 0.026 |
| Tritanopia (no blue cones) | #006068 | 0.078 |
| Achromatopsia (no color) | #505050 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01538A
#01538A
oklch(43.1% 0.113 247.2)
- #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 #01538A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.013
- Deep Sea Blue #015482 ΔE 0.014
- Dusk Blue #26538D ΔE 0.021
- Cobalt #1E488F ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.037
- Twilight Blue #0A437A ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.052
- Peacock Blue #016795 ΔE 0.060
Use #01538A 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.