#0D537B
Closest named color: Deep Sea Blue (#015482). oklch(42.3% 0.092 240.8), rgb(13, 83, 123).
Aa
White text reads best on this color (8.26:1).
About this color
#0D537B is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.092 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.012 away. White text reads best on it, at 8.26:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #0D537B |
| RGB | rgb(13, 83, 123) |
| HSL | hsl(202, 81%, 27%) |
| OKLCH | oklch(42.3% 0.092 240.8) |
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 #0D537B | 8.26:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #0D537B | 2.54:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #0D537B text on white | 8.26:1 | AAA | Lc 88.1 | Fine for body text |
| #0D537B text on black | 2.54:1 | Fails | Lc -14.0 | 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 800.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A2C6E1
oklch(80.9% 0.054 240.8)
-
Step 400
400
#6EA8D1
oklch(70.7% 0.085 240.3)
-
Step 500
500
#4391C6
oklch(63.1% 0.111 241.3)
-
Step 600
600
#1B7BB2
oklch(55.7% 0.119 240.4)
-
Step 700
700
#086799
oklch(49.1% 0.111 240.7)
-
Step 800
800 (this color)
#0D537B
oklch(42.3% 0.092 240.8)
-
Step 900
900
#174664
oklch(37.8% 0.072 240.7)
-
Step 950
950
#0F293A
oklch(26.9% 0.045 240)
#0D537B 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) | #40547D | 0.046 |
| Deuteranopia (no green cones) | #314A7A | 0.035 |
| Tritanopia (no blue cones) | #005D61 | 0.062 |
| Achromatopsia (no color) | #4E4E4E | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D537B
#0D537B
oklch(42.3% 0.092 240.8)
- #71400B
#71400B
oklch(42.2% 0.092 61)
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 #0D537B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.012
- Light Navy #155084 ΔE 0.020
- Dusk Blue #26538D ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.039
- Twilight Blue #0A437A ΔE 0.050
- Cobalt #1E488F ΔE 0.051
- YInMn Blue #415A77 ΔE 0.054
- Petrol #005F6A ΔE 0.054
Use #0D537B 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.