#3D728B
Closest named color: Metallic Blue (#4F738E). oklch(52.6% 0.069 230.4), rgb(61, 114, 139).
Aa
White text reads best on this color (5.27:1).
About this color
#3D728B is a medium-dark, muted blue. In OKLCH its lightness is 53%, its chroma 0.069 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.021 away. White text reads best on it, at 5.27:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.97:1 |
| White text | 5.27:1 |
Values
| HEX | #3D728B |
| RGB | rgb(61, 114, 139) |
| HSL | hsl(199, 39%, 39%) |
| OKLCH | oklch(52.6% 0.069 230.4) |
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 #3D728B | 5.27:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #3D728B | 3.97:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #3D728B text on white | 5.27:1 | AA | Lc 76.1 | Fine for body text |
| #3D728B text on black | 3.97:1 | AA large text | Lc -25.6 | Dividers and decoration only |
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 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDBE2
oklch(88.4% 0.017 230.9)
-
Step 300
300
#ADC5D1
oklch(80.9% 0.031 229.3)
-
Step 400
400
#81A7BA
oklch(70.7% 0.05 229.9)
-
Step 500
500
#6191A9
oklch(63.1% 0.063 230.7)
-
Step 600
600 (this color)
#3D728B
oklch(52.6% 0.069 230.4)
-
Step 700
700
#37677E
oklch(49% 0.064 230.8)
-
Step 800
800
#2E5467
oklch(42.6% 0.054 231.6)
-
Step 900
900
#2A4654
oklch(37.8% 0.041 231)
-
Step 950
950
#192931
oklch(27% 0.026 230.6)
#3D728B 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) | #65708C | 0.048 |
| Deuteranopia (no green cones) | #5A688B | 0.042 |
| Tritanopia (no blue cones) | #00797A | 0.051 |
| Achromatopsia (no color) | #6C6C6C | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D728B
#3D728B
oklch(52.6% 0.069 230.4)
- #8B5F46
#8B5F46
oklch(52.6% 0.069 50.3)
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 #3D728B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.021
- Dull Blue #49759C ΔE 0.031
- Sea Blue #047495 ΔE 0.031
- Muted Blue #3B719F ΔE 0.033
- Ocean #017B92 ΔE 0.035
- Cerulean #457B9D ΔE 0.037
- Ocean Blue #03719C ΔE 0.040
- Stormy Blue #507B9C ΔE 0.042
Use #3D728B 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.