#3D748B
Closest named color: Metallic Blue (#4F738E). oklch(53.1% 0.068 227.4), rgb(61, 116, 139).
Aa
White text reads best on this color (5.16:1).
About this color
#3D748B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 53%, its chroma 0.068 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.020 away. White text reads best on it, at 5.16:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #3D748B |
| RGB | rgb(61, 116, 139) |
| HSL | hsl(198, 39%, 39%) |
| OKLCH | oklch(53.1% 0.068 227.4) |
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 #3D748B | 5.16:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #3D748B | 4.06:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #3D748B text on white | 5.16:1 | AA | Lc 75.4 | Fine for body text |
| #3D748B text on black | 4.06:1 | AA large text | Lc -26.3 | 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
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE2
oklch(88.6% 0.017 225.2)
-
Step 300
300
#ADC5D0
oklch(80.9% 0.03 227.1)
-
Step 400
400
#81A7B9
oklch(70.7% 0.049 228.5)
-
Step 500
500
#5F91A7
oklch(63% 0.063 227.5)
-
Step 600
600 (this color)
#3D748B
oklch(53.1% 0.068 227.4)
-
Step 700
700
#36687D
oklch(49.1% 0.063 227.5)
-
Step 800
800
#2D5566
oklch(42.8% 0.053 227.6)
-
Step 900
900
#294653
oklch(37.7% 0.041 228.3)
-
Step 950
950
#182930
oklch(26.9% 0.026 225.8)
#3D748B 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) | #68728C | 0.051 |
| Deuteranopia (no green cones) | #5D6A8B | 0.045 |
| Tritanopia (no blue cones) | #007B7B | 0.049 |
| Achromatopsia (no color) | #6D6D6D | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D748B
#3D748B
oklch(53.1% 0.068 227.4)
- #8D6049
#8D6049
oklch(53.1% 0.068 47.9)
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 #3D748B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.020
- Dull Blue #49759C ΔE 0.031
- Ocean #017B92 ΔE 0.032
- Sea Blue #047495 ΔE 0.032
- Cerulean #457B9D ΔE 0.033
- Muted Blue #3B719F ΔE 0.036
- Stormy Blue #507B9C ΔE 0.039
- Deep Aqua #08787F ΔE 0.040
Use #3D748B 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.