#3A6FA5
Closest named color: Flat Blue (#3C73A8). oklch(53% 0.103 250.7), rgb(58, 111, 165).
Aa
White text reads best on this color (5.25:1).
About this color
#3A6FA5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.103 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.012 away. White text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #3A6FA5 |
| RGB | rgb(58, 111, 165) |
| HSL | hsl(210, 48%, 44%) |
| OKLCH | oklch(53% 0.103 250.7) |
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 #3A6FA5 | 5.25:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #3A6FA5 | 3.99:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #3A6FA5 text on white | 5.25:1 | AA | Lc 75.9 | Fine for body text |
| #3A6FA5 text on black | 3.99:1 | AA large text | Lc -25.9 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ABC3DE
oklch(80.8% 0.046 251.5)
-
Step 400
400
#7EA4CE
oklch(70.6% 0.075 251.4)
-
Step 500
500
#5C8DC1
oklch(63% 0.095 250.9)
-
Step 600
600 (this color)
#3A6FA5
oklch(53% 0.103 250.7)
-
Step 700
700
#336495
oklch(49.2% 0.095 250.3)
-
Step 800
800
#2B5179
oklch(42.6% 0.08 251.3)
-
Step 900
900
#274461
oklch(37.8% 0.061 249.7)
-
Step 950
950
#172839
oklch(27.1% 0.039 249.5)
#3A6FA5 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) | #5872A7 | 0.035 |
| Deuteranopia (no green cones) | #4967A4 | 0.025 |
| Tritanopia (no blue cones) | #007C82 | 0.082 |
| Achromatopsia (no color) | #6C6C6C | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A6FA5
#3A6FA5
oklch(53% 0.103 250.7)
- #91601B
#91601B
oklch(53% 0.103 70.4)
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 #3A6FA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.012
- Muted Blue #3B719F ΔE 0.012
- French Blue #436BAD ΔE 0.021
- Dull Blue #49759C ΔE 0.030
- Mid Blue #276AB3 ΔE 0.033
- Ocean Blue #03719C ΔE 0.034
- Nice Blue #107AB0 ΔE 0.036
- Cerulean #457B9D ΔE 0.043
Use #3A6FA5 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.