#3A729D
Closest named color: Muted Blue (#3B719F). oklch(53.3% 0.09 243.9), rgb(58, 114, 157).
Aa
White text reads best on this color (5.15:1).
About this color
#3A729D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.090 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.005 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #3A729D |
| RGB | rgb(58, 114, 157) |
| HSL | hsl(206, 46%, 42%) |
| OKLCH | oklch(53.3% 0.09 243.9) |
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 #3A729D | 5.15:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #3A729D | 4.07:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #3A729D text on white | 5.15:1 | AA | Lc 75.3 | Fine for body text |
| #3A729D text on black | 4.07:1 | AA large text | Lc -26.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ABC4D9
oklch(80.8% 0.04 243.6)
-
Step 400
400
#7EA6C7
oklch(70.8% 0.065 243.8)
-
Step 500
500
#5C8FB8
oklch(63.1% 0.083 243.9)
-
Step 600
600 (this color)
#3A729D
oklch(53.3% 0.09 243.9)
-
Step 700
700
#32658D
oklch(49% 0.085 244.5)
-
Step 800
800
#2B5372
oklch(42.7% 0.069 243.8)
-
Step 900
900
#27455C
oklch(37.8% 0.053 243)
-
Step 950
950
#172836
oklch(26.9% 0.035 244.4)
#3A729D 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) | #5F739F | 0.042 |
| Deuteranopia (no green cones) | #52699C | 0.034 |
| Tritanopia (no blue cones) | #007C81 | 0.068 |
| Achromatopsia (no color) | #6D6D6D | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A729D
#3A729D
oklch(53.3% 0.09 243.9)
- #916130
#916130
oklch(53.4% 0.09 64.3)
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 #3A729D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.005
- Flat Blue #3C73A8 ΔE 0.018
- Dull Blue #49759C ΔE 0.019
- Ocean Blue #03719C ΔE 0.029
- Cerulean #457B9D ΔE 0.030
- Metallic Blue #4F738E ΔE 0.032
- Sea Blue #047495 ΔE 0.032
- Nice Blue #107AB0 ΔE 0.036
Use #3A729D 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.