#3A558D
Closest named color: Denim Blue (#3B5B92). oklch(45.6% 0.097 263.5), rgb(58, 85, 141).
Aa
White text reads best on this color (7.33:1).
About this color
#3A558D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.097 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.018 away. White text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.86:1 |
| White text | 7.33:1 |
Values
| HEX | #3A558D |
| RGB | rgb(58, 85, 141) |
| HSL | hsl(220, 42%, 39%) |
| OKLCH | oklch(45.6% 0.097 263.5) |
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 #3A558D | 7.33:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #3A558D | 2.86:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #3A558D text on white | 7.33:1 | AAA | Lc 85.3 | Fine for body text |
| #3A558D text on black | 2.86:1 | Fails | Lc -16.7 | 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 800.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#AEC1E6
oklch(80.9% 0.056 263.7)
-
Step 400
400
#83A0DA
oklch(70.6% 0.091 263.7)
-
Step 500
500
#6488D0
oklch(63.1% 0.116 263.2)
-
Step 600
600
#4C70BD
oklch(55.5% 0.127 263.8)
-
Step 700
700
#3D5EA3
oklch(49.2% 0.117 263.4)
-
Step 800
800 (this color)
#3A558D
oklch(45.6% 0.097 263.5)
-
Step 900
900
#2C406A
oklch(37.6% 0.077 263.8)
-
Step 950
950
#1A263E
oklch(27% 0.048 263.3)
#3A558D 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) | #3E5A8F | 0.016 |
| Deuteranopia (no green cones) | #33538C | 0.011 |
| Tritanopia (no blue cones) | #00616A | 0.086 |
| Achromatopsia (no color) | #565656 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A558D
#3A558D
oklch(45.6% 0.097 263.5)
- #705100
#705100
oklch(45.6% 0.094 83)
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 #3A558D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.018
- Light Navy Blue #2E5A88 ΔE 0.021
- Dusk Blue #26538D ΔE 0.022
- Twilight #4E518B ΔE 0.028
- Dusk #4E5481 ΔE 0.032
- Dusky Blue #475F94 ΔE 0.036
- Light Navy #155084 ΔE 0.042
- Denim #3B638C ΔE 0.042
Use #3A558D 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.