#03537D
Closest named color: Deep Sea Blue (#015482). oklch(42.2% 0.097 240.7), rgb(3, 83, 125).
Aa
White text reads best on this color (8.27:1).
About this color
#03537D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.097 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.008 away. White text reads best on it, at 8.27:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.53:1 |
| White text | 8.27:1 |
Values
| HEX | #03537D |
| RGB | rgb(3, 83, 125) |
| HSL | hsl(201, 95%, 25%) |
| OKLCH | oklch(42.2% 0.097 240.7) |
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 #03537D | 8.27:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #03537D | 2.53:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #03537D text on white | 8.27:1 | AAA | Lc 88.1 | Fine for body text |
| #03537D text on black | 2.53:1 | Fails | Lc -14.1 | 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
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A1C6E2
oklch(80.9% 0.056 241)
-
Step 400
400
#6BA8D4
oklch(70.7% 0.09 241)
-
Step 500
500
#3D91C8
oklch(63% 0.116 240.9)
-
Step 600
600
#0D7BB5
oklch(55.7% 0.125 240.5)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800 (this color)
#03537D
oklch(42.2% 0.097 240.7)
-
Step 900
900
#134666
oklch(37.7% 0.076 241)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#03537D 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) | #3F547F | 0.048 |
| Deuteranopia (no green cones) | #2F4A7C | 0.036 |
| Tritanopia (no blue cones) | #005E62 | 0.065 |
| Achromatopsia (no color) | #4E4E4E | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03537D
#03537D
oklch(42.2% 0.097 240.7)
- #733F03
#733F03
oklch(42.3% 0.097 60.7)
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 #03537D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.008
- Light Navy #155084 ΔE 0.018
- Dusk Blue #26538D ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.040
- Twilight Blue #0A437A ΔE 0.048
- Cobalt #1E488F ΔE 0.049
- Petrol #005F6A ΔE 0.056
- YInMn Blue #415A77 ΔE 0.057
Use #03537D 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.