#3A718B
Closest named color: Metallic Blue (#4F738E). oklch(52.2% 0.071 230.7), rgb(58, 113, 139).
Aa
White text reads best on this color (5.36:1).
About this color
#3A718B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.071 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.024 away. White text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.91:1 |
| White text | 5.36:1 |
Values
| HEX | #3A718B |
| RGB | rgb(58, 113, 139) |
| HSL | hsl(199, 41%, 39%) |
| OKLCH | oklch(52.2% 0.071 230.7) |
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 #3A718B | 5.36:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #3A718B | 3.91:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #3A718B text on white | 5.36:1 | AA | Lc 76.6 | Fine for body text |
| #3A718B text on black | 3.91:1 | AA large text | Lc -25.2 | 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 700.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D3
oklch(80.8% 0.034 231.3)
-
Step 400
400
#7EA7BD
oklch(70.6% 0.055 231.9)
-
Step 500
500
#5B92AC
oklch(63.2% 0.07 229.7)
-
Step 600
600
#3F7B98
oklch(55.5% 0.077 231.4)
-
Step 700
700 (this color)
#3A718B
oklch(52.2% 0.071 230.7)
-
Step 800
800
#295569
oklch(42.7% 0.059 229.8)
-
Step 900
900
#264656
oklch(37.7% 0.047 231.6)
-
Step 950
950
#172932
oklch(27% 0.029 231)
#3A718B 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) | #646F8C | 0.049 |
| Deuteranopia (no green cones) | #59678B | 0.043 |
| Tritanopia (no blue cones) | #007879 | 0.051 |
| Achromatopsia (no color) | #6B6B6B | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A718B
#3A718B
oklch(52.2% 0.071 230.7)
- #8B5D43
#8B5D43
oklch(52.2% 0.072 50.1)
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 #3A718B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.024
- Sea Blue #047495 ΔE 0.029
- Muted Blue #3B719F ΔE 0.033
- Dull Blue #49759C ΔE 0.033
- Ocean #017B92 ΔE 0.035
- Ocean Blue #03719C ΔE 0.037
- Cerulean #457B9D ΔE 0.040
- Deep Aqua #08787F ΔE 0.042
Use #3A718B 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.